以下對本發明進行詳細說明。 本發明之液體口腔用組合物含有選自碳酸氫鈉、碳酸鈉、及倍半碳酸鈉中之1種或2種以上之碳酸鹽作為成分(A)。該等碳酸鹽均具有緩衝能力，並且亦可用作pH值調整劑，於本發明中將該等作為成分(A)，可使用選自碳酸氫鈉、碳酸鈉、及倍半碳酸鈉中之1種，更佳為調配且含有選自碳酸氫鈉、碳酸鈉、及倍半碳酸鈉中之碳酸鹽。所謂使用選自碳酸氫鈉、碳酸鈉、及倍半碳酸鈉中之碳酸鹽係使用將碳酸氫鈉與碳酸鈉併用之混合物、或單獨使用倍半碳酸鈉、或碳酸氫鈉、碳酸鈉、及倍半碳酸鈉均被使用之任一態樣。藉由使用該成分(A)，可充分地發揮各自所具有之緩衝能力，於口腔內持續地供給氫氧離子，如後述般將pH值調整為特定之鹼性區域，使用感良好，並且充分地發揮有效去除附著於牙面等之著色污垢之效果。作為該成分(A)，就提高著色污垢之去除效果之觀點而言，較佳為併用碳酸氫鈉與碳酸鈉。 成分(A)之含量就確保較高之著色污垢之去除效果之觀點而言，於本發明之液體口腔用組合物中，以碳酸(H2
CO3
)換算量計為0.1質量%以上，較佳為0.15質量%以上，更佳為0.18質量%以上，進而較佳為0.20質量%以上。又，成分(A)之含量就抑制於牙齦或口腔內黏膜之為害性等之觀點、及確保風味之觀點而言，於本發明之液體口腔用組合物中，以碳酸換算量計為2質量%以下，較佳為1.5質量%以下，更佳為1.3質量%以下，進而較佳為1.0質量%以下，進而更佳為0.6質量%以下。並且，成分(A)之含量於本發明之液體口腔用組合物中，以碳酸換算量計為0.1質量%以上且2質量%以下，較佳為0.15～1.5質量%，更佳為0.18～1.3質量%，進而較佳為0.20～1.0質量%，進而更佳為0.20～0.6質量%。 本發明之液體口腔用組合物含有陰離子界面活性劑0.2質量%以上且1.7質量%以下作為成分(B)。藉由以該量含有成分(B)，能夠協同地提高利用上述成分(A)所得之著色污垢之去除效果，並且能夠有效地防止為害性等表現，保持良好之使用感。 作為該成分(B)，例如可列舉：選自烷基硫酸鈉等烷基硫酸酯鹽、醯基麩胺酸鈉或醯基肌胺酸鈉等醯基胺基酸鹽、月桂基甲基牛磺酸鈉等N-甲基長鏈醯基牛磺酸鈉鹽、烷基磷酸鈉等烷基磷酸鹽、高級脂肪酸磺化單甘油酯鹽、羥乙磺酸之脂肪酸酯鹽、及聚氧乙烯單烷基磷酸鹽中之1種或2種以上。其中，就兼具著色污垢之較高之去除效果及良好之使用感之觀點而言，較佳為選自烷基硫酸鈉、醯基麩胺酸鈉、及月桂基甲基牛磺酸鈉中之1種或2種以上，更佳為至少含有烷基硫酸鈉，又，更佳為併用烷基硫酸鈉與其他之成分(B)。 作為該烷基硫酸鈉，具體而言，可列舉：具有碳數8～18之飽和或不飽和之烷基的烷基硫酸鈉，就溶解性、製造性及使用感之觀點而言，較佳為具有碳數10～14之飽和或不飽和之烷基的烷基硫酸鈉，更具體而言，更佳為選自月桂基硫酸鈉及肉豆蔻基硫酸鈉中之1種或2種，進而較佳為月桂基硫酸鈉。 成分(B)之含量就有效提高著色污垢之去除效果之觀點而言，於本發明之液體口腔用組合物中為0.2質量%以上，較佳為0.4質量%以上，更佳為0.5質量%以上。又，成分(B)之含量就有效抑制於牙齦或口腔內黏膜之為害性等之觀點、及保持良好之風味之觀點而言，於本發明之液體口腔用組合物中為1.7質量%以下，較佳為1.6質量%以下，更佳為1.5質量%以下，進而較佳為1.2質量%以下，進而更佳為1.0質量%以下。並且，成分(B)之含量於本發明之液體口腔用組合物中為0.2質量%以上且1.7質量%以下，較佳為0.4～1.6質量%，更佳為0.5～1.5質量%，進而較佳為0.5～1.2質量%以下，進而更佳為0.5～1.0質量%以下。 成分(A)之碳酸換算量與成分(B)之含量的乘積之值((A)×(B))就有效地兼具著色污垢之較高之去除效果及藉由抑制為害性等獲得之良好之使用感之觀點而言為0.9以下，較佳為0.8以下，更佳為0.5以下，進而較佳為0.4以下，且較佳為0.08以上，更佳為0.10以上。並且，成分(A)之碳酸換算量與成分(B)之含量的乘積之值((A)×(B))為0.9以下，較佳為0.08～0.9，更佳為0.08～0.8，進而較佳為0.10～0.5，進而較佳為0.10～0.4。此處，成分(A)之碳酸換算量與成分(B)之含量的乘積為各組合物100質量%中之質量%表示之數值的乘積。 上述成分(A)隨著其碳酸換算量增大，主要具有如下特性，即，增加液體口腔用組合物之pH值超過下述特定之鹼性區域、或者風味降低之擔憂，另一方面，上述成分(B)隨著其含量增大，主要具有如下特性，即，增加不僅為害性等變得容易表現，且風味亦有所損失而使用感降低之擔憂。本發明者在參考此種成分(A)及成分(B)所具有之各種特性後發現，於液體口腔用組合物中，於確保優異之著色污垢之去除效果及良好之使用感之兩者方面上，非常有效的是在使優異之著色污垢之去除效果及良好之使用感同時實現之際，以上述特定之量含有成分(A)及成分(B)，此外使該等含量之乘積之值((A)×(B))處於上述特定之範圍。 成分(A)之碳酸換算量與成分(B)之含量的合計量就有效提高著色污垢之去除效果之觀點而言，於本發明之液體口腔用組合物中，較佳為0.5質量%以上，更佳為0.55質量%以上，進而較佳為0.7質量%以上，進而更佳為0.75質量%以上。又，成分(A)之碳酸換算量與成分(B)之含量的合計量就有效抑制於牙齦或口腔內黏膜之為害性等之觀點、及保持良好之風味之觀點而言，於本發明之液體口腔用組合物中，較佳為2.4質量%以下，更佳為2.2質量%以下，進而較佳為2.0質量%以下，進而更佳為1.6質量%以下。並且，成分(A)之碳酸換算量與成分(B)之含量的合計量於本發明之液體口腔用組合物中較佳為0.5～2.4質量%，更佳為0.55～2.2質量%，進而較佳為0.7～2.0質量%，進而更佳為0.75～1.6質量%。 本發明之液體口腔用組合物含有水60質量%以上且99.5質量%以下作為成分(C)。所謂本發明中之成分(C)之水，係指液體口腔用組合物中所包含之全部水分，其不僅包括調配成液體口腔用組合物之純化水或離子交換水等，亦包括調配之各成分所包含之水分。藉由含有該成分(C)之水，可使各成分良好地分散或溶解，並且於使用時亦可使液體口腔用組合物良好地擴散至口腔內各個角落，而發揮出優異之著色污垢之去除效果。再者，若水之含量未達60質量%之潔牙劑等口腔用組合物，則容易偏集存在於口腔內特定之部位，故而只能獲得局部之效果，就於遍及整個口腔內獲得所期望之效果之觀點、或即便被唾液稀釋而亦於遍至整個口腔內獲得所期望之效果之觀點而言，較佳為如本發明之液體口腔用組合物般，藉由於口腔內含漱一定時間，儘可能保持各成分之含量等不變之狀態下容易地應用於整個口腔內。 成分(C)之含量就使各成分良好地分散或溶解之觀點而言，於本發明之液體口腔用組合物中為60質量%以上，較佳為65質量%以上，更佳為70質量%以上。又，成分(C)之含量就確保優異之著色污垢之去除效果之觀點而言，於本發明之液體口腔用組合物中為99.5質量%以下，較佳為99.2質量%以下，更佳為99.15質量%以下。並且，成分(C)之含量於本發明之液體口腔用組合物中為60質量%以上且99.5質量%以下，較佳為65～99.2質量%，更佳為70～99.15質量%。 本發明之液體口腔用組合物的多價金屬陽離子(D)之含量相對於成分(A)未達0.1倍莫耳。該多價金屬陽離子於本發明之液體口腔用組合物中，有使成分(A)等不溶解、或使著色污垢之去除效果降低之虞，因此需要限制其含量。多價金屬陽離子之合計含量使用ICP(inductively coupled plasma，感應耦合電漿)發光分析法(ICP發光分析裝置：Perkin Elmer公司，Optima 5300DV)進行測定，相對於成分(A)之碳酸換算量未達0.1倍莫耳，較佳為0.02倍莫耳以下。因此，於本發明之液體口腔用組合物中，期望不含有供給鋁、鈣、鎂、鐵、鋅等之多價金屬陽離子之成分，又，除了不可避免地混入之情形以外，亦可為不含有多價金屬陽離子者。再者，上述多價金屬陽離子只要為含有多價金屬之成分，則即便例如為不溶性之多價金屬鹽且以粒狀體之形式存在於組合物中，亦有使藉由成分(A)所得之本發明之效果減少之傾向。例如，即便為氫氧化鋁般之研磨性粉體，亦向液體口腔用組合物中供給鋁離子。因此，於本發明之液體口腔用組合物含有多價金屬鹽之情形時，認為由於向液體口腔用組合物中所包含之水分逐步微量地供給陽離子，或者因多價金屬鹽與成分(A)之接觸而亦吸附成分(A)，故而產生藉由成分(A)所得之著色污垢去除性能之降低。 再者，於本說明書中所謂「粒狀體」係研磨性粉體及顆粒之總稱，係指呈現平均粒徑5～800 μm之粒狀之研磨性粉體及顆粒。於本發明之液體口腔用組合物中，該粒狀體就抑制使成分(A)等不溶解、或者使著色污垢之去除效果降低之觀點而言，較佳為限制其含量。 所謂研磨性粉體係作為研磨劑能夠發揮功能之粉體，作為該研磨性粉體，具體而言，例如除了上述氫氧化鋁以外，可列舉：磷酸二氫鈣、磷酸三鈣、不溶性偏磷酸鈉、磷酸鎂、碳酸鈣、焦磷酸鈣、複合鋁矽酸鹽等。 所謂顆粒，係藉由將特定之材料進行造粒而獲得之凝集體，作為該材料，例如可列舉輕質碳酸鈣、重質碳酸鈣、沸石、磷酸二鈣、磷酸三鈣、不溶性偏磷酸鈉、氫氧化鋁、磷酸鎂、焦磷酸鈣、碳酸鎂、矽酸鋁鎂、合成矽酸鋁、矽酸鈣、膨潤土、蒙脫石、高嶺土、氫氧化鋁凝膠、氧化鋁溶膠、合成鋁碳酸鎂、碳酸鎂、氧化鎂、氫氧化鎂，此外可列舉硬脂酸鎂、硬脂酸鈣等高級脂肪酸鹽。 選自研磨性粉體及顆粒中之粒狀體之合計含量於本發明之液體口腔用組合物中較佳為1質量%以下，更佳為0.2質量%以下，進而較佳為0.1質量%以下，又，本發明之液體口腔用組合物較佳為不含有粒狀體。 於本發明之液體口腔用組合物中，成分(A)以外之pH值調整劑(E)，即，選自胺基酸(e-1)、鹼金屬氫氧化物(e-2)、除成分(e-1)以外之有機酸或其鹽(e-3)、除成分(e-2)以外之無機酸或其鹽(e-4)、以及尿素中之pH值調整劑(E)，根據其種類不同具體之情況亦不同，因根據情況不同有使成分(A)具有之緩衝能力降低之虞，有難以進行下述之向特定之鹼性pH值區域調整的可能性，故較佳為限制其含量。即，成分(E)之含量相對於成分(A)之碳酸換算量100質量份，較佳為20質量份以下，更佳為15質量份以下，進而較佳為10質量份以下。再者，由於根據pH值調整劑(E)之種類而情況多少有所不同，故所限制之具體之含量之值亦根據其種類而不同。 作為胺基酸(e-1)，具體而言，可列舉：精胺酸或離胺酸等鹼性胺基酸、天冬胺酸等酸性胺基酸。於該成分(e-1)中，關於鹼性胺基酸之含量，例如為了提高風味及穩定性等，於含有如山梨糖醇般之糖醇之情形時有產生黃變之虞，又，亦有與成分(A)一同形成無用之鹽之虞，因此就有效避免該等之觀點而言，相對於成分(A)之碳酸換算量100質量份，較佳為5質量份以下，更佳為3質量份以下，進而較佳為1質量份以下，又，較佳為不含有鹼性胺基酸。 作為鹼金屬氫氧化物(e-2)，具體而言，可列舉：氫氧化鈉、氫氧化鉀。該成分(e-2)之含量就抑制因pH值變高所致之對風味及為害性之影響之觀點，或抑制因成分(A)之緩衝能力降低所致之著色污垢去除性能之降低之觀點而言，且就容易進行下述之向特定之鹼性pH值區域調整之觀點而言，相對於成分(A)之碳酸換算量100質量份，較佳為10質量份以下，更佳為5質量份以下，進而較佳為3質量份以下，進而更佳為1質量份以下，又，較佳為不含有成分(e-2)。再者，成分(e-2)之含量於調配量明確之情形時為調配量，於調配量不明確之情形時，為根據由組合物中之成分(A)之碳酸換算量所推定之成分(A)之調配量、組合物中之鈉、鉀之量、及pH值進行計算而求出者。 作為有機酸或其鹽(e-3)，具體而言，可列舉：檸檬酸、蘋果酸、乳酸、酒石酸、琥珀酸、乙酸、甘油磷酸、葡萄糖酸、富馬酸、植酸、或該等之鹽。作為該鹽，可列舉：鉀鹽、鈉鹽、銨鹽。 該成分(e-3)之含量於本發明之液體口腔用組合物中，就容易進行下述之向特定之鹼性pH值區域調整之觀點而言，相對於成分(A)之碳酸換算量100質量份，較佳為20質量份以下，更佳為15質量份以下，進而較佳為10質量份以下。又，相對於成分(A)之碳酸換算量100質量份，亦可含有成分(e-3)5質量份以上。 作為無機酸或其鹽(e-4)，具體而言，可列舉正磷酸或其鹽，此外可列舉：選自焦磷酸、三聚磷酸、或六偏磷酸中之縮合磷酸或該等之鹽。進而，作為該等正磷酸、縮合磷酸、及該等之鹽以外之無機酸(e-4)，可列舉：鹽酸、硫酸、硝酸、及磺酸或該等之鹽。 於該成分(e-4)中，正磷酸、縮合磷酸、及該等之鹽之含量就帶來良好之使用感，且確保較高之著色污垢去除性能之觀點而言，相對於成分(A)之碳酸換算量100質量份，較佳為20質量份以下，更佳為15質量份以下。又，正磷酸、縮合磷酸、及該等之鹽之含量就著色污垢或有機污垢之去除性能之觀點而言，相對於成分(A)之碳酸換算量100質量份，較佳為3質量份以上，更佳為5質量份以上，進而較佳為7質量份以上。 又，於成分(e-4)中，鹽酸或硫酸等正磷酸、縮合磷酸、及該等之鹽以外之成分(e-4)之含量，就不阻礙下述之向特定之鹼性pH值區域調整之觀點而言，相對於成分(A)之碳酸換算量100質量份，較佳為5質量份以下，更佳為3質量份以下，進而較佳為1質量份以下，又，較佳為不含有正磷酸、縮合磷酸、及該等之鹽以外之成分(e-4)。 進而可列舉尿素作為其他之pH值調整劑(E)，該尿素之含量就不阻礙下述之向特定之鹼性pH值區域調整之觀點而言，相對於成分(A)之碳酸換算量100質量份，較佳為5質量份以下，更佳為3質量份以下，進而較佳為1質量份以下，又，較佳為不含有尿素。 於本發明之液體口腔用組合物中，非離子界面活性劑(F)就提高著色污垢之去除效果之觀點，及抑制為害性增強之觀點而言，較佳為限制該成分(F)之含有。作為成分(F)之非離子界面活性劑，例如可列舉：選自聚氧乙烯氫化蓖麻油；蔗糖脂肪酸酯；山梨糖醇酐脂肪酸酯；單硬脂酸甘油酯等甘油脂肪酸酯；烷基葡糖苷；單硬脂酸十甘油酯、單肉豆蔻酸十甘油酯等聚甘油脂肪酸酯；聚氧乙烯單烷基(或烯基)醚、聚氧乙烯聚氧丙烯共聚物、聚氧乙烯壬基苯醚等聚氧乙烯烷基苯醚；氧化胺系界面活性劑；椰子油脂肪酸二乙醇醯胺等脂肪酸烷醇醯胺；以及聚乙二醇脂肪酸酯中之1種或2種以上。具體而言，成分(F)之含量於本發明之液體口腔用組合物中，較佳為1質量%以下，更佳為0.5質量%以下，進而較佳為0.2質量%以下，進而更佳為0.1質量%以下，又，本發明之液體口腔用組合物較佳為不含有非離子界面活性劑(F)。 於本發明之液體口腔用組合物中，就保持優異之著色污垢之去除效果，且抑制口腔內之過度之刺激而確保良好之使用感之觀點，及抑制為害性增強之觀點而言，較佳為限制選自過氧化物及二氧化氯中之消毒劑之含有。具體而言，該消毒劑之合計含量於本發明之液體口腔用組合物中，較佳為0.1質量%以下，更佳為0.01質量%以下，又，本發明之液體口腔用組合物較佳為不含有選自過氧化物及二氧化氯中之消毒劑。 本發明之液體口腔用組合物於不阻礙本發明之範圍中，除了上述成分以外，例如可含有上述成分(B)之陰離子界面活性劑及非離子界面活性劑以外之界面活性劑、糖醇、香料、防腐劑、黏結劑、顏料、色素等。 作為上述成分(B)之陰離子界面活性劑及非離子界面活性劑以外之界面活性劑，可列舉：月桂基二甲胺基乙酸甜菜鹼等乙酸甜菜鹼；2-烷基-N-羧甲基-N-羥乙基-N-咪唑鎓甜菜鹼等咪唑鎓甜菜鹼；月桂基磺基甜菜鹼或月桂基羥基磺基甜菜鹼等烷基磺基甜菜鹼；椰子油脂肪醯胺丙基甜菜鹼等椰子油脂肪醯胺烷基甜菜鹼；N-烷基-1-羥乙基咪唑啉甜菜鹼鈉等長鏈烷基咪唑啉甜菜鹼鹽。 作為糖醇，可列舉：山梨糖醇、赤藻糖醇、木糖醇、乳糖醇、異麥芽酮糖醇、麥芽糖醇。 作為香料，只要為表現油溶性之香料即可，例如可列舉：胡椒薄荷油、綠薄荷油、錫蘭肉桂油、大茴香油、桉葉油、冬青油、肉桂油、丁香油、百里香油、鼠尾草油、香紫蘇油、肉豆蔻油、茴香油、檸檬油、甜橙油、薄荷油、小豆蔻油、芫荽籽油、羅勒油、紅橘油、萊姆油、熏衣草油、迷迭香油、薑油、葡萄柚油、月桂油、黃金菊油、葛縷子油、馬郁蘭油、香葉油、檸檬草油、香蜂草油、多香果油、玫瑰草油、乳香油、松針油、卑檸油、橙花油、玫瑰油、茉莉油等天然香料成分，及對該等天然香料成分加工處理而成之香料成分；薄荷腦、胡薄荷醇、香旱芹酮、大茴香腦、桉醚、水楊酸甲酯、桂皮醛、丁香油酚、3-l-薄荷氧基丙烷-1,2-二醇、瑞香草酚、乙酸香茅酯、沈香醇、乙酸沈香酯、香葉草醇、乙酸香葉酯、香茅醇、檸檬烯、薄荷酮、乙酸薄荷酯、N-取代-對薄荷烷-3-甲醯胺、蒎烯、辛醛、檸檬醛、胡薄荷酮、乙酸香芹酯、乙酸二氫香芹酯、茴香醛、苯甲醛、樟腦、內酯、乙酸乙酯、丁酸乙酯、丙酸烯丙基環己酯、鄰胺苯甲酸甲酯、縮水甘油酸乙基甲基苯酯、香蘭素、十一酸內酯、己醛、乙酸丁酯、乙酸異戊酯、己烯醇、二甲基硫醚、甲基環戊烯醇酮、糠醛、三甲基吡、乳酸乙酯、乳酸甲酯、硫代乙酸乙酯等單一香料成分；草莓香料、蘋果香料、香蕉香料、鳳梨香料、葡萄香料、芒果香料、黃油香料、奶香料、水果混合香料、熱帶水果香料等調和香料成分。 作為防腐劑，例如可列舉：對羥基苯甲酸異丁酯、對羥基苯甲酸異丙酯、對羥基苯甲酸乙酯、對羥基苯甲酸丁酯、對羥基苯甲酸丙酯、對羥基苯甲酸甲酯、苯甲酸、苯甲酸鈉、水楊酸甲酯、山梨酸鉀、脫氫乙酸鈉。 作為黏結劑，可列舉：海藻酸鈉、羧甲基纖維素或其鹽、角叉菜膠、三仙膠、聚丙烯酸鈉、羥乙基纖維素、羥丙基纖維素、果膠、黃耆膠、阿拉伯膠、瓜爾膠、刺梧桐樹膠、刺槐豆膠、結冷膠、羅望子膠、車前籽膠、聚乙烯醇、軟骨素硫酸鈉、甲氧基乙烯馬來酸酐共聚物。 本發明之液體口腔用組合物於25℃下之pH值就確保上述成分(A)與成分(B)相輔相成而發揮之較高之著色去除效果之觀點而言，為8.5以上，較佳為9以上，更佳為超過9，進而較佳為9.5以上。又，本發明之液體口腔用組合物於25℃下之pH值就有效抑制為害性之表現，且亦保持良好之風味而確保較高之使用感之觀點而言，為10.5以下，較佳為10以下。並且，本發明之液體口腔用組合物於25℃下之pH值為8.5以上且10.5以下，較佳為9～10，更佳為超過9且10以下，進而較佳為9.5～10。 本發明之液體口腔用組合物就進一步提高本發明之效果之觀點而言，較佳為成分(A)、(B)溶解或分散於成分(C)水之液體口腔用組合物，且較佳為透明之液體口腔用組合物。於本發明中，所謂透明或半透明，係指光程長度10 mm之比色皿時之吸收波長550 nm之光的透過率為80%以上，較佳為透過率90%以上，更佳為透過率95%以上，且有色透明、無色透明均可。透過率可使用光程長度1 mm之石英池，對波長550 nm藉由紫外可見分光光度計，例如島津製作所股份有限公司製造之「UV-2500PC型測量儀」進行測定。 本發明之液體口腔用組合物可應用於漱口劑、液狀潔牙劑、水潔牙劑、口腔噴霧劑、含漱劑等，又，亦可應用於使本發明之液體口腔用組合物含浸於片材劑而得之潔牙片材，又，亦可填充於泡噴出容器而作為呈泡狀噴出之製泡劑，可作為應用於口腔內之液劑使用。 例如，於本發明之液體口腔用組合物為漱口劑或液狀潔牙劑或製泡劑之情形時，較佳為每日於口腔內應用1～5次而使用，例如較佳為藉由於口腔內含漱5 mL～100 mL，更佳為10 mL～50 mL而使用。於口腔內含漱之時間較佳為10秒～5分鐘，更佳為20秒～3分鐘，進而較佳為30秒～1分鐘。又，例如，於將本發明之液體口腔用組合物應用於潔牙片材之情形時，藉由將濕片材纏繞於手指上擦拭牙之表面，可去除牙之污垢。 本發明之液體口腔用組合物能夠藉由包含如下步驟之製造方法獲得，即，按照成分(A)之碳酸鹽以碳酸換算量計為0.2質量%以上3質量%以下、成分(B)之陰離子界面活性劑0.2質量%以上且1.7質量%以下、及成分(C)之水70質量%以上且99.5質量%以下之量進行調配，並且將pH值調整為8.5以上且10.5以下。 成分(A)如上所述，係選自碳酸氫鈉、碳酸鈉、及倍半碳酸鈉中之1種或2種以上之碳酸鹽，只要為按照以碳酸換算量計算之合計量處於上述範圍，且pH值達到上述範圍之方式，調配碳酸氫鈉與碳酸鈉之混合物、或者單獨調配倍半碳酸鈉、或者調配碳酸氫鈉、碳酸鈉、及倍半碳酸鈉之全部中的任一態樣即可。 此外，成分(A)～(C)之調配量分別與上述含量相同，又，視需要所使用之其他成分之調配量亦與上述含量相同。該等成分之調配順序並無特別限制，經過該調配步驟之後經由混合步驟，藉此可獲得本發明之液體口腔用組合物。 關於上述本發明之實施態樣，進而揭示如下之液體口腔用組合物及其製造方法。 [1]一種液體口腔用組合物，其含有如下成分(A)、(B)及(C)： (A)以碳酸換算量計為0.1質量%以上且2質量%以下之選自碳酸氫鈉、碳酸鈉、及倍半碳酸鈉中之1種或2種以上之碳酸鹽、 (B)0.2質量%以上且1.7質量%以下之陰離子界面活性劑、 (C)60質量%以上且99.5質量%以下之水，且 多價金屬陽離子(D)之含量相對於成分(A)未達0.1倍莫耳，成分(A)之碳酸換算量與成分(B)之含量的乘積之值((A)×(B))為0.9以下，並且 25℃下之pH值為8.5以上且10.5以下。 [2]如上述[1]之液體口腔用組合物，其中成分(A)之含量以碳酸(H2
CO3
)換算量計，較佳為0.15質量%以上，更佳為0.18質量%以上，進而較佳為0.20質量%以上，且較佳為1.5質量%以下，更佳為1.3質量%以下，進而較佳為1.0質量%以下，進而更佳為0.6質量%以下。 [3]如上述[1]或[2]之液體口腔用組合物，其中成分(A)為選自碳酸氫鈉與碳酸鈉之混合物、及倍半碳酸鈉中之碳酸鹽。 [4]如上述[1]至[3]中任一項之液體口腔用組合物，其中成分(B)較佳為選自烷基硫酸鈉、醯基麩胺酸鈉、及月桂基甲基牛磺酸鈉中之1種或2種以上，更佳為至少含有烷基硫酸鈉。 [5]如上述[1]至[4]中任一項之液體口腔用組合物，其中成分(B)之含量較佳為0.4質量%以上，更佳為0.5質量%以上，且較佳為1.6質量%以下，更佳為1.5質量%以下，進而較佳為1.2質量%以下，進而更佳為1.0質量%以下。 [6]如上述[1]至[5]中任一項之液體口腔用組合物，其中成分(A)之碳酸換算量與成分(B)之含量的乘積之值((A)×(B))較佳為0.8以下，更佳為0.5以下，進而較佳為0.4以下，且較佳為0.08以上，更佳為0.10以上。 [7]如上述[1]至[6]中任一項之液體口腔用組合物，其中成分(A)之碳酸換算量與成分(B)之含量的合計量較佳為0.5質量%以上，更佳為0.55質量%以上，進而較佳為0.7質量%以上，進而更佳為0.75質量%以上，且較佳為2.4質量%以下，更佳為2.2質量%以下，進而較佳為2.0質量%以下，進而更佳為1.6質量%以下。 [8]如上述[1]至[7]中任一項之液體口腔用組合物，其中成分(C)之含量較佳為65質量%以上，更佳為70質量%以上，且較佳為99.2質量%以下，更佳為99.15質量%以下。 [9]如上述[1]至[8]中任一項之液體口腔用組合物，其中多價金屬陽離子(D)之含量相對於成分(A)之碳酸換算量，較佳為0.02倍莫耳以下。 [10]如上述[1]至[9]中任一項之液體口腔用組合物，其中成分(A)以外之pH值調整劑(E)之含量相對於成分(A)之碳酸換算量100質量份，較佳為20質量份以下，更佳為15質量份以下，進而較佳為10質量份以下。 [11]如上述[1]至[10]中任一項之液體口腔用組合物，其中成分(A)以外之pH值調整劑(E)為選自胺基酸(e-1)、鹼金屬氫氧化物(e-2)、除成分(e-1)以外之有機酸或其鹽(e-3)、除成分(e-2)以外之無機酸或其鹽(e-4)、以及尿素中之pH值調整劑。 [12]如上述[1]至[11]中任一項之液體口腔用組合物，其中於胺基酸(e-1)中，鹼性胺基酸之含量相對於成分(A)之碳酸換算量100質量份，較佳為5質量份以下，更佳為3質量份以下，進而較佳為1質量份以下，或不含有鹼性胺基酸。 [13]如上述[1]至[12]中任一項之液體口腔用組合物，其中鹼金屬氫氧化物(e-2)之含量相對於成分(A)之碳酸換算量100質量份，較佳為10質量份以下，更佳為5質量份以下，進而較佳為3質量份以下，進而更佳為1質量份以下，或不含有成分(e-2)。 [14]如上述[1]至[13]中任一項之液體口腔用組合物，其中有機酸或其鹽(e-3)之含量相對於成分(A)之碳酸換算量100質量份，較佳為20質量份以下，更佳為15質量份以下，進而較佳為10質量份以下，亦可為5質量份以上。 [15]如[1]至[14]中任一項之液體口腔用組合物，其中於無機酸或其鹽(e-4)中，正磷酸、縮合磷酸、及該等之鹽之含量相對於成分(A)之碳酸換算量100質量份，較佳為20質量份以下，更佳為15質量份以下，且較佳為3質量份以上，更佳為5質量份以上，進而較佳為7質量份以上。 [16]如上述[1]至[15]中任一項之液體口腔用組合物，其中非離子界面活性劑(F)之含量較佳為1質量%以下，更佳為0.5質量%以下，進而較佳為0.2質量%以下，進而更佳為0.1質量%以下，或不含有非離子界面活性劑(F)。 [17]如上述[1]至[16]中任一項之液體口腔用組合物，其中選自研磨性粉體及顆粒中之粒狀體之合計含量較佳為1質量%以下，更佳為0.2質量%以下，進而較佳為0.1質量%以下，或不含有粒狀體。 [18]如上述[1]至[17]中任一項之液體口腔用組合物，其中選自過氧化物及二氧化氯中之消毒劑之合計含量於本發明之液體口腔用組合物中，較佳為0.1質量%以下，更佳為0.01質量%以下，或不含有選自過氧化物及二氧化氯中之消毒劑。 [19]如上述[1]至[18]中任一項之液體口腔用組合物，其中25℃下之pH值較佳為9以上，更佳為超過9，進而較佳為9.5以上，且較佳為10以下。 [20]如上述[1]至[19]中任一項之液體口腔用組合物，其係漱口劑、液狀潔牙劑、水潔牙劑、口腔噴霧劑或含漱劑，或係填充於泡噴出容器而呈泡狀噴出之製泡劑。 [21]一種如上述[1]至[19]中任一項之液體口腔用組合物之用途，其用於製造漱口劑、液狀潔牙劑、水潔牙劑、口腔噴霧劑或含漱劑，或用於製造填充於泡噴出容器而呈泡狀噴出之製泡劑。 [22]一種如上述[1]至[19]中任一項之液體口腔用組合物之用途，其用於去除牙齒之著色污垢。 [23]一種如上述[1]至[19]中任一項之液體口腔用組合物之用途，其應用於口腔內。 [24]一種如上述[1]至[19]中任一項之液體口腔用組合物之製造方法，其包括調配如下成分(A)、(B)及(C)之步驟： (A)以碳酸換算量計為0.1質量%以上且2質量%以下之選自碳酸氫鈉、碳酸鈉、及倍半碳酸鈉中之1種或2種以上之碳酸鹽、 (B)0.2質量%以上且1.7質量%以下之陰離子界面活性劑、 (C)70質量%以上且99.5質量%以下之水。 [25]如上述[1]至[19]中任一項之液體口腔用組合物，其係調配如下成分(A)、(B)及(C)而獲得： (A)以碳酸換算量計為0.1質量%以上且2質量%以下之選自碳酸氫鈉、碳酸鈉、及倍半碳酸鈉中之1種或2種以上之碳酸鹽、 (B)0.2質量%以上且1.7質量%以下之陰離子界面活性劑、 (C)70質量%以上且99.5質量%以下之水。 [實施例] 以下基於實施例對本發明進行具體說明。再者，只要表中未特別示出，則各成分之含量表示質量%。 [實施例1～16，比較例1～9] 按照表1～2所示之配方製備各液體口腔用組合物。並且，按照下述方法對著色污垢去除效果、風味、及為害性進行評價。再者，實施例1～16、比較例1～9之液體口腔用組合物其多價金屬陽離子之含量相對於成分(A)為0.02倍莫耳以下。 將結果示於表1～2。 《著色污垢去除效果之評價》 藉由研磨紙(＃400)將試驗所用之HAP板(HOYA(股)，APP-100)研磨後，於0.1 N之鹽酸中浸漬30秒而施行酸處理之後，利用1 mL之水洗淨3次。繼而，將HAP板依序於牛血清白蛋白1%溶液(BSA和光純藥製造)40 mL、人工唾液40 mL、及紅茶溶液40 mL中分別浸漬5分鐘，並進行乾燥。重複該等步驟15次之後，使用分光測色計(CM-700d，柯尼卡美能達公司製造)測定以L*a*b表色系統(孟塞爾表色)表示著色程度時之b*值(浸漬前b*值)。 然後，將所得之HAP板於各液體口腔用組合物中浸漬2分鐘之後，同樣地測定b*值(浸漬後b*值)，按照下述式(X)計算著色污垢之去除率(%)，將比較例1之值作為100，進行指數表示。 去除率(%)＝(浸漬前b*值－浸漬後b*值)/浸漬前b*值×100··· (X) 再者，人工唾液係使用含有氯化鈣(1.0 mM)、磷酸氫鉀(0.9 mM)、HEPES(4-(2-hydroxyethyl)-1-piperazineethanesulfonicacid，4-(2-羥乙基)-1-哌乙磺酸)(2.0 mM)之水溶液且經氫氧化鉀調整為pH值＝7者。紅茶溶液係將6個茶包(日東紅茶)放入300 mL之熱水中5分鐘後取出，並將冷卻至室溫之紅茶溶液過濾後使用。紅茶溶液之過濾使用WHATMAN公司製造之No.1之濾紙。 《風味之評價》 對於將各液體口腔用組合物20 mL於口腔內含漱40秒吐出後於口腔內感覺到之風味，由5名專業官能檢查員按照下述基準進行評價，並經由協商得出評價結果。 A：口味良好 a：略感覺到苦味 B：感覺到苦味 C：感覺到強烈之苦味 《為害性之評價》 對於將各液體口腔用組合物20 mL於口腔內含漱40秒吐出後於牙齦或口腔內黏膜處感覺到之為害性，由5名專業官能檢查員按照下述基準進行評價，並經由協商得出評價結果。 A：完全感覺不到刺激 a：略感覺到刺激 B：感覺到刺激 C：感覺到強烈之刺激 [表1]
[表2]
根據表1～2之結果可知，與不含有成分(B)之比較例1、pH值為8.5以上且10.5以下之範圍外之比較例2～3、成分(B)之含量或成分(A)之碳酸換算量超過上述範圍之比較例4～5、(A)×(B)之值為0.9以上之比較例6及8、使用非離子界面活性劑代替成分(B)之比較例7、成分(A)之碳酸換算量或pH值為上述範圍外之比較例9相比，實施例1～16之液體口腔用組合物同時充分地兼備良好之使用感之賦予效果與優異之著色污垢之去除效果。 [比較例10～11] 按照表3所示之配方製備各潔牙劑。繼而，按照上述方法，對著色污垢去除效果、風味、及為害性進行評價。再者，就使潔牙劑與HAP均勻接觸之觀點、及潔牙劑於口腔內稀釋之觀點而言，藉由經純化水稀釋4倍之具有流動性之液體進行評價。 又，對於25℃下之pH值，亦經純化水稀釋4倍後進行測定。 亦包括上述實施例4之液體口腔用組合物在內，將結果示於表3。 [表3]
根據表3之結果可以理解，只要為潔牙劑，則即便為成分(A)及成分(B)之調配量較多之比較例11之潔牙劑，雖然於風味及為害性上並無問題，但亦無法充分地發揮如實施例1～16之液體口腔用組合物般之較高之著色去除性能。The invention is described in detail below. The liquid oral composition of the present invention contains, as component (A), one or two or more kinds of carbonates selected from the group consisting of sodium hydrogencarbonate, sodium carbonate, and sodium sesquicarbonate. Each of the carbonates has a buffering ability and can also be used as a pH adjusting agent. In the present invention, the components (A) can be selected from the group consisting of sodium hydrogencarbonate, sodium carbonate, and sodium sesquicarbonate. One, more preferably formulated and containing a carbonate selected from the group consisting of sodium hydrogencarbonate, sodium carbonate, and sodium sesquicarbonate. The use of a carbonate selected from the group consisting of sodium hydrogencarbonate, sodium carbonate, and sodium sesquicarbonate uses a mixture of sodium hydrogencarbonate and sodium carbonate, or sodium sesquicarbonate alone, or sodium hydrogencarbonate, sodium carbonate, and Sodium sesquicarbonate is used in any aspect. By using the component (A), the buffering ability is sufficient, and the hydroxide ions are continuously supplied to the oral cavity, and the pH is adjusted to a specific alkaline region as described later, and the feeling of use is good and sufficient. The effect of effectively removing the stained dirt adhering to the tooth surface or the like is exerted. As the component (A), from the viewpoint of improving the effect of removing colored stains, sodium hydrogencarbonate and sodium carbonate are preferably used in combination. The content of the component (A) is carbonic acid (H) in the liquid oral composition of the present invention from the viewpoint of ensuring the effect of removing the colored stain. 2 CO 3 The amount of conversion is 0.1% by mass or more, preferably 0.15% by mass or more, more preferably 0.18% by mass or more, and still more preferably 0.20% by mass or more. In the liquid oral composition of the present invention, the content of the component (A) is controlled to be 2 masses in terms of carbonic acid, from the viewpoint of the damage of the gums or the oral mucosa, and the viewpoint of ensuring the flavor. % or less is preferably 1.5% by mass or less, more preferably 1.3% by mass or less, further preferably 1.0% by mass or less, and still more preferably 0.6% by mass or less. In the liquid oral composition of the present invention, the content of the component (A) is 0.1% by mass or more and 2% by mass or less, preferably 0.15 to 1.5% by mass, more preferably 0.18 to 1.3% by mass. The mass% is more preferably 0.20 to 1.0% by mass, still more preferably 0.20 to 0.6% by mass. The liquid oral composition of the present invention contains 0.2% by mass or more and 1.7% by mass or less of the anionic surfactant as the component (B). By containing the component (B) in an amount, the effect of removing the colored stain obtained by the component (A) can be synergistically improved, and the performance such as damage can be effectively prevented, and a good feeling of use can be maintained. Examples of the component (B) include an alkyl sulfate ester salt such as sodium alkyl sulfate, a mercapto amino acid salt such as sodium thioglycolate or sodium thioglycolate, and a lauryl methyl bovine. N-methyl long-chain sulfonyl taurine sodium salt such as sodium sulfonate, alkyl phosphate such as sodium alkyl phosphate, sulfonated monoglyceride salt of higher fatty acid, fatty acid ester salt of isethionethane, and polyoxygen One or more of ethylene monoalkyl phosphates. Among them, from the viewpoints of a high removal effect of colored stains and a good feeling of use, it is preferably selected from the group consisting of sodium alkyl sulfate, sodium thioglycolate, and sodium lauryl methyl taurate. One type or two or more types, more preferably at least sodium alkyl sulfate, more preferably a combination of sodium alkyl sulfate and other components (B). Specific examples of the sodium alkyl sulfate include sodium alkyl sulfate having a saturated or unsaturated alkyl group having 8 to 18 carbon atoms, and it is preferred from the viewpoints of solubility, manufacturability and feeling of use. It is a sodium alkyl sulfate having a saturated or unsaturated alkyl group having 10 to 14 carbon atoms, more specifically, one or two selected from the group consisting of sodium lauryl sulfate and sodium myristyl sulfate, and further Preferred is sodium lauryl sulfate. In the liquid oral composition of the present invention, the content of the component (B) is 0.2% by mass or more, preferably 0.4% by mass or more, and more preferably 0.5% by mass or more. . In addition, the content of the component (B) is preferably 1.7% by mass or less in the liquid oral composition of the present invention, from the viewpoint of being effective in suppressing damage to the gums or the oral mucosa, and the like. It is preferably 1.6% by mass or less, more preferably 1.5% by mass or less, further preferably 1.2% by mass or less, and still more preferably 1.0% by mass or less. Further, the content of the component (B) is 0.2% by mass or more and 1.7% by mass or less, preferably 0.4 to 1.6% by mass, more preferably 0.5 to 1.5% by mass, even more preferably 0.5 to 1.5% by mass, more preferably in the liquid oral composition of the present invention. It is 0.5 to 1.2% by mass or less, and more preferably 0.5 to 1.0% by mass or less. The value ((A) × (B)) of the product of the amount of the carbonic acid of the component (A) and the content of the component (B) is effective to achieve both the removal effect of the colored stain and the suppression of the damage. From the viewpoint of good feeling of use, it is 0.9 or less, preferably 0.8 or less, more preferably 0.5 or less, still more preferably 0.4 or less, and is preferably 0.08 or more, and more preferably 0.10 or more. Further, the value ((A) × (B)) of the product of the amount of the carbonic acid of the component (A) and the content of the component (B) is 0.9 or less, preferably 0.08 to 0.9, more preferably 0.08 to 0.8, and further It is preferably 0.10 to 0.5, more preferably 0.10 to 0.4. Here, the product of the amount of the carbonic acid equivalent of the component (A) and the content of the component (B) is the product of the numerical value expressed by the mass% of 100% by mass of each composition. The component (A) has a characteristic that the pH of the liquid oral composition exceeds the specific basic region described below or the flavor is lowered as the amount of the component (A) is increased. As the content (B) increases, the content of the component (B) is mainly such that it is easy to be expressed not only in damage, but also in that the flavor is also lost and the feeling of use is lowered. The inventors of the present invention have found that in the liquid oral composition, in order to ensure excellent removal of colored stains and good feeling of use, with reference to various characteristics of the components (A) and (B). In addition, it is very effective to contain the component (A) and the component (B) in the above specific amount, and to increase the value of the product of the above-mentioned contents, at the same time as the effect of removing the excellent stain and the good feeling of use. ((A) × (B)) is within the above specific range. The liquid oral composition of the present invention is preferably 0.5% by mass or more from the viewpoint of the effect of reducing the amount of the component (A) in the amount of the component (B) and the component (B). It is more preferably 0.55% by mass or more, further preferably 0.7% by mass or more, and still more preferably 0.75% by mass or more. In addition, the total amount of the content of the component (A) and the content of the component (B) is effectively suppressed from the viewpoint of the damage of the gums or the oral mucosa, and the viewpoint of maintaining a good flavor. The liquid oral composition is preferably 2.4% by mass or less, more preferably 2.2% by mass or less, further preferably 2.0% by mass or less, and still more preferably 1.6% by mass or less. In addition, the total amount of the amount of the component (A) in the amount of the component (A) and the content of the component (B) is preferably 0.5 to 2.4% by mass, more preferably 0.55 to 2.2% by mass, more preferably 0.55 to 2.2% by mass. It is preferably 0.7 to 2.0% by mass, and more preferably 0.75 to 1.6% by mass. The liquid oral composition of the present invention contains 60% by mass or more and 99.5% by mass or less of water as the component (C). The water of the component (C) in the present invention refers to all the water contained in the liquid oral composition, and includes not only purified water or ion-exchanged water which is formulated into a liquid oral composition, but also includes various formulations. The moisture contained in the ingredients. By containing the water of the component (C), the components can be well dispersed or dissolved, and the liquid oral composition can be well diffused to various corners of the oral cavity during use, thereby exhibiting excellent coloring and staining. Removal. In addition, if the oral composition such as a dentifrice having a water content of less than 60% by mass is easily present in a specific portion of the oral cavity, only a partial effect can be obtained, and the desired result is obtained throughout the entire oral cavity. The viewpoint of the effect, or the viewpoint of obtaining the desired effect throughout the entire oral cavity even if diluted by saliva, is preferably as in the liquid oral composition of the present invention, because the oral cavity contains a certain time. It is easily applied to the entire oral cavity while maintaining the content of each component as much as possible. The content of the component (C) is 60% by mass or more, preferably 65% by mass or more, and more preferably 70% by mass in the liquid oral composition of the present invention, from the viewpoint of dispersing or dissolving the components. the above. Further, the content of the component (C) is 99.5% by mass or less, preferably 99.2% by mass or less, and more preferably 99.15, in the liquid oral composition of the present invention from the viewpoint of ensuring the excellent coloring matter removal effect. Below mass%. Further, the content of the component (C) is 60% by mass or more and 99.5% by mass or less, preferably 65 to 99.2% by mass, and more preferably 70 to 99.15% by mass, based on the liquid oral composition of the present invention. The content of the polyvalent metal cation (D) of the liquid oral composition of the present invention is less than 0.1 times the molar amount with respect to the component (A). In the liquid oral composition of the present invention, the polyvalent metal cation has a tendency to insoluble in the component (A) or the like, or to reduce the effect of removing the colored stain. Therefore, it is necessary to limit the content thereof. The total content of the polyvalent metal cations was measured by ICP (inductively coupled plasma) luminescence analysis (ICP emission analysis apparatus: Perkin Elmer, Optima 5300DV), and the amount of carbonic acid converted to the component (A) was not reached. 0.1 times Moules, preferably 0.02 times Moules or less. Therefore, in the liquid oral composition of the present invention, it is desirable not to contain a component which supplies a polyvalent metal cation such as aluminum, calcium, magnesium, iron, zinc or the like, and may be a non-in addition to the case where it is inevitably mixed. Those containing polyvalent metal cations. Further, the polyvalent metal cation is a component containing a polyvalent metal, and even if it is an insoluble polyvalent metal salt and is present in the composition in the form of a granule, the component (A) is obtained. The tendency of the effect of the present invention is reduced. For example, aluminum ions are supplied to the liquid oral composition even in the case of an abrasive powder such as aluminum hydroxide. Therefore, when the liquid oral composition of the present invention contains a polyvalent metal salt, it is considered that the cation is gradually supplied to the water contained in the liquid oral composition, or because the polyvalent metal salt and the component (A) The component (A) is also adsorbed by the contact, so that the coloring soil removal performance obtained by the component (A) is lowered. In the present specification, the term "granular body" is a general term for abrasive powders and granules, and refers to abrasive powders and granules having an average particle diameter of 5 to 800 μm. In the liquid oral composition of the present invention, the granulated body preferably inhibits the content of the component (A) or the like from being dissolved or the effect of removing the colored stain is lowered. The abrasive powder system is a powder that can function as an abrasive. Specific examples of the abrasive powder include, in addition to the aluminum hydroxide, calcium dihydrogen phosphate, tricalcium phosphate, and insoluble sodium metaphosphate. , magnesium phosphate, calcium carbonate, calcium pyrophosphate, composite aluminum silicate, and the like. The particles are aggregates obtained by granulating a specific material, and examples of the material include light calcium carbonate, heavy calcium carbonate, zeolite, dicalcium phosphate, tricalcium phosphate, and insoluble sodium metaphosphate. , aluminum hydroxide, magnesium phosphate, calcium pyrophosphate, magnesium carbonate, aluminum magnesium niobate, synthetic aluminum citrate, calcium citrate, bentonite, montmorillonite, kaolin, aluminum hydroxide gel, alumina sol, synthetic aluminum carbonate Magnesium, magnesium carbonate, magnesium oxide, and magnesium hydroxide may, for example, be a higher fatty acid salt such as magnesium stearate or calcium stearate. The total content of the granules selected from the abrasive powders and granules is preferably 1% by mass or less, more preferably 0.2% by mass or less, even more preferably 0.1% by mass or less, based on the liquid oral composition of the present invention. Further, the liquid oral composition of the present invention preferably does not contain granules. In the liquid oral composition of the present invention, the pH adjuster (E) other than the component (A), that is, selected from the group consisting of amino acid (e-1) and alkali metal hydroxide (e-2), An organic acid other than the component (e-1) or a salt thereof (e-3), an inorganic acid other than the component (e-2) or a salt thereof (e-4), and a pH adjuster (E) in urea Depending on the type, the specific conditions may vary. Depending on the situation, there is a possibility that the buffering ability of the component (A) is lowered, and it is difficult to adjust to a specific alkaline pH region as described below. Jia is limiting its content. In other words, the content of the component (E) is preferably 20 parts by mass or less, more preferably 15 parts by mass or less, even more preferably 10 parts by mass or less based on 100 parts by mass of the amount of the component (A). In addition, since the case differs depending on the type of the pH adjusting agent (E), the value of the specific content to be limited also varies depending on the type thereof. Specific examples of the amino acid (e-1) include acidic amino acids such as arginine or amide acid, and amino acid such as aspartic acid. In the component (e-1), the content of the basic amino acid is, for example, in order to improve the flavor and stability, and the like, in the case of containing a sugar alcohol such as sorbitol, yellowing is caused, and In addition, it is preferable that the amount of the carbonic acid equivalent of the component (A) is 100 parts by mass, preferably 5 parts by mass or less, more preferably from the viewpoint of effectively avoiding such a viewpoint. It is 3 parts by mass or less, more preferably 1 part by mass or less, and further preferably contains no basic amino acid. Specific examples of the alkali metal hydroxide (e-2) include sodium hydroxide and potassium hydroxide. The content of the component (e-2) suppresses the influence on the flavor and the harmfulness due to the increase in the pH value, or suppresses the decrease in the stain removal performance due to the decrease in the buffering ability of the component (A). From the viewpoint of the above-described adjustment to a specific alkaline pH region, it is preferably 10 parts by mass or less, more preferably 10 parts by mass or less, based on 100 parts by mass of the carbonic acid equivalent amount of the component (A). It is 5 parts by mass or less, more preferably 3 parts by mass or less, still more preferably 1 part by mass or less, and further preferably contains no component (e-2). In addition, the content of the component (e-2) is a blending amount when the blending amount is clear, and is a component estimated based on the amount of carbonic acid converted from the component (A) in the composition when the blending amount is unclear. The amount of (A), the amount of sodium and potassium in the composition, and the pH are calculated. Specific examples of the organic acid or the salt thereof (e-3) include citric acid, malic acid, lactic acid, tartaric acid, succinic acid, acetic acid, glycerophosphoric acid, gluconic acid, fumaric acid, phytic acid, or the like. Salt. Examples of the salt include a potassium salt, a sodium salt, and an ammonium salt. The content of the component (e-3) in the liquid oral composition of the present invention is easy to carry out the following adjustment to a specific alkaline pH region, and the amount of carbonic acid converted relative to the component (A) 100 parts by mass, preferably 20 parts by mass or less, more preferably 15 parts by mass or less, further preferably 10 parts by mass or less. In addition, the component (e-3) may be contained in an amount of not less than 5 parts by mass based on 100 parts by mass of the amount of the carbonic acid of the component (A). Specific examples of the inorganic acid or the salt thereof (e-4) include orthophosphoric acid or a salt thereof, and examples thereof include a condensed phosphoric acid selected from pyrophosphoric acid, tripolyphosphoric acid, or hexametaphosphoric acid or a salt thereof. . Further, examples of the mineral acid (e-4) other than the orthophosphoric acid, the condensed phosphoric acid, and the salts thereof include hydrochloric acid, sulfuric acid, nitric acid, and sulfonic acid or the like. In the component (e-4), the content of orthophosphoric acid, condensed phosphoric acid, and the like of the salt gives a good feeling of use, and the viewpoint of ensuring high stain removal performance is relative to the component (A). The amount of carbonic acid converted is 100 parts by mass, preferably 20 parts by mass or less, more preferably 15 parts by mass or less. In addition, the content of the orthophosphoric acid, the condensed phosphoric acid, and the salt thereof is preferably 3 parts by mass or more based on 100 parts by mass of the carbonic acid equivalent amount of the component (A) from the viewpoint of the removal performance of the colored soil or the organic soil. More preferably, it is 5 mass parts or more, More preferably, it is 7 mass parts or more. Further, in the component (e-4), the content of the orthophosphoric acid such as hydrochloric acid or sulfuric acid, the condensed phosphoric acid, and the component (e-4) other than the salt does not inhibit the specific alkaline pH described below. From the viewpoint of the area adjustment, the amount of the carbonic acid equivalent of the component (A) is preferably 5 parts by mass or less, more preferably 3 parts by mass or less, still more preferably 1 part by mass or less, and further preferably It is a component (e-4) which does not contain orthophosphoric acid, condensed phosphoric acid, and these salts. Further, urea is used as the other pH adjuster (E), and the content of the urea does not inhibit the following adjustment to the specific alkaline pH region, and the amount of carbonic acid converted to the component (A) is 100. The mass part is preferably 5 parts by mass or less, more preferably 3 parts by mass or less, still more preferably 1 part by mass or less, and further preferably contains no urea. In the liquid oral composition of the present invention, the nonionic surfactant (F) preferably limits the content of the component (F) from the viewpoint of enhancing the effect of removing the stained stain and suppressing the increase in damage. . Examples of the nonionic surfactant of the component (F) include a polyglycerin hydrogenated castor oil; a sucrose fatty acid ester; a sorbitan fatty acid ester; and a glycerin fatty acid ester such as glyceryl monostearate; Alkyl glucoside; polyglycerol fatty acid ester such as decaglyceryl monostearate, decaglyceryl monomyristate; polyoxyethylene monoalkyl (or alkenyl) ether, polyoxyethylene polyoxypropylene copolymer, poly a polyoxyethylene alkyl phenyl ether such as oxyethylene phenyl phenyl ether; an amine oxide surfactant; a fatty acid alkanolamine such as coconut oil fatty acid diethanol decylamine; and 1 or 2 of a polyethylene glycol fatty acid ester More than one species. Specifically, the content of the component (F) is preferably 1% by mass or less, more preferably 0.5% by mass or less, still more preferably 0.2% by mass or less, and even more preferably 0.2% by mass or less. Further, the liquid oral composition of the present invention preferably contains no nonionic surfactant (F). In the liquid oral composition of the present invention, it is preferred to maintain an excellent stain-removing effect, to suppress excessive irritation in the oral cavity, to ensure a good feeling of use, and to suppress the increase in damage. To limit the content of disinfectants selected from peroxides and chlorine dioxide. Specifically, the total content of the disinfectant is preferably 0.1% by mass or less, more preferably 0.01% by mass or less, based on the liquid oral composition of the present invention, and the liquid oral composition of the present invention is preferably Does not contain a disinfectant selected from peroxides and chlorine dioxide. The liquid oral composition of the present invention may contain, in addition to the above components, an anionic surfactant other than the above component (B), a surfactant other than the nonionic surfactant, a sugar alcohol, and the like, in addition to the above components. Spices, preservatives, binders, pigments, pigments, etc. Examples of the surfactant other than the anionic surfactant and the nonionic surfactant of the component (B) include acetic acid betaine such as lauryl dimethylaminoacetate betaine; 2-alkyl-N-carboxymethyl group; -N-hydroxyethyl-N-imidazolium betaine such as imidazolium betaine; alkylsulfobetaine such as lauryl sulfobetaine or lauryl hydroxysultaine; coconut fatty amidamine propyl betaine Such as coconut oil fatty guanamine alkyl betaines; N-alkyl-1-hydroxyethyl imidazoline betaine sodium and other long-chain alkyl imidazolinium betaine. Examples of the sugar alcohol include sorbitol, erythritol, xylitol, lactitol, isomalt, and maltitol. The flavoring agent may be any oil-soluble flavoring agent, and examples thereof include peppermint oil, spearmint oil, ceylon cinnamon oil, anise oil, eucalyptus oil, wintergreen oil, cinnamon oil, clove oil, and thyme oil. Sage oil, sage oil, nutmeg oil, fennel oil, lemon oil, orange oil, peppermint oil, cardamom oil, eucalyptus seed oil, basil oil, red orange oil, lime oil, lavender oil, Rosemary oil, ginger oil, grapefruit oil, bay oil, golden chrysanthemum oil, caraway oil, marjoram oil, geranium oil, lemon grass oil, lemon balm oil, allspice oil, rose grass oil, mastic oil Natural flavoring ingredients such as pine needle oil, lime oil, neroli oil, rose oil, jasmine oil, and flavoring ingredients processed from such natural flavoring ingredients; menthol, menthol, fragrant celery, large Fennel brain, oxime ether, methyl salicylate, cinnamaldehyde, eugenol, 3-l-menthylpropane-1,2-diol, thymol, citronellyl acetate, linalool, acetic acid , geranyl alcohol, geranyl acetate, citronellol, limonene, menthone, menthyl acetate N-substituted-p-menthan-3-carboxamide, decene, octanal, citral, humulen, carvone acetate, dihydrocarvyl acetate, anisaldehyde, benzaldehyde, camphor, lactone, Ethyl acetate, ethyl butyrate, allyl cyclohexyl propionate, methyl ortho-benzoate, ethyl methyl phenyl glyoxylate, vanillin, undecanoate, hexanal, butyl acetate , isoamyl acetate, hexenol, dimethyl sulfide, methylcyclopentenolone, furfural, trimethylpyridinium , single ester ingredients such as ethyl lactate, methyl lactate, ethyl thioacetate; strawberry, apple, banana, pineapple, grape, mango, butter, milk, fruit, tropical fruit Equally blend the spice ingredients. Examples of the preservative include isobutyl p-hydroxybenzoate, isopropyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, butyl p-hydroxybenzoate, propyl p-hydroxybenzoate, and p-hydroxybenzoate. Ester, benzoic acid, sodium benzoate, methyl salicylate, potassium sorbate, sodium dehydroacetate. Examples of the binder include sodium alginate, carboxymethylcellulose or a salt thereof, carrageenan, sanzan gum, sodium polyacrylate, hydroxyethylcellulose, hydroxypropylcellulose, pectin, and scutellaria. Gum, gum arabic, guar gum, karaya gum, locust bean gum, gellan gum, tamarind gum, psyllium seed gum, polyvinyl alcohol, sodium chondroitin sulfate, methoxyethylene maleic anhydride copolymer. The liquid oral composition of the present invention has a pH value at 25 ° C of 8.5 or more, preferably 9 from the viewpoint of ensuring that the component (A) and the component (B) complement each other and exhibit a high color removal effect. More preferably, it is more than 9, more preferably 9.5 or more. Further, the liquid oral composition of the present invention has a pH at 25 ° C which is effective in suppressing the performance of harmful properties, and also maintains a good flavor and ensures a high feeling of use, and is preferably 10.5 or less. 10 or less. Further, the liquid oral composition of the present invention has a pH of 8.5 or more and 10.5 or less at 25 ° C, preferably 9 to 10, more preferably more than 9 and 10 or less, still more preferably 9.5 to 10. The liquid oral composition of the present invention is preferably a liquid oral composition in which the components (A) and (B) are dissolved or dispersed in the component (C) from the viewpoint of further improving the effects of the present invention, and is preferably. It is a transparent liquid oral composition. In the present invention, the term "transparent or translucent" means that the transmittance of light having an absorption wavelength of 550 nm in a cuvette having an optical path length of 10 mm is 80% or more, preferably a transmittance of 90% or more, more preferably The transmittance is 95% or more, and the color is transparent, colorless and transparent. The transmittance can be measured using a quartz cell having an optical path length of 1 mm and a wavelength of 550 nm by an ultraviolet-visible spectrophotometer such as a "UV-2500PC type measuring instrument" manufactured by Shimadzu Corporation. The liquid oral composition of the present invention can be applied to a mouthwash, a liquid dentifrice, a water dentifrice, an oral spray, an expectorant, etc., and can also be applied to the liquid oral composition of the present invention. The cleaning sheet obtained by impregnating the sheet material may be filled in a bubble ejecting container and used as a foaming agent which is ejected in a bubble form, and can be used as a liquid agent for application in the oral cavity. For example, when the liquid oral composition of the present invention is a mouthwash or a liquid dentifrice or a foaming agent, it is preferably used one to five times a day in the oral cavity, for example, preferably borrowed. It is used in the oral cavity containing 5 mL to 100 mL, more preferably 10 mL to 50 mL. The time for bubbling in the oral cavity is preferably from 10 seconds to 5 minutes, more preferably from 20 seconds to 3 minutes, still more preferably from 30 seconds to 1 minute. Further, for example, when the liquid oral composition of the present invention is applied to a dental prosthetic sheet, the dirt of the tooth can be removed by winding the wet sheet around the surface of the tooth by rubbing the finger. The liquid oral composition of the present invention can be obtained by a production method comprising the following steps: that is, the anion of the component (B) is 0.2% by mass or more and 3% by mass or less based on the amount of the carbonate of the component (A). The amount of the surfactant is 0.2% by mass or more and 1.7% by mass or less, and the amount of the component (C) is 70% by mass or more and 99.5% by mass or less, and the pH is adjusted to 8.5 or more and 10.5 or less. In the above, the component (A) is one or more selected from the group consisting of sodium hydrogencarbonate, sodium carbonate, and sodium sesquicarbonate, and is in the above range as long as the total amount calculated based on the amount of carbonic acid is And the pH value is in the above range, or a mixture of sodium hydrogencarbonate and sodium carbonate, or a sodium sesquicarbonate alone, or all of sodium hydrogencarbonate, sodium carbonate, and sodium sesquicarbonate is prepared. can. Further, the blending amounts of the components (A) to (C) are the same as those described above, and the blending amounts of the other components used as necessary are also the same as those described above. The order of blending the components is not particularly limited, and the liquid oral composition of the present invention can be obtained through the mixing step after the blending step. The liquid oral composition and the method for producing the same are disclosed in the above embodiment of the present invention. [1] A liquid oral composition comprising the following components (A), (B), and (C): (A) in an amount of 0.1% by mass or more and 2% by mass or less based on the amount of carbonic acid, selected from sodium hydrogencarbonate One or two or more kinds of carbonates of sodium carbonate and sodium sesquicarbonate, (B) 0.2% by mass or more and 1.7% by mass or less of an anionic surfactant, (C) 60% by mass or more and 99.5% by mass The following water, and the content of the polyvalent metal cation (D) is less than 0.1 times the molar amount of the component (A), and the value of the product of the amount of the carbonic acid of the component (A) and the content of the component (B) ((A) ×(B)) is 0.9 or less, and the pH at 25 ° C is 8.5 or more and 10.5 or less. [2] The liquid oral composition according to [1] above, wherein the content of the component (A) is carbonic acid (H) 2 CO 3 The conversion amount is preferably 0.15% by mass or more, more preferably 0.18% by mass or more, further preferably 0.20% by mass or more, and preferably 1.5% by mass or less, more preferably 1.3% by mass or less, and further preferably It is 1.0% by mass or less, and more preferably 0.6% by mass or less. [3] The liquid oral composition according to the above [1] or [2] wherein the component (A) is a carbonate selected from the group consisting of sodium hydrogencarbonate and sodium carbonate, and sodium sesquicarbonate. [4] The liquid oral composition according to any one of the above [1] to [3] wherein the component (B) is preferably selected from the group consisting of sodium alkyl sulfate, sodium thioglycolate, and lauryl methyl group. One or more of sodium taurine, more preferably at least sodium alkyl sulfate. [5] The liquid oral composition according to any one of the above [1] to [4] wherein the content of the component (B) is preferably 0.4% by mass or more, more preferably 0.5% by mass or more, and preferably 1.6% by mass or less, more preferably 1.5% by mass or less, further preferably 1.2% by mass or less, and still more preferably 1.0% by mass or less. [6] The liquid oral composition according to any one of the above [1] to [5] wherein the value of the product of the amount of the carbonic acid of the component (A) and the content of the component (B) ((A) × (B) )) is preferably 0.8 or less, more preferably 0.5 or less, still more preferably 0.4 or less, and is preferably 0.08 or more, and more preferably 0.10 or more. [7] The liquid oral composition according to any one of the above [1] to [6], wherein the total amount of the content of the component (A) and the content of the component (B) is preferably 0.5% by mass or more. It is more preferably 0.55% by mass or more, further preferably 0.7% by mass or more, further preferably 0.75% by mass or more, and more preferably 2.4% by mass or less, more preferably 2.2% by mass or less, still more preferably 2.0% by mass. Hereinafter, it is more preferably 1.6% by mass or less. [8] The liquid oral composition according to any one of the above [1] to [7] wherein the content of the component (C) is preferably 65 mass% or more, more preferably 70 mass% or more, and preferably 99.2% by mass or less, more preferably 99.15% by mass or less. [9] The liquid oral composition according to any one of the above [1] to [8] wherein the content of the polyvalent metal cation (D) is preferably 0.02 times the amount of the carbonic acid of the component (A). Below the ear. [10] The liquid oral composition according to any one of the above [1] to [9] wherein the content of the pH adjuster (E) other than the component (A) is 100% relative to the amount of the component (A). The mass part is preferably 20 parts by mass or less, more preferably 15 parts by mass or less, still more preferably 10 parts by mass or less. [11] The liquid oral composition according to any one of the above [1] to [10] wherein the pH adjusting agent (E) other than the component (A) is selected from the group consisting of amino acids (e-1) and alkalis. a metal hydroxide (e-2), an organic acid other than the component (e-1) or a salt thereof (e-3), an inorganic acid other than the component (e-2) or a salt thereof (e-4), And a pH adjuster in urea. [12] The liquid oral composition according to any one of the above [1] to [11] wherein, in the amino acid (e-1), the content of the basic amino acid is relative to the carbonic acid of the component (A) The amount of conversion is preferably 5 parts by mass or less, more preferably 3 parts by mass or less, still more preferably 1 part by mass or less, or no basic amino acid. [13] The liquid oral composition according to any one of the above [1] to [12] wherein the content of the alkali metal hydroxide (e-2) is 100 parts by mass relative to the amount of carbonic acid of the component (A). It is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, still more preferably 3 parts by mass or less, still more preferably 1 part by mass or less, or no component (e-2). [14] The liquid oral composition according to any one of the above [1] to [13] wherein the content of the organic acid or the salt thereof (e-3) is 100 parts by mass relative to the amount of the carbonic acid of the component (A). It is preferably 20 parts by mass or less, more preferably 15 parts by mass or less, further preferably 10 parts by mass or less, and may be 5 parts by mass or more. [15] The liquid oral composition according to any one of [1] to [14] wherein the content of orthophosphoric acid, condensed phosphoric acid, and the like in the inorganic acid or its salt (e-4) is relatively The amount of carbonic acid in terms of the component (A) is preferably 100 parts by mass or less, more preferably 15 parts by mass or less, still more preferably 3 parts by mass or more, still more preferably 5 parts by mass or more, and still more preferably 5 parts by mass or more. 7 parts by mass or more. [16] The liquid oral composition according to any one of the above [1] to [15] wherein the content of the nonionic surfactant (F) is preferably 1% by mass or less, more preferably 0.5% by mass or less. Further, it is preferably 0.2% by mass or less, more preferably 0.1% by mass or less, or no nonionic surfactant (F). [17] The liquid oral composition according to any one of the above [1] to [16], wherein a total content of the granules selected from the group consisting of abrasive powders and granules is preferably 1% by mass or less, more preferably It is 0.2% by mass or less, more preferably 0.1% by mass or less, or no particulate matter. [18] The liquid oral composition according to any one of the above [1] to [17] wherein the total content of the disinfectant selected from the group consisting of peroxide and chlorine dioxide is in the liquid oral composition of the present invention. It is preferably 0.1% by mass or less, more preferably 0.01% by mass or less, or no disinfectant selected from the group consisting of peroxides and chlorine dioxide. [19] The liquid oral composition according to any one of the above [1] to [18] wherein the pH at 25 ° C is preferably 9 or more, more preferably more than 9, more preferably 9.5 or more, and It is preferably 10 or less. [20] The liquid oral composition according to any one of the above [1] to [19], which is a mouthwash, a liquid dentifrice, a water dentifrice, an oral spray or an expectorant, or a A foaming agent which is filled in a bubble ejecting container and ejected in a bubble form. [21] The use of the liquid oral composition according to any one of the above [1] to [19], which is used for the manufacture of a mouthwash, a liquid dentifrice, a water dentifrice, an oral spray or a An elixir, or a foaming agent for foaming in a bubble ejecting container. [22] Use of the liquid oral composition according to any one of the above [1] to [19] for removing colored stains of teeth. [23] Use of the liquid oral composition according to any one of the above [1] to [19], which is applied to the oral cavity. [24] A method for producing a liquid oral composition according to any one of the above [1] to [19], which comprises the steps of formulating the following components (A), (B) and (C): (A) In the amount of 0.1% by mass or more and 2% by mass or less, one or two or more kinds of carbonates selected from the group consisting of sodium hydrogencarbonate, sodium carbonate, and sodium sesquicarbonate, and (B) 0.2% by mass or more and 1.7. An anionic surfactant having a mass % or less and (C) 70% by mass or more and 99.5% by mass or less of water. [25] The liquid oral composition according to any one of the above [1] to [19], which is obtained by blending the following components (A), (B) and (C): (A) in terms of carbonic acid 0.1% by mass or more and 2% by mass or less of one or more kinds of carbonates selected from the group consisting of sodium hydrogencarbonate, sodium carbonate, and sodium sesquicarbonate, and (B) 0.2% by mass or more and 1.7% by mass or less An anionic surfactant, (C) 70% by mass or more and 99.5% by mass or less of water. [Examples] Hereinafter, the present invention will be specifically described based on examples. Further, as long as it is not particularly shown in the table, the content of each component represents mass%. [Examples 1 to 16, Comparative Examples 1 to 9] Each of the liquid oral compositions was prepared in accordance with the formulations shown in Tables 1 and 2. Further, the coloring soil removal effect, flavor, and damage were evaluated by the following methods. Further, in the liquid oral compositions of Examples 1 to 16 and Comparative Examples 1 to 9, the content of the polyvalent metal cation was 0.02 times or less based on the component (A). The results are shown in Tables 1 and 2. <<Evaluation of Coloring Soil Removal Effect>> The HAP sheet (HOYA (APP), APP-100) used in the test was ground by a grinding paper (#400), and then immersed in 0.1 N hydrochloric acid for 30 seconds to carry out an acid treatment. Wash 3 times with 1 mL of water. Then, the HAP plate was immersed for 10 minutes in a bovine serum albumin 1% solution (manufactured by BSA and Wako Pure Chemical Industries, Ltd.), 40 mL of artificial saliva, and 40 mL of a black tea solution, respectively, and dried. After repeating these steps 15 times, b* was used to determine the degree of coloration by the L*a*b color system (Mengsell color) using a spectrophotometer (CM-700d, manufactured by Konica Minolta Co., Ltd.). Value (b* value before immersion). Then, the obtained HAP sheet was immersed in each liquid oral composition for 2 minutes, and then the b* value (b* value after immersion) was measured in the same manner, and the removal rate (%) of the colored stain was calculated according to the following formula (X). The value of Comparative Example 1 was taken as 100, and the index was expressed. Removal rate (%) = (b* value before immersion - b* value after immersion) / b* value before immersion × 100 (X) Further, artificial saliva system contains calcium chloride (1.0 mM), phosphoric acid Potassium hydrogen (0.9 mM), HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid, 4-(2-hydroxyethyl)-1-piper An aqueous solution of ethanesulfonic acid) (2.0 mM) was adjusted to pH = 7 by potassium hydroxide. In the black tea solution, 6 tea bags (Nitto black tea) were placed in 300 mL of hot water for 5 minutes, and then taken out, and the black tea solution cooled to room temperature was filtered and used. The filter of the black tea solution was filtered using No. 1 manufactured by WHATMAN. "Evaluation of Flavor" The taste was felt in the oral cavity after 20 mL of each liquid oral composition was sprinkled in the oral cavity for 40 seconds, and was evaluated by five professional inspectors according to the following criteria. The evaluation results. A: Good taste a: slightly bitter taste B: feeling bitterness C: feeling strong bitterness "evaluation of harm" For each liquid oral composition 20 mL was spit in the mouth for 40 seconds and then spit out in the gums or The oral mucosa felt harmful, and was evaluated by five professional inspectors according to the following criteria, and the evaluation results were obtained through negotiation. A: I feel no stimulation at all. a: I feel a little irritated B: I feel stimulating C: I feel strong stimuli [Table 1] [Table 2] According to the results of Tables 1 and 2, the content or composition (A) of Comparative Examples 2 to 3 and Component (B) outside the range of pH 8.5 or more and 10.5 or less were compared with Comparative Example 1 containing no component (B). Comparative Examples 4 to 5 in which the amount of carbonic acid converted exceeds the above range, Comparative Examples 6 and 8 in which the value of (A) × (B) is 0.9 or more, and Comparative Example 7 and the component in which the nonionic surfactant is used instead of the component (B) In the liquid oral composition of the examples (1), the liquid oral cavity composition of the examples 1 to 16 was sufficiently provided with a good feeling of use and excellent removal of colored stains, as compared with the comparative example 9 in which the amount of the carbonic acid or the pH was outside the above range. effect. [Comparative Examples 10 to 11] Each of the dentifrice was prepared in accordance with the formulation shown in Table 3. Then, the coloring soil removal effect, flavor, and damage were evaluated in accordance with the above method. Further, from the viewpoint of uniformly contacting the dentifrice with HAP and diluting the dentifrice in the oral cavity, the liquid having a fluidity diluted four times with purified water was used for evaluation. Further, the pH at 25 ° C was also diluted 4 times with purified water and then measured. The liquid oral composition of the above Example 4 was also included, and the results are shown in Table 3. [table 3] According to the results of Table 3, as long as it is a dentifrice, the dentifrice of Comparative Example 11 having a large amount of the component (A) and the component (B) has no problem in flavor and damage. However, it was not possible to sufficiently exhibit the high color removal performance as in the liquid oral compositions of Examples 1 to 16.