JP2024039424A - Detergent composition - Google Patents

Abstract

To provide a detergent composition comprising ethylenediamine tetraacetic acid and/or a salt thereof and methyl glycine diacetic acid and/or a salt thereof in a specific ratio, which maintains superior storage stability even after long-term preservation, making it suitable for hard surfaces, glass bottles, and CIP cleaning.SOLUTION: A detergent composition comprises component (A): ethylenediamine tetraacetic acid and/or a salt thereof, component (B): as methyl glycine diacetic acid and/or a salt thereof, component (C): a nonionic surfactant, and component (D): alkali metal carbonate, with the mass ratio of component (A) to component (B), (A)/(B), of 0.01 or more and 10 or less.SELECTED DRAWING: None

Description

The present invention relates to a cleaning composition, and mainly to a cleaning composition suitable for cleaning and removing dirt adhering to hard surfaces such as metals, plastics, glass, and ceramics. In particular, the present invention relates to a cleaning composition suitable for cleaning and removing dirt adhering to manufacturing equipment in food factories, beverage factories, etc. by CIP cleaning.

In recent years, in beverage factories, food factories, etc., it has become difficult to disassemble and clean the manufacturing equipment as the manufacturing equipment becomes larger and the frequency of cleaning increases due to the increase in the number of manufactured products. Therefore, instead of disassembling and cleaning, CIP cleaning (CIP cleaning), which cleans and removes residual dirt by filling and circulating cleaning liquid inside manufacturing equipment such as piping, sterilizers, and filling machines, or by spraying cleaning liquid inside manufacturing equipment, is recommended. Cleaning in place (cleaning in place) methods are widely used.

This CIP cleaning uses one or more cleaning agents selected from alkaline cleaning agents, acid cleaning agents, disinfectants, and the like. For example, CIP cleaning generally includes 1. Water washing, 2. Alkaline cleaning, 3. Rinse with water, 4. Acid cleaning, 5. Rinse with water, 6. Sterilization, 7. This is done through a process called water rinsing. However, depending on the ingredients of each cleaning agent or the type and condition of dirt, some of the above steps may be omitted, the order of the above steps may be changed, or the same steps may be repeated.
Further, when the target stain is mainly food residue, the food residue includes organic stains such as proteins, fats and oils, and carbohydrates, and inorganic stains such as calcium carbonate, calcium phosphate, and calcium silicate. Some of the above-mentioned organic stains include tough ones that have been denatured by heat, such as those found in sterilizers.

Patent Documents 1 to 4 are known as alkaline cleaning agents for use in alkaline cleaning in such CIP cleaning. Specifically, Patent Document 1 describes alkali metal hydroxides, fatty acids and/or salts thereof whose hydrocarbon group has 6 to 10 carbon atoms, chelating agents, nonionic surfactants, and polymers such as polyacrylic acid. A liquid alkaline cleaning composition containing a dispersant is disclosed, and Patent Document 2 discloses an alkaline agent and a chelate selected from the group consisting of diethylenetriaminepentaacetic acid or a salt thereof, and methylglycinediacetic acid or a salt thereof. Patent Document 3 discloses an alkaline detergent composition containing the following agents: sodium hydroxide, ethylenediaminetetraacetic acid and/or its salts, triethylenetetraaminehexaacetic acid, glycol etherdiaminetetraacetic acid, ethylenediaminediacetic acid, Liquid hard surface cleaning compositions containing at least one solubilizer selected from succinic acid and salts thereof are disclosed. Furthermore, Patent Document 4 discloses that a CIP cleaning composition containing an alkali metal hydroxide and/or alkaline earth metal hydroxide and methylglycine diacetic acid or a salt thereof is diluted with water for a diluted cleaning solution. , describes a CIP cleaning method in which a chlorine-based disinfectant is added to perform CIP cleaning and sterilization cleaning of a food and beverage production line at the same time.

JP2019-059851A JP 2017-210522 Publication JP2012-087161A Japanese Patent Application Publication No. 2017-002250

However, the highly concentrated alkaline cleaning agents described in Patent Documents 1 to 4 are desirable from the viewpoint of manufacturing, container and transportation costs, as well as reducing carbon dioxide emissions associated with transportation costs, but they are highly concentrated. Cleaning agents containing an alkali and a chelating agent have a problem of poor storage stability. When such a highly concentrated cleaning agent is stored in a storage tank, as the liquid level decreases as the cleaning agent is used, the water in the cleaning agent adhering to the upper wall of the tank evaporates and forms a solid on the wall. When the next cleaning agent is replenished and the cleaning solution comes into contact with the solids, ethylenediaminetetraacetate, which has poor solubility, precipitates and becomes a nucleus, promoting crystal precipitation and freezing. This can clog the detergent supply port and the detergent supply pump, and may even cause the detergent supply pump to malfunction.

The present invention was made in view of the above problems, and provides a cleaning composition that suppresses the formation of scale, has excellent storage stability even when stored for a long period of time, and is suitable for cleaning hard surfaces, glass bottles, and CIP. The purpose is to

That is, the present invention
(1) Ethylenediaminetetraacetic acid and/or its salt as component (A), methylglycine diacetic acid and/or its salt as component (B), nonionic surfactant as component (C), alkali metal carbonate as component (D) A cleaning composition containing a salt and having a mass ratio (A)/(B) of components (A) and (B) of 0.01 or more and 10 or less,
(2) The cleaning composition of (1) above further containing a polymer dispersant as component (E),
(3) The cleaning composition of (1) or (2) above, further containing a chelating agent other than the (A) component and (B) component as the (F) component;
(4) The cleaning composition of (3) above, wherein the cleaning composition is for cleaning hard surfaces;
(5) The cleaning composition of (3) above, wherein the cleaning composition is for CIP cleaning;
(6) The cleaning composition of (3) above, wherein the cleaning composition is for cleaning glass bottles;
The gist is:

The cleaning composition of the present invention has excellent storage stability, and there is no risk of crystal precipitation or freezing even when stored for a long period of time. It has an excellent effect on CIP cleaning of production equipment for products containing not only organic substances but also many inorganic substances, such as soy milk, oat milk, and almond milk.

Ethylenediaminetetraacetic acid and/or its salt, which is component (A), used in the cleaning composition of the present invention is used. As the ethylenediaminetetraacetic acid salt, ethylenediaminetetraacetic acid sodium salt, ethylenediaminetetraacetic acid potassium salt, etc. are used, and the (A) component can be used alone or in combination of two or more types. Ethylenediaminetetraacetic acid sodium salts, such as tetraacetic acid tetrasodium salt, are preferred. If the proportion of component (A) in the cleaning composition is less than 0.1% by mass, sufficient scale removal properties may not be obtained, and if it exceeds 10% by mass, corrosion prevention properties for glass bottles may not be obtained. There may be no. Therefore, the proportion of component (A) in the cleaning composition is preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.2% by mass or more and 5% by mass or less, and 0.3% by mass. Above, 1% by mass or less is more preferable.

As component (B), methylglycine diacetic acid and/or a salt thereof is used. As the methylglycine diacetate, sodium methylglycine diacetate, potassium methylglycine diacetate, etc. are used, and the component (B) can be used alone or in combination of two or more. is preferably sodium methylglycine diacetate, such as trisodium methylglycine diacetate. If the proportion of component (B) in the cleaning composition is less than 0.1% by mass, sufficient scale removal properties may not be obtained, and if it exceeds 50% by mass, corrosion prevention properties for glass bottles may not be obtained. There may be no. Therefore, the proportion of component (B) in the cleaning composition is preferably 0.1% by mass or more and 50% by mass or less, more preferably 1% by mass or more and 45% by mass or less, and 5% by mass or more and 40% by mass. % or less is more preferable.

As component (C), a nonionic surfactant is used. As the nonionic surfactant of component (C), pluronic type surfactants such as polyoxyethylene polyoxypropylene polymer (ethylene oxide and propylene oxide may be random, block, or reverse), polyoxyalkylene alkyl ether, Polyoxyalkylene dialkyl ether, polyoxyalkylene alkyl ester, polyoxyalkylene alkyl diester, polyoxyalkylene aryl ether, glycerin fatty acid ester and its alkylene oxide adduct, polyglycerin fatty acid ester, sorbitan fatty acid ester, polyoxyalkylene sorbitan fatty acid ester, Polyoxyalkylene sorbitol fatty acid ester, polyoxyalkylene glycol fatty acid ester, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene polyoxypropylene alkenyl ether, random or block adduct of ethylene oxide and propylene oxide, polyoxyalkylene castor oil, polyoxy Examples include alkylene hydrogenated castor oil, polyoxyalkylene alkylamine, dipolyoxyalkylene alkylamine, higher fatty acid alkanolamide, and alkylamine oxide. These nonionic surfactants can be used alone or in combination of two or more. Among these nonionic surfactants, dipolyoxyalkylene alkylamine, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene polyoxypropylene alkenyl ether, ethylene oxide and propylene oxide are preferred from the viewpoint of detergency and foam control properties. Random or block adducts are preferred. These preferred nonionic surfactants can be used alone or in combination of two or more. If the proportion of component (C) in the cleaning agent composition is less than 0.1% by mass, sufficient cleaning performance may not be obtained, and if it exceeds 6% by mass, foam suppressing properties may not be sufficient. . Therefore, the proportion of component (C) in the cleaning composition is preferably 0.1% by mass or more and 6% by mass or less, more preferably 0.2% by mass or more and 5.5% by mass or less, and 0.3% by mass or less. It is more preferably at least 5% by mass and at most 5% by mass.

As the component (D), examples of alkali metal carbonates include sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium sesquicarbonate, potassium sesquicarbonate, sodium percarbonate, and potassium percarbonate. . These alkali metal carbonates can be used alone or in combination of two or more. Among these alkali metal carbonates, sodium carbonate is preferred from the viewpoint of cleansing properties and cost. If the proportion of component (D) in the cleaning composition is less than 1% by mass, sufficient cleaning properties may not be obtained, and even if it exceeds 50% by mass, no further effects can be expected. Therefore, the proportion of component (D) in the cleaning composition is preferably 1% by mass or more and 50% by mass or less, more preferably 3% by mass or more and 45% by mass or less, and 5% by mass or more and 40% by mass or less. is even more preferable.

In the cleaning composition of the present invention, the mass ratio of the component (A) to the component (B) is such that the value of (A)/(B) is 0.01 or more and 10 or less. If the mass ratio (A)/(B) of the (A) component and (B) component of the cleaning composition is less than 0.01, the scale removal performance may decrease, and if it exceeds 10, the mass ratio (A)/(B) of the (A) component and (B) component may decrease. Corrosion protection may be reduced. As for the mass ratio of component (A) and component (B), the value of (A)/(B) is preferably 0.02 or more and 8 or less, more preferably 0.1 or more and 1 or less. .

The detergent composition of the present invention may further contain a polymer dispersant as component (E) in order to improve scale inhibition properties. Examples of polymeric dispersants include carboxylic acid type polymers, such as polyacrylic acid, polymaleic acid, polymethacrylic acid, polyitaconic acid, acrylic acid copolymers, maleic acid copolymers, and methacrylic acid copolymers. Coalescence, acrylic acid/maleic acid copolymer, acrylic acid/methacrylic acid copolymer, acrylic acid/sulfonic acid copolymer, olefin/maleic acid copolymer, maleic anhydride/styrene copolymer, maleic anhydride/ Examples include ethylene copolymers, maleic anhydride/vinyl acetate copolymers, maleic anhydride/acrylic acid ester copolymers, and salts thereof such as sodium salts and potassium salts. As the polymeric dispersant of component (E), polyacrylic acid or its salt, polymaleic acid or its salt, acrylic acid/maleic acid copolymer or its salt, acrylic acid/sulfonic acid copolymer with excellent scale inhibiting properties are used. Polyacrylic acid or its salt, acrylic acid/maleic acid copolymer or its salt are particularly preferred. The polymeric dispersant (E) component can be used alone or in combination of two or more. When a polymer dispersant is further added to the cleaning composition of the present invention, the proportion of the polymer dispersant in the cleaning composition is preferably 0.01% by mass or more and 7.0% by mass or less, The content is more preferably 0.05% by mass or more and 4.0% by mass or less, and particularly preferably 0.1% by mass or more and 2.0% by mass or less. If the proportion of component (E) added to the cleaning composition is less than 0.01% by mass, sufficient scale inhibition properties cannot be obtained, and even if the amount exceeds 7.0% by mass, no further effect will be obtained. Hard to obtain.

Polyacrylic acid or a salt thereof preferably has a weight average molecular weight of 2,000 or more and 20,000 or less, particularly preferably 3,000 or more and 10,000 or less, from the viewpoint of scale control properties and storage stability. . In addition, the acrylic acid/maleic acid copolymer or its salt preferably has a weight average molecular weight of 20,000 or more and 100,000 or less, preferably 30,000 or more and 80,000 or less, from the viewpoint of scale suppression properties and storage stability. 000 or less are particularly preferred. The weight average molecular weight of the polymer dispersant is a value measured by gel permeation chromatography (GPC). Specifically, TSKgel G4000Hxl, G3000Hxl, and G2000Hxl (all manufactured by Tosoh Corporation) were connected in series as columns, tetrahydrofuran (THF) was used as the eluent, the eluent flow rate was 1 mL/min, and the detector was a differential refractor. (RI), sample concentration: 0.1% by mass (THF solution), sample amount: 200 μL, and obtained by measuring at a column temperature of 40°C.

The cleaning composition of the present invention may further contain a chelating agent other than the above-mentioned components (A) and (B) as component (F) in order to improve scale removal performance. Chelating agents other than the above components (A) and (B) include hydroxyethylenediaminetriacetic acid or its salt, diethylenetriaminopentaacetic acid or its salt, triethylenetetraaminehexaacetic acid or its salt, hydroxyethyliminodiacetic acid or its salt. salts, glutamic acid diacetic acid or its salts, iminodisuccinic acid or its salts, nitrilotriacetic acid or its salts, tripolyphosphoric acid or its salts, gluconic acid or its salts, citric acid or its salts, etc. These salts include sodium Examples include salts, potassium salts, and the like. Component (F) can be used alone or in combination of two or more.

The cleaning composition of the present invention may further contain an alkaline agent other than the above-mentioned component (D) as component (G). As alkaline agents other than the above component (D), alkali metal hydroxide salts, alkali metal silicates, phosphates, etc. can be blended. These can be used alone or in combination of two or more. Examples of alkali metal hydroxide salts include sodium hydroxide and potassium hydroxide. Examples of alkali metal silicates include sodium orthosilicate, potassium orthosilicate, sodium metasilicate, potassium metasilicate, No. 1 sodium silicate, No. 2 sodium silicate, and No. 3 sodium silicate specified in JIS K1408, and Nihon Kagaku Kogyo. Co., Ltd. product names; A potassium silicate, B potassium silicate, C potassium silicate, etc., sodium metasilicate pentahydrate, sodium metasilicate nonahydrate, etc. are exemplified. Examples of the phosphate include trisodium phosphate anhydride, trisodium phosphate dodecahydrate, and the like. Component (G) can be used alone or in combination of two or more.

The cleaning composition of the present invention may further contain an organic phosphonic acid or a salt thereof, an organic phosphinic acid or a salt thereof as the component (H). Examples of the organic phosphonic acid or its salt include methyldiphosphonic acid or its salt, ethylidene diphosphonic acid or its salt, 1-hydroxyethylidene-1,1-diphosphonic acid or its salt, 1-hydroxypropylidene-1,1- Diphosphonic acid or its salt, 1-hydroxybutylidene-1,1-diphosphonic acid or its salt, ethylaminobis(methylenephosphonic acid) or its salt, dodecylaminobis(methylenephosphonic acid) or its salt, ethylenediaminebis(methylene phosphonic acid) or its salts, aminotri(methylenephosphonic acid) or its salts, ethylenediaminetetra(methylenephosphonic acid) or its salts, 1,2-propylenediaminetetra(methylenephosphonic acid) or its salts, hexamethylenediaminetetra(methylenephosphonic acid) or its salts, hexamethylenediaminetetra(methylenephosphonic acid) or its salts, cyclohexanediaminetetra (methylenephosphonic acid) or its salts, glycol ether diaminetetra (methylenephosphonic acid) or its salts, diethylenetriaminepenta (methylenephosphonic acid) or its salts, triethylenetetraminehexa (methylenephosphonic acid) or its salts, tri(2-aminoethyl)amine hexa(methylenephosphonic acid) or its salts, tetraethylenepentamine hepta(methylenephosphonic acid) or its salts, pentaethylenehexamine octa(methylenephosphonic acid) or its salts, Examples include 2-phosphonobutane-1,2,4-tricarboxylic acid or a salt thereof, aminotrimethylenephosphonic acid or a salt thereof, and the like. Examples of organic phosphinic acids or salts thereof include bis(poly-2-carboxyethyl)phosphinic acid or salts thereof, bis-poly(1,2-dicarboxyethyl)phosphinic acids or salts thereof, phosphinocarboxylic acid copolymers, etc. can be mentioned. Examples of salts of organic phosphonic acids and organic phosphinic acids include sodium salts and potassium salts. Component (H) can be used alone or in combination of two or more. Among these, from the viewpoint of scale removal properties, 2-phosphonobutane-1,2,4-tricarboxylic acid or its salt, aminotri(methylenephosphonic acid) or its salt, ethylenediaminetetra(methylenephosphonic acid) or its salt, 1- Hydroxyethylidene-1,1-diphosphonic acid or a salt thereof is preferred, and aminotri(methylenephosphonic acid) or a salt thereof is particularly preferred. When blending component (H), the proportion of component (H) in the cleaning composition is preferably 0.01% by mass or more and 5.0% by mass or less, and 0.05% by mass or more and 4.0% by mass. % or less, and particularly preferably 0.1% by mass or more and 3.0% by mass or less. If the proportion of the component (H) is less than 0.01% by mass, the effect of improving scale removability will be insufficient, and even if it exceeds 5.0% by mass, no further effect will be obtained. When the component (H) contains an organic phosphonate, the ratio of the component (H) in the cleaning composition is determined from the amount of the organic phosphonate converted to organic phosphonic acid.

The cleaning composition of the present invention is suitable for cleaning hard surfaces such as glass, plastic, and metal, and is suitable for cleaning hard surfaces such as walls and floors of bathrooms, kitchens, commercial kitchens, factories, and cooking utensils. It is suitable for CIP cleaning of factory facilities, etc.

Hereinafter, the present invention will be explained in more detail with reference to Examples. Each component used in Examples and Comparative Examples is shown below. In the table, the proportion of each component is shown in mass %. In addition, in the table, the ratio of each component indicates the ratio as a pure component. Further, regarding the notation of an alkyl group, for example, when it is written as alkyl (C8-10), it represents a mixture having an alkyl group having 8 or more and 10 or less carbon atoms.

(A) Component A-1: Ethylenediaminetetraacetic acid tetrasodium salt

(B) Component B-1: Methylglycine diacetic acid trisodium salt

(C) Component C-1: Pluronic type nonionic surfactant 1 (ADEKA Pluronic TR-913R)
C-2: Pluronic type nonionic surfactant 2 (ADEKA Pluronic 25R-2)
C-3: Polyoxyalkylene alkyl ether 1 (ADEKA NOL B-2030 manufactured by ADEKA)
C-4: Polyoxyalkylene alkyl ether 2 (ADEKA NOL LG-126)

(D) Component D-1: Sodium carbonate

(E) Component E-1: Sodium polyacrylate 1 (weight average molecular weight 4,000)
E-2: Sodium acrylic acid/maleic acid copolymer (weight average molecular weight 70,000)

(F) Component F-1: Sodium gluconate F-2: Sodium tripolyphosphate

(G) Component G-1: Sodium hydroxide G-2: Anhydrous sodium metasilicate G-3: Trisodium phosphate dodecahydrate

Other ingredients Other: Glauber's salt

Examples 1 to 70, Comparative Examples 1 to 4
The cleaning compositions shown in Tables 1 to 8 were prepared, and each cleaning composition was tested for cleaning properties, antifoaming properties, scale removal properties, scale inhibition properties, storage stability, and glass corrosion prevention properties. In addition, the ratio of each component in the table is an anhydride equivalent value. The results are shown in Tables 1-8.

*1: Cleanability test test method:
Measure the mass of a stainless steel piece (6 cm x 7 cm rectangular, 1 mm thick SUS316 piece), spray 0.5 mL of various stains onto it (soil adhesion amount: 0.5 g), and heat it at 130°C for 30 minutes to remove the stain. The mass was measured using the sample to which it was attached as a pre-cleaning test piece. This pre-cleaned test piece was immersed in 300 mL of a 1% by mass aqueous solution of each cleaning composition, left at 80°C for 20 minutes, rinsed with ion-exchanged water, and dried at 105°C for 30 minutes to obtain a washed test piece. After that, the mass of the washed test piece was measured.
The mass difference between the pre-washed test piece and the stainless steel piece before dirt is attached is taken as the amount of dirt attached, and the cleaning rate is calculated from the change in mass of the test piece before and after washing using the formula (1) below, and the cleanability is evaluated using the following criteria. evaluated.

[Formula 1]
Cleaning rate (%) = {(mass of test piece before cleaning - mass of test piece after cleaning) / (amount of dirt attached)} x 100... (1)

Evaluation criteria:
○: Cleaning rate of 80% or more (excellent cleaning performance).
△: Cleaning rate of 60% or more and less than 80% (cleanable).
×: Cleaning rate less than 60% (poor cleaning performance).
△ and ○ were judged as practical.

*2: Defoaming test Each cleaning composition was diluted to 1% by mass with hard water of 75mg/L (German hardness: 4.2°DH) in terms of calcium carbonate to prepare 100mL of diluted cleaning solution, and heated to 80℃. After heating, 0.5 g of skim milk was added. Next, the skim milk was stirred until completely dissolved, and 20 g was placed in a 100 mL Epton tube with a glass stopper, and the temperature was raised to 80° C. in a hot water bath. After that, shake it up and down 60 times at a rate of once per second, and after standing for 1 minute while keeping it at 80℃, measure the height of the foam from the diluted cleaning solution surface, and defoamer according to the following criteria. The gender was evaluated.

Evaluation criteria:
○: The height of the bubbles is less than 5 mm.
Δ: The height of the bubbles is 5 mm or more and less than 12 mm.
×: The height of the bubbles is 12 mm or more.
△ and ○ were judged as practical.

*3: Scale removability test The mass of a stainless steel piece (2 cm x 7 cm, 1 mm thick SUS316 piece) was measured, 0.2 g of 25% calcium phosphate suspension was applied as a stain, and the mixture was heated at 100°C for 60 minutes. The dried material was used as a test piece and its mass was measured. This test piece was immersed in 100 mL of an aqueous solution of each cleaning composition diluted to 1% by mass with dilution water, left at 80°C for 20 minutes, rinsed with ion-exchanged water, and dried at 105°C for 30 minutes to improve its appearance. Scale cleaning performance was evaluated by visual observation using the following criteria.

Evaluation criteria:
○: No stains.
△: Slight stains.
×: There is dirt.
△ and ○ were judged as practical.

*4: Scale inhibition test Each cleaning composition was diluted with dilution water so that the test solution concentration was 100 mg/L (German hardness: 5.6° DH) in terms of calcium carbonate, and the alkali metal hydroxide concentration was A test solution containing 0.01% by mass was prepared. After each test solution placed in a 30 mL glass bottle was allowed to stand at 80° C. for 15 hours, the deposits and precipitates on the bottom of the glass bottle were visually confirmed, and the scale suppression properties were evaluated based on the following criteria.

Evaluation criteria:
○: Almost no deposits or precipitates are observed.
Δ: A small amount of deposits and precipitates are observed.
×: A large amount of deposits and precipitates are observed.
△ and ○ were judged as practical.

*5: Storage stability test method:
100g of each cleaning composition was placed in a polypropylene container and allowed to stand for one month in each incubator set at -5°C, 25°C, and 40°C.The appearance was visually observed and evaluated using the following criteria. did.

Evaluation criteria:
○: Stable with no moisture absorption or agglomeration observed in any temperature range.
Δ: Moisture absorption or agglomeration occurs in some parts in any temperature range.
×: Moisture absorption or agglomeration is observed in any temperature range.
△ and ○ were judged as practical.

*6: Glass corrosion prevention test After a slide glass was immersed in each cleaning composition diluted to 1% by mass with ion-exchanged water at 60°C for 1 hour, the degree of whitening was visually judged according to the following criteria.
Evaluation criteria:
○: No whitening occurred.
△: Whitening is observed, but it can be used with practical care.
×: Whitening occurred.

Claims (6)

(A) ethylenediaminetetraacetic acid and/or a salt thereof,
(B) methylglycine diacetic acid and/or a salt thereof as a component;
(C) a nonionic surfactant as a component;
(D) an alkali metal carbonate as a component;
and a mass ratio (A)/(B) of the component (A) to the component (B) is 0.01 or more and 10 or less. The cleaning composition according to claim 1, further comprising a polymer dispersant as component (E). The cleaning composition according to claim 1 or 2, further comprising a chelating agent other than the components (A) and (B) as component (F). The cleaning composition according to claim 1, wherein the cleaning composition is for cleaning hard surfaces. The cleaning composition according to claim 1, wherein the cleaning composition is for CIP cleaning. The cleaning composition according to claim 1, wherein the cleaning composition is for cleaning glass bottles.