JP6688072B2 - Liquid oral composition - Google Patents

Description

  The present invention relates to liquid oral compositions.

  BACKGROUND ART Conventionally, a liquid composition for oral cavity has been developed which can exhibit various properties such as an effect of removing plaque or tartar attached to a tooth surface, an effect of preventing dental caries, an effect of removing colored stains, and the like. For example, Patent Document 1 discloses an alkaline mouthwash having a pH of 8 or more and 12 or less, and such a detergent exhibits a high biofilm removal effect. Thus, in the alkaline region, the cleaning performance in the oral cavity such as removal of plaque or tartar and removal of biofilm can be enhanced.

  On the other hand, when blending a fragrance into a liquid oral composition, a nonionic surfactant such as polyoxyethylene hydrogenated castor oil is generally used to accelerate the dissolution or dispersion of the fragrance. For example, Patent Document 2 discloses a foamy oral composition containing an amphoteric surfactant such as an imidazolinium betaine type in addition to the nonionic surfactant and the fragrance. Further, Patent Document 3 discloses a foamy oral composition containing a carboxylic acid type amphoteric surfactant and the like, and also describes adjusting the pH to a range of 3 to 9.

JP, 2008-1657, A JP-A-11-130647 JP, 10-87457, A

  However, in nonionic surfactants such as polyoxyethylene hydrogenated castor oil, it is known that the ester bond is hydrolyzed in the alkaline region, and the surfactant having a polyoxyethylene chain is not dissolved. Not only is it known to be difficult, but the flavor may be reduced. Therefore, in order to increase the content of the perfume while adjusting the liquid oral composition to the alkaline region in order to enhance the cleaning performance in the oral cavity, in the compositions of Patent Documents 2 to 3 described above, all of the perfume are perfume. Since the study on the quantitative relationship between the surfactants used in combination with the above is insufficient, the stability of the nonionic surfactant is impaired, and it becomes difficult to dissolve or disperse the fragrance well, and there is still room for improvement.

  Therefore, the present invention relates to a liquid oral composition capable of containing a fragrance in a stable and sufficient amount in an alkaline region where the cleaning performance is enhanced.

  Therefore, the present inventors have made various studies, and while using a specific amount ratio of the fragrance and the amphoteric surfactant, by using the nonionic surfactant in a specific amount with respect to the amphoteric surfactant, in the alkaline region Even if it exists, it has been found that a liquid oral composition capable of stably containing a sufficient amount of perfume can be obtained.

That is, the present invention provides the following components (A), (B), and (C):
(A) Amphoteric surfactant,
(B) Perfume 0.2 mass% or more and 1.5 mass% or less (b-1) only, or perfume 0.2 mass% or more and 1.5 mass% or less (b-1), triclosan, isopropylmethylphenol, β-glycyrrhetinic acid, and one or more oil-soluble medicinal components (b-2) selected from azulene,
(C) Water contains 55% by mass or more and 98% by mass or less, the content of the nonionic surfactant is less than 1 time the content of the component (A), and the components (b-1) and (A) In the case where the mass ratio ((b-1) / (A)) is 0.1 or more and 1.7 or less and the component (B) contains the component (b-2), The present invention relates to a liquid oral composition having a mass ratio ((b-2) / (A)) of component (A) of 0.005 or more and 0.2 or less and a pH at 25 ° C of 8 or more and 11 or less.

  According to the liquid oral composition of the present invention, a sufficient amount of fragrance can be stably contained from immediately after production to after low-temperature storage even in an alkaline region where the pH at 25 ° C. is 8 or more and 11 or less. it can. Further, it is possible to contain a specific oil-soluble medicinal component while ensuring such good stability, and it is possible to act a desired medicinal effect, and also to impart a transparent or translucent appearance. It is possible.

Hereinafter, the present invention will be described in detail.
The liquid composition for oral cavity of the present invention contains an amphoteric surfactant as the component (A). Since the component (A) contains the component (A) and the component (A) and the nonionic surfactant or the component (B) have a specific quantitative relationship as described below, the component can be used immediately after production until after low temperature storage. High stability can be secured while satisfactorily dissolving or dispersing (B) in a sufficient amount.

  As the amphoteric surfactant of the component (A), betaine acetate such as lauryldimethylaminoacetic acid betaine; imidazolinium betaine such as 2-alkyl-N-carboxymethyl-N-hydroxyethyl-N-imidazolium betaine; laurylsulfo 1 selected from alkylsulfobetaines such as betaine and lauryl hydroxysulfobetaine; coconut oil fatty acid amide alkylbetaines such as coconut oil fatty acid amide propyl betaine; long-chain alkylimidazoline betaine salts such as N-alkyl-1-hydroxyethylimidazoline betaine sodium Or two or more species. Among them, from the viewpoint of effectively suppressing the generation of precipitates at low temperatures, and from the viewpoint of feeling of use, one or more selected from coconut oil fatty acid amide alkylbetaine and alkylsulfobetaine are preferable, and coconut oil Fatty acid amide alkyl betaine is more preferable, coconut oil fatty acid amide alkyl betaine in which the alkyl has 2 to 5 carbon atoms is further preferable, and coconut oil fatty acid amide propyl betaine is even more preferable.

  The content of the component (A) is the liquid oral composition of the present invention from the viewpoint of satisfactorily dissolving or dispersing the fragrance even in a liquid oral composition having an alkaline pH in which the content of the nonionic surfactant is limited. It is preferably 0.2% by mass or more, and more preferably 0.3% by mass from the viewpoint of effectively suppressing the generation of precipitates at low temperature and maintaining high stability even after storage at low temperature. % Or more, and more preferably 0.4% by mass or more. Further, the content of the component (A) is preferably 1.5% by mass or less, more preferably 1.2% by mass in the composition for liquid oral cavity of the present invention, from the viewpoint of ensuring a good feeling in use. % Or less, and more preferably 1% by mass or less. The content of the component (A) in the liquid oral composition of the present invention is preferably 0.2 to 1.5% by mass, more preferably 0.3 to 1.2% by mass. , And more preferably 0.4 to 1% by mass.

  The liquid oral composition of the present invention contains, as the component (B), only 0.2% by mass or more and 1.5% by mass or less (b-1) of a fragrance, or 0.2% by mass or more and 1% of a fragrance. 0.5 mass% or less (b-1) and one or more oil-soluble medicinal components (b-2) selected from triclosan, isopropylmethylphenol, β-glycyrrhetinic acid, and azulene are contained. That is, in the liquid composition for oral cavity of the present invention, the fragrance of the component (b-1) is a component described below regardless of whether it contains the component (b-2) which is a specific oil-soluble medicinal component. In combination with having a specific mass ratio between (b-1) and component (A), the content is always as high as 0.2% by mass or more and 1.5% by mass or less, but is well dissolved or dispersed. is doing.

  Examples of the fragrance (b-1) are peppermint oil, spearmint oil, cinnamon oil, anise oil, eucalyptus oil, wintergreen oil, cassia oil, clove oil, thyme oil, sage oil, sage clary oil, nutmeg oil, funnel oil, Lemon oil, orange oil, peppermint oil, cardamom oil, coriander oil, basil oil, mandarin oil, lime oil, lavender oil, rosemary oil, ginger oil, grapefruit oil, laurel oil, chamomile oil, caraway oil, marjoram oil. Processing natural fragrance ingredients such as bay oil, lemongrass oil, lemon balm oil, pimento berry oil, palmarosa oil, olibanum oil, pine needle oil, petiglene oil, neroli oil, rose oil, jasmine oil, and these natural fragrance ingredients Fragrance ingredients: menthol, pretol, carvone, rape , Cineol, methyl salicylate, cinnamic aldehyde, eugenol, 3-1-menthoxypropane-1,2-diol, thymol, citronellyl acetate, linalool, linalyl acetate, geraniol, geranyl acetate, citronellol, limonene, menthone, Menthyl acetate, N-substituted paramenthane-3-carboxamide, pinene, octyl aldehyde, citral, pulegone, carbyl acetate, dihydrocarbyl acetate, anisaldehyde, benzaldehyde, camphor, lactone, ethyl acetate, ethyl butyrate, allyl cyclohexyl propio Nate, methyl anthranilate, ethylmethylphenylglycidate, vanillin, undecalactone, hexanal, butyl acetate Fragrance ingredients such as isoamyl acetate, hexenol, dimethyl sulfide, cyclotene, furfural, trimethylpyrazine, ethyl lactate, methyl lactate, ethyl thioacetate; strawberry flavor, apple flavor, banana flavor, pineapple flavor, grape flavor, mango flavor, butter flavor. Formulated perfume ingredients such as milk flavor, fruit mix flavor, tropical fruit flavor, and the like.

  The content of the component (b-1) is for the liquid oral cavity of the present invention from the viewpoint of ensuring solubility or dispersibility while providing a good flavor even if the liquid oral cavity composition of the present invention is alkaline. It is 0.2% by mass or more, preferably 0.3% by mass or more in the composition, and even if it is a foamy liquid oral composition discharged from a foam discharge container, the flavor is effectively provided. From the viewpoint of feeling, the content is more preferably 0.4% by mass or more, 1.5% by mass or less, preferably 1.2% by mass or less, and further preferably 1% by mass or less. The content of the component (b-1) is 0.2% by mass or more and 1.5% by mass or less, preferably 0.3 to 1.2% by mass, and more preferably 0.4 to It is 1% by mass.

  The mass ratio ((b-1) / (A)) of the component (b-1) and the component (A) is 0.1 or more from the viewpoint of providing a good flavor and the like of the component (b-1). It is preferably 0.2 or more, more preferably 0.3 or more, and more preferably 0.4 or more from the viewpoint of providing a good flavor and the like, and dissolves the component (b-1) well. Or from the viewpoint of dispersion, it is 1.7 or less, preferably 1.5 or less, the viewpoint of effectively suppressing the generation of precipitates at low temperatures, and the viewpoint of maintaining high stability even after storage at low temperatures. Therefore, it is more preferably 1.2 or less, still more preferably 1 or less. The mass ratio ((b-1) / (A)) of the component (b-1) and the component (A) is 0.1 or more and 1.7 or less, preferably 0.2 to 1. 5, more preferably 0.3 to 1.2 from the viewpoint of effectively suppressing the generation of precipitates at low temperature while providing a good flavor and the like, and from the viewpoint of maintaining high stability even after storage at low temperature. And more preferably 0.4 to 1.

  The liquid oral composition of the present invention comprises, as the component (B), one or more oils selected from triclosan, isopropylmethylphenol, β-glycyrrhetinic acid, and azulene together with the fragrance of the component (b-1). A soluble drug component (b-2) can be contained. Since the liquid composition for oral cavity of the present invention can stably contain a sufficient amount of the component (b-1) from immediately after the production to after the low temperature storage, the component (b-2) described later and Coupled with having a specific mass ratio with the component (A), the specific oil-soluble drug component (b-2), which is the specific oil-soluble drug component, can also be stably contained to obtain a desired drug effect. From the viewpoint of stability after low-temperature storage, the oil-soluble drug component of component (b-2) is preferably one or more selected from triclosan, β-glycyrrhetinic acid, and azulene, and triclosan and β More preferably, it is one or two selected from glycyrrhetinic acid, and is preferably β-glycyrrhetinic acid.

  Thus, when the component (B) contains the component (b-1) together with the component (b-1), the mass ratio of the component (b-2) and the component (A) ((b-2) / ( A)) is 0.005 or more, preferably 0.01 or more, more preferably 0.02 or more, and further preferably from the viewpoint of ensuring the effectiveness of the component (b-2). It is 0.03 or more. Further, the mass ratio ((b-2) / (A)) of the component (b-2) and the component (A) is the solubility or dispersion of both the component (b-1) and the component (b-2). From the viewpoint of securing the property, it is 0.2 or less, preferably 0.15 or less, and more preferably 0.1 or less. The mass ratio ((b-2) / (A)) of the component (b-2) and the component (A) is 0.005 or more and 0.2 or less, preferably 0.01 to 0. It is 15, more preferably 0.02-0.1, still more preferably 0.03-0.1.

  In the liquid composition for oral cavity of the present invention, the content of the nonionic surfactant is not more than 1 time the content of the component (A). Thus, it is known that the ester bond is hydrolyzed in the alkaline region by limiting the content of the nonionic surfactant with respect to the content of the component (A). It is known that the surfactant has a stable amount of the component (b-1) from immediately after production to after low-temperature storage without being affected by the nonionic surfactant which is known to be difficult to dissolve. You can

  The content of the nonionic surfactant is such that the hydrolysis of the ester bond in the alkaline region is suppressed, the decrease in the solubility of the surfactant is suppressed, or the component (b-1) is favorably dissolved or dispersed. From the viewpoint of increasing the adsorptivity of the component (b-2) to the mucous membrane in the oral cavity, gingiva, etc., it is less than 1 time, preferably 0.5 times or less, the content of the component (A). Therefore, it is more preferably 0.2 times or less. From the same viewpoint, the content of the nonionic surfactant in the liquid oral composition of the present invention is preferably 1% by mass or less, more preferably 0.5% by mass or less, and further preferably Is 0.2% by mass or less, more preferably 0.1% by mass or less, or the liquid oral composition of the present invention preferably contains no nonionic surfactant.

  The liquid composition for oral cavity of the present invention contains 55% by mass or more and 98% by mass or less of water as the component (C). The water as the component (C) in the present invention means not only purified water and ion-exchanged water mixed in the liquid oral composition, but also water contained in each of the mixed components in the liquid oral composition. Means total water content. By containing such component (C), water, each component can be dispersed or dissolved well and diffused well in the oral cavity, while maintaining a good appearance and feeling of use.

  The content of the component (C) in the liquid oral composition of the present invention is 55% by mass or more, preferably 60% by mass or more, from the viewpoint of ensuring a good appearance and a feeling of use. It is preferably 65% by mass or more. In addition, the content of the component (C) is from the viewpoint of ensuring a good appearance and feeling of use, when the liquid composition for oral cavity of the present invention is filled in a foam discharge container, good foam quality and dischargeability from the container are obtained. Of the present invention, and from the viewpoint of increasing the adsorptivity of the component (b-2) in the oral cavity, when the composition for a liquid oral cavity of the present invention contains the component (b-2). In the composition for liquid oral cavity, it is 98 mass% or less, preferably 90 mass% or less, more preferably 85 mass% or less. And the content of the component (C) is 55% by mass or more and 98% by mass or less, preferably 60 to 90% by mass, more preferably in the liquid composition for a liquid oral cavity containing a foam discharge container of the present invention. Is 65 to 85 mass%.

The liquid composition for oral cavity of the present invention preferably contains a liquid polyol (D) at 20 ° C. from the viewpoint of maintaining good dischargeability when filled in a foam discharge container. Examples of the component (D) include one or more selected from glycerin, propylene glycol, butylene glycol, and polyethylene glycol having an average molecular weight of 1,000 or less. Among them, it is preferable to use two or more kinds of polyols selected from glycerin, propylene glycol, butylene glycol, and polyethylene glycol having an average molecular weight of 1,000 or less, and one or more kinds selected from glycerin, propylene glycol, and butylene glycol. Is preferably used, and it is preferable to use one or two selected from glycerin and propylene glycol. The average molecular weight of the polyethylene glycol means a mass average molecular weight measured by GPC (gel permeation chromatography).
The weight average molecular weight of the polyethylene glycol used as the component (D) is 1000 from the viewpoint of effectively preventing clogging of the porous member of the foam discharge container when the liquid composition for oral cavity of the present invention is filled in the foam discharge container. Or less, preferably 850 or less, and from the viewpoint of good foam quality, it is preferably 200 or more, more preferably 400 or more.

  The content of the component (D) is preferably 10% by mass or more, and more preferably in the liquid oral cavity composition of the present invention, from the viewpoint of maintaining good dischargeability when filled in a foam discharge container. It is 15% by mass or more, preferably 35% by mass or less, and more preferably 32% by mass or less from the viewpoint of suppressing the increase in viscosity at low temperature. The content of polyethylene glycol having an average molecular weight of 1,000 or less is preferably 7% by mass or less, and more preferably 5% by mass in the composition for liquid oral cavity of the present invention, from the viewpoint of suppressing increase in viscosity at low temperature. It is below, more preferably 2% by mass or less, and may not be contained.

  In the liquid oral composition of the present invention, it is preferable to limit the content of ethanol from the viewpoint of reducing irritation while ensuring good flavor and the like due to the component (b-1), and limiting the content of ethanol. However, the solubility or dispersibility of each component can be secured. The content of such ethanol is preferably 15 times or less, more preferably 10 times or less, further preferably 5 times or less, and 3 times or less with respect to the content of the component (b-1). May be. From the same viewpoint, the content of ethanol is preferably 8% by mass or less, more preferably 5% by mass or less, and further preferably 3% by mass or less in the liquid oral composition of the present invention. Or the liquid oral composition of the present invention preferably does not contain ethanol.

In the liquid oral composition of the present invention, while ensuring the solubility or dispersibility of each component, from the viewpoint of imparting a transparent or translucent appearance, and good dischargeability when filled in a foam discharge container. From the viewpoint of holding, it is preferable to limit the content of the abrasive powder. Examples of the abrasive powder include light calcium carbonate, heavy calcium carbonate, zeolite, abrasive silica having an oil absorption of 50 to 150 mL / 100 g, dicalcium phosphate, tricalcium phosphate, insoluble sodium metaphosphate, aluminum hydroxide. And one or more selected from magnesium phosphate, calcium pyrophosphate, magnesium carbonate, and the like.
The oil absorption amount indicates the amount of oil that can be supported by silica, and the measuring method is a method based on JIS K5101-13-2 (established in 2004), which is specified by the amount of boiled linseed oil absorbed. To do.

  The content of the abrasive powder is the liquid of the present invention from the viewpoint of ensuring the solubility or dispersibility of each component from immediately after production until after storage at low temperature, and from the viewpoint of imparting a transparent or translucent appearance. In the oral composition, preferably 0.1% by mass or less, more preferably 0.05% by mass or less, further preferably 0.01% by mass or less, or the liquid oral composition of the present invention. The article preferably does not contain abrasive powder.

The liquid oral composition of the present invention has a pH at 25 ° C. of 8 or more and 11 or less, preferably 8.5 or more, and more preferably 9 or more, from the viewpoint of an alkaline region where the cleaning performance is enhanced. , Preferably 10.8 or less, more preferably 10.5 or less.
A pH adjuster may be used to adjust the pH of the liquid oral composition of the present invention at 25 ° C to the above range. As the pH adjuster, one or two kinds selected from carbonates and bicarbonates; potassium hydroxide and sodium hydroxide; organic acids such as citric acid, malic acid, lactic acid, tartaric acid and succinic acid, or salts thereof. The above is mentioned. Of these, carbonates and bicarbonates are preferable, and sodium carbonate, sodium hydrogen carbonate, and sodium sesquicarbonate are preferable. In this case, the content of the pH adjuster in the liquid oral composition of the present invention is preferably 0.1 to 2% by mass, and more preferably from the viewpoint of stabilizing the pH of the liquid oral composition. Is 0.15 to 1.5% by mass, more preferably 0.18 to 1% by mass, and even more preferably 0.2 to 0.8% by mass.

  The liquid oral composition of the present invention, in addition to the above components, within the range that does not impair the effects of the present invention, for example, anionic surfactants such as alkyl sulfate ester salts; sodium alginate, carboxymethyl cellulose or a salt thereof, hydroxyethyl cellulose, A binding agent such as carrageenan or xanthan gum; a preservative; a pigment; a dye or the like may be appropriately contained. Among them, the content of the alkyl sulfate ester salt is preferably 0.2% by mass or less in the liquid oral composition of the present invention from the viewpoint of ensuring good stability immediately after production until after storage at low temperature. , More preferably 0.1% by mass or less, further preferably 0.05% by mass or less, still more preferably 0.01% by mass or less, or the alkyl sulfate ester salt may not be contained.

  The liquid oral composition of the present invention is applied to the oral cavity in the form of foam, and while realizing an excellent feeling of use, from the viewpoint of spreading the liquid oral composition to every corner of the oral cavity, foam ejection It is preferably filled in a container. The foam discharge container may be a non-aerosol type container or an aerosol type container as long as it has a discharge port. When using the liquid oral composition of the present invention, the liquid oral composition, which is the content, is directly ejected from the ejection opening of the foam ejection container into the oral cavity, and the liquid oral cavity is passed through the ejection opening. The composition can be applied in the oral cavity in the form of foam.

  The non-aerosol type container is a normal pressure container that does not require a propellant such as a compressed gas, and examples of such a container include a squeeze type container and a pump type container. These containers have a viewpoint of forming a foamy composition satisfactorily when the contents pass through the discharge port, and the formed foam has good retention and homogeneity, and enhances the usability, etc. From the viewpoint, it is preferable that each of the containers has a mesh or a porous member having a plurality of small holes interposed in the flow path of the content from the container body to the discharge port.

  A squeeze-type container is a squeeze-deformation of the body located in the deformable container body to mix air with the air pressure-fed from within the headspace while passing through a porous member as necessary. To form bubbles, and the bubbles are discharged from the discharge port. Specifically, for example, the containers described in JP-A-7-215352, JP-A-58-174272, and JP-A-62-42787 can be used.

  A pump-type container is a foam head that is equipped with a foam dispenser that has a discharge port. Is formed and the bubbles are discharged from the discharge port. Usually, an air cylinder for inflowing air from the outside and a liquid cylinder serving as a flow path for the contents are provided, and a mixing chamber for mixing the air pressure-fed by pushing the pump head with the contents. Specifically, for example, the containers described in JP-A-7-315463, JP-A-8-230961, and JP-A-3-7963 can be used.

  An aerosol type container is a container filled with a compressed gas as a propellant, and when the content is discharged from a discharge port, bubbles are formed while taking in the gas through a valve mechanism. The compressed gas used is preferably a gas containing 90% by mass or more of carbon dioxide gas.

  Among these foam discharge containers, a squeeze container is preferable from the viewpoint of usability, that is, from the viewpoint of easily discharging the contents directly from the discharge port into the oral cavity, and also from the viewpoint of convenience and portability, and is discharged from the container body. A container having meshes of # 90 to # 305 in the flow path of the contents up to the outlet is more preferable.

  The liquid composition for oral cavity of the present invention can dissolve or disperse the component (B) in a stable manner, and thus may be transparent or translucent and may be colored. The term “transparent or translucent” specifically means that the transmittance of light having an absorption wavelength of 550 nm is 80% or more when a liquid oral composition is filled in a cell having an optical path length of 10 mm. The transmittance is preferably 90% or more. A quartz cell is used as the cell.

  Hereinafter, the present invention will be specifically described based on Examples. Unless otherwise specified in the table, the content of each component is% by mass.

[Examples 1 to 14, Comparative Examples 1 to 3]
According to the formulation shown in Table 1, a liquid oral composition in which the pH at 25 ° C. was adjusted to 10 was produced, and each evaluation was performed according to the following methods.
The results are shown in Table 1.
Further, Tables 2 to 4 show specific fragrances that can be used as the fragrance of the component (b-1) in the liquid oral composition of the present invention. In addition, in Examples 1-10 and Comparative Examples 1-2, the fragrance | flavor shown in Table 3 was used.

《Stability evaluation》
Each of the obtained liquid oral compositions was filled in a glass bottle, and both immediately after filling and after storage for 1 week at -5 ° C, the liquid oral composition of the contents was visually observed from the outside of the glass bottle, Evaluation was made according to the following criteria.
A: Transparent and uniform B: Slightly cloudy but uniform C: Cloudy but no precipitate D: Precipitate was confirmed

  According to the results of Table 1, Comparative Example 1 in which the mass ratio ((b-1) / (A)) of the component (b-1) and the component (A) exceeds 1.7, and the component (b-2) ) And the component (A) in a mass ratio ((b-2) / (A)) of more than 0.2, in comparison with Comparative Examples 2 to 3, only the component (b-1) is used as the component (B). Examples 1 to 7 containing, and Examples 8 to 14 containing both the component (b-1) and the component (b-2), after production, are fragrances, or fragrances and specific oil-soluble medicinal ingredients. Stable and contain transparency, and maintain good transparency, Examples 1-2, 4-7, 8-11, even after low temperature storage, fragrance, or fragrance and specific oil-soluble medicinal ingredients It can be seen that is contained stably, and the transparency can be satisfactorily maintained.

Claims (6)

The following components (A), (B), and (C):
(A) One or more amphoteric surfactants selected from coconut oil fatty acid amide alkyl betaine and alkyl sulfobetaine,
(B) Perfume 0.2 mass% or more and 1.5 mass% or less (b-1) only, or perfume 0.2 mass% or more and 1.5 mass% or less (b-1), triclosan, isopropylmethylphenol, β-glycyrrhetinic acid, and one or more oil-soluble medicinal components (b-2) selected from azulene,
(C) contained the following 55 wt% or more 98% by weight of water, the content of nonionic surfactant is less than 1 times the amount of the component (A) I der most 1 mass%, the component ( When the mass ratio ((b-1) / (A)) of b-1) and component (A) is 0.1 or more and 1.7 or less, and component (B) contains component (b-2). The mass ratio ((b-2) / (A)) between the component (b-2) and the component (A) in 0.005 to 0.2 and the pH at 25 ° C. is 8.5 to 11 A liquid oral composition which is:   The liquid oral composition according to claim 1, wherein the content of ethanol is 3% by mass or less.   The liquid oral composition according to claim 1 or 2, wherein the content of the abrasive powder is 0.1% by mass or less.   Furthermore, the liquid composition for oral cavity according to any one of claims 1 to 3, which contains a liquid polyol (D) at 20 ° C.   The liquid oral composition according to any one of claims 1 to 4, which is filled in a foam discharge container.   The liquid oral composition according to claim 1, which is transparent or translucent.