TW201318641A - Powdery cosmetic - Google Patents

Abstract

Provided are: a powdery cosmetic in which the stability of L-ascorbic acid 2-glucoside is maintained; and a method for producing the powdery cosmetic. A powdery cosmetic characterized by comprising a powdery L-ascorbic acid 2-glucoside composition that is produced by dissolving L-ascorbic acid 2-glucoside and a pH-adjusting agent in an aqueous solvent and then drying the resultant dissolution solution.

Description

Powder cosmetic

The present invention relates to a powder cosmetic which retains the stability of L-ascorbic acid 2-glycoside and a process for producing the same.

Consumers' demand for cosmetics has been diversified year by year, and in addition to the basic makeup effects, various functions are required. Therefore, conventionally, it has been attempted to formulate whitening ingredients or anti-inflammatory ingredients in cosmetics, and proposals have been made for cosmetics having various pharmacological effects.

Vitamin C (ascorbic acid) is a whitening ingredient which is widely formulated in cosmetics for the purpose of preventing spots and freckles, because it has an abnormal pigmentation inhibitory effect on the skin. However, it has the disadvantage of being extremely weak to heat or oxidation, inerting and easily decomposing.

Regarding the stabilization of vitamin C, a stable vitamin C derivative is known, and it is known that L-ascorbic acid 2-glycoside is retained in a region of pH 4 to 9 when stored in a 0.2% solution at 50 ° C for 20 days. The rate is stable to 90% or more, and it is hydrolyzed by the enzyme in the living body to produce vitamin C, and the physiological action of vitamin C is exerted (Non-Patent Document 1).

Heretofore, as a cosmetic formulated with L-ascorbic acid 2-glycoside, an emulsion, a cream, a whitening liquid, and a whitening mask have been reported (Patent Documents 1 and 2).

(Patent Document 1) Japanese Patent Laid-Open No. Hei 3-135992

(Patent Document 2) Japanese Patent Laid-Open Publication No. 2011-93828

(Non-Patent Document 1) FRAGRANCE JOURNAL 1997-3

The powder cosmetic is a dosage form suitable for a cosmetic because it can be easily identified by coating the applied portion. Generally, a plate-like powder such as mica or talc is used as a main component, and the composition is appropriately mixed with the type of the cosmetic. After that, it is pulverized and manufactured.

However, the present inventors have found that after the start of the research on the powder cosmetic containing L-ascorbic acid 2-glycoside, it is found that the pH is adjusted to 4 to 9, L-ascorbic acid 2- by the above-mentioned manufacturing method. The content of glycosides is still reduced with time, and there is a problem of preservation stability.

The present invention has been made in view of the above circumstances, and provides a powder cosmetic which retains the stability of L-ascorbic acid 2-glycoside and a method for producing the same.

As a result of intensive research, the present inventors have found that when a powder cosmetic is prepared, L-ascorbic acid 2-glycoside is dissolved in a water-based solvent together with a pH adjuster, and dried and powdered to suppress it. A powder cosmetic having a reduced content of L-ascorbic acid 2-glycoside and maintaining stability, and the present invention has been completed.

That is, the present invention provides a powder cosmetic comprising a L-ascorbic acid 2-glycoside powder composition obtained by dissolving L-ascorbic acid 2-glycoside and a pH adjuster in an aqueous solvent, followed by drying the solution. .

Further, the present invention provides a method for producing a powder cosmetic comprising the steps of: dissolving L-ascorbic acid 2-glycoside and a pH adjuster in an aqueous solvent; and drying the obtained solution to produce L - a step of the ascorbic acid 2-glycoside powder composition.

According to the present invention, since the stability over time of L-ascorbic acid 2-glycoside can be improved, a powder cosmetic which can effectively exhibit the whitening effect can be provided.

The powder cosmetic of the present invention contains a L-ascorbic acid 2-glycoside powder composition. The L-ascorbic acid 2-glycoside powder composition is prepared by dissolving L-ascorbic acid 2-glycoside and a pH adjuster in an aqueous solvent, and then drying the aqueous solvent to evaporate (evaporate) or adjusting L-ascorbic acid 2-glycoside with pH. After the agent is dissolved in the aqueous solvent, the solution is further dispersed in a part or all of the powder described later, and then dried to volatilize (evaporate) the aqueous solvent to produce.

L-ascorbic acid 2-glycoside used in the present invention, chemical name: 2-O-α-D-glucopyranoside-L-ascorbic acid, a compound of the formula C ₁₂ H ₁₈ O ₁₁ , having L-ascorbic acid The structure of glucose is bonded to the hydroxyl group at position 2.

L-ascorbic acid 2-glycoside can be produced by a known method, and a commercially available product can also be used. As a commercial item, there are, for example, AA2G (Yumaru PHARCOS Co., Ltd.), AS-G (TECHNOBLE Co., Ltd.), and the like.

The pH adjuster used in the present invention may, for example, be citric acid or apple. Organic acids such as acid, succinic acid, fumaric acid, lactic acid, tartaric acid, acetic acid, inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, etc., or such salts, sodium hydroxide, potassium hydroxide, calcium hydroxide, hydrogen An inorganic base such as magnesium oxide or ammonia water, an organic base such as 2-amino-2-methyl-1-propanol, diisopropanolamine, triisopropanolamine, triethanolamine or monoethanolamine, arginine, A basic amino acid such as lysine, histidine or ornithine. These may be used alone or in combination of two or more. Among them, from the viewpoint of improving the stability of L-ascorbic acid 2-glycoside, sodium hydroxide, potassium hydroxide, 2-amino-2-methyl-1-propanol, triethanolamine, arginine is preferred. And histidine, ornithine, more preferably potassium hydroxide, 2-amino-2-methyl-1-propanol, arginine.

The pH adjustment agent is preferably formulated to improve the pH of the liquid of the L-ascorbic acid 2-glycoside and the pH adjuster in the aqueous solvent from the viewpoint of improving the stability of the L-ascorbic acid 2-glycoside. 25 ° C) is 5 to 8, and particularly good 6 to 7.

The aqueous solvent used in the present invention may, for example, be an aqueous solution of water or an organic solvent. The organic solvent is not particularly limited as long as it is uniformly mixed with water, and is preferably a lower alcohol such as methanol, ethanol or propanol. The ratio of the water of the organic solvent in the aqueous solution is preferably 90% by mass or more, more preferably 95% by mass or more, and particularly preferably 97% by mass or more based on the total amount of the solvent.

Among them, water is preferred from the viewpoint of solubility of L-ascorbic acid 2-glycoside. The water may be any of distilled water, ion exchange water, and purified water.

The amount of water-based solvent used is the solubility of L-ascorbic acid 2-glycoside, From the viewpoint of industrial productivity, when only L-ascorbic acid 2-glycoside and a pH adjuster are dissolved, it is preferably 0.5 mL or more, more preferably 0.7 mL or more, and particularly preferably 1 mL or more, relative to 1 g of the solid content. Here, the solid content means L-ascorbic acid 2-glycoside and a pH adjuster (excluding moisture). Further, when the powder is further added and dispersed in the solution, the amount of the aqueous solvent and the powder is preferably from 1:2 to 1:30, more preferably from 1:3 to 1:20. , especially good 1:3~1:10.

The temperature at which the L-ascorbic acid 2-glycoside and the pH adjuster are dissolved in the aqueous solvent is not particularly limited, but is preferably 25 to 70 ° C, more preferably 40 to 70 ° C.

The method of drying the dissolving agent in which the L-ascorbic acid 2-glycoside and the pH adjuster are dissolved is not particularly limited, and a known method can be applied. For example, thermal drying (hot air drying, room temperature drying, heat transfer drying), spray drying, flow drying, freeze drying, reduced pressure drying, and the like can be given. Among these, from the viewpoint of industrial productivity, it is preferably thermally dried, and more preferably hot air dried. After drying, classification, granulation, pulverization, and the like may be carried out as needed.

The drying temperature at the time of heating is preferably from 25 to 80 ° C, more preferably from 40 to 70 ° C from the viewpoint of shortening the drying time and the stability of the L-ascorbic acid 2-glycoside. Further, the drying time is preferably from 1 to 24 hours, more preferably from 5 to 12 hours.

By containing the L-ascorbic acid 2-glycoside powder composition thus obtained in the powder cosmetic, the stability of the L-ascorbic acid 2-glycoside can be maintained even when exposed to high temperature and high humidity conditions, and can be made into a time-dependent property. A powder cosmetic having a reduced reduction in the content of L-ascorbic acid 2-glycoside.

The powder cosmetic in the present invention refers to a cosmetic having a powder as a main skeleton, and may be any powder having a fluidity at room temperature and a solid shape molded into a powder. The type of the cosmetic material is not particularly limited, and examples thereof include a foundation, a white powder, a concealer, a cosmetic such as brightening, blushing, and eye shadow, or a body powder.

The powder to be used in the powder cosmetic of the present invention may be a general user in the technical field, and examples thereof include an inorganic powder, an organic powder, and the like. The shape, particle diameter, and the like of the powder are not particularly limited.

Examples of the inorganic powder include mica, talc, cerium oxide, sericite, synthetic phlogopite, kaolin, titanium oxide, zinc oxide, fine particle titanium oxide, magnesium oxide, zirconium oxide, calcium carbonate, magnesium carbonate, and aluminum citrate. , magnesium citrate, barium sulfate, magnesium sulfate, magnesium stearate, boron nitride, iron oxide, yellow iron oxide, black iron oxide, carbon black, manganese violet, ultramarine blue, indigo, mica titanium, iron oxide coated mica titanium, The end of the glass, etc.

Examples of the organic substance include high molecular compounds such as nylon, polystyrene, polyolefin, polyoxyxylene resin, fluororesin, polyester, polyamide, cellulose, and silver powder; red 104, red 106, and red 201 Organic pigments such as No., Red No. 202, Red No. 204, Red No. 226, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Green No. 3.

The powder of the composite body may be, for example, a case where a spherical nylon powder is coated with fine particles of titanium oxide, and a spherical polyoxyn resin powder is coated with a plate-shaped mica.

These can be used individually or in combination of 2 or more types.

Further, a powder in which part or all of the surface of the above-mentioned powder is subjected to hydrophilic treatment or hydrophobic treatment by a usual method may be used. The hydrophilic treatment can be carried out, for example, by using a hydrophilic treatment agent such as a hydrophilic polymer, a surfactant, an inorganic compound such as ceria or alumina. Further, the hydrophobic treatment can be carried out using a hydrophobic treatment agent such as a polyoxygenated oil or a derivative thereof, a fatty acid salt, a fluorine compound or an amino acid compound.

In the present invention, from the viewpoint of improving the stability of L-ascorbic acid 2-glycoside, the powder is preferably a hydrophobically treated powder, preferably treated with, for example, methyl polyoxyalkylene, talc, methyl poly The siloxane treatment of sericite, methyl hydrogen polyoxyalkylene treatment of talc, methyl hydrogen polyoxyalkylene treatment of sericite, and the like.

The content of the powder varies depending on the type thereof, but is usually 60% by mass or more, and more preferably 80% by mass or more based on the total amount of the powder cosmetic.

Further, the powder may be carried in a powder cosmetic in a stage in which the L-ascorbic acid 2-glycoside powder composition is produced in a step of dissolving L-ascorbic acid 2-glycoside and a pH adjusting agent in an aqueous solvent. It is used for the purpose of part or all of the powder used.

The amount of the powder at the time of carrying the solution is preferably from the viewpoint of stability of L-ascorbic acid 2-glycoside and industrial productivity, and the amount of the aqueous solvent to the amount of the powder is preferably 1: 2~1:30, better 1:3~1:20, especially good 1:3~1:10.

In the powder cosmetic of the present invention, in addition to the above components, for example, methyl p-oxybenzoate may be appropriately blended, and in the range which does not impair the effects of the present invention, Preservatives such as ethyl oxybenzoate, propyl p-oxybenzoate, butyl p-oxybenzoate; surfactants such as anionic surfactants, cationic surfactants, nonionic surfactants; animal and vegetable oils a liquid oil agent such as a hydrocarbon oil, an ester oil, a polyoxygenated oil, a fluorine oil or an ether oil; a solid oil such as an animal wax, a vegetable wax, a mineral wax or a synthetic wax; glycerin, 1, 3 - Polyols such as butanediol and polyethylene glycol; perfume; hyaluronic acid such as hyaluronic acid, collagen, ceramide, and royal jelly; and one or more types of vitamins such as vitamin E.

Further, in the present invention, an anti-inflammatory agent such as a whitening component other than L-ascorbic acid 2-glycoside, glycyrrhizic acid or a salt thereof, methylenebisbenzotriazolyl tetramethylbutylphenol, or the like may be appropriately formulated. One or two or more kinds of ultraviolet protection agents such as 2-ethylhexyl methoxycinnamate.

The powder cosmetic of the present invention can be produced by a usual method using an L-ascorbic acid 2-glycoside powder composition. In other words, the L-ascorbic acid 2-glycoside powder composition, the powder, and other additives as needed are uniformly mixed by a mixer and pulverized by a hammer mill. The particle size of the obtained powder cosmetic is 300 μm or less, and particularly preferably 150 μm or less.

In the present invention, the content of L-ascorbic acid 2-glycoside is not particularly limited, and is preferably from 0.1 to 10% by mass, more preferably from 0.1% to 10% by mass, based on the total amount of the powder cosmetic, from the viewpoint of whitening effect, safety, and feeling of use. 1 to 5 mass%.

Further, the residual ratio of L-ascorbic acid 2-glycoside in the powder cosmetic of the present invention is, for example, stored at a relative humidity of 75% at 40 ° C for 3 to 6 months. At least 80% or more, preferably 85% or more, more preferably 90% or more.

Further, the pH (25 ° C, 10 w/v% aqueous solution) of the powder cosmetic of the present invention is preferably 4 to 10 from the viewpoint of storage stability.

As the container for accommodating the powder cosmetic of the present invention, a plastic container, a glass container, a metal container or the like can be used.

The powder cosmetic of the present invention can also coexist with a desiccant in a container for the purpose of further improving the stability of L-ascorbic acid 2-glycoside over time.

Next, the aspects and preferred embodiments of the present invention will be described.

<1> A powder cosmetic comprising a L-ascorbic acid 2-glycoside powder composition obtained by dissolving L-ascorbic acid 2-glycoside in a water-based solvent and a pH adjuster, followed by drying the solution.

<2> The powder cosmetic according to the above <1>, wherein the L-ascorbic acid 2-glycoside powder composition is a solution in which the L-ascorbic acid 2-glycoside and the pH adjuster are dissolved, and further dispersed in the powder. Dryer.

<3> The powder cosmetic according to the above <2>, wherein the powder is one or more powders selected from the group consisting of inorganic powders, organic powders, and the like.

<4> The powder cosmetic according to the above <2>, wherein the powder is a hydrophobically treated powder.

<5> The powder cosmetic according to any one of <2> to <4> wherein the mass ratio of the amount of the aqueous solvent to the amount of the powder is from 1:2 to 1:30, preferably from 1:3 to 1. :20, better 1:3~1:10.

<6> The powder cosmetic according to any one of <1> to <5> above, wherein the pH is adjusted The whole agent is selected from the group consisting of citric acid, malic acid, succinic acid, fumaric acid, lactic acid, tartaric acid, acetic acid, hydrochloric acid, sulfuric acid, phosphoric acid, or the like, sodium hydroxide, potassium hydroxide, calcium hydroxide, Magnesium hydroxide, ammonia, 2-amino-2-methyl-1-propanol, diisopropanolamine, triisopropanolamine, triethanolamine, monoethanolamine, arginine, lysine, histidine And one or more of ornithine; preferably selected from the group consisting of sodium hydroxide, potassium hydroxide, 2-amino-2-methyl-1-propanol, triethanolamine, arginine, histidine And one or more of ornithine; more preferably one or more selected from the group consisting of potassium hydroxide, 2-amino-2-methyl-1-propanol, and arginine.

The powder cosmetic according to any one of the above-mentioned items, wherein the pH adjusting agent is prepared by dissolving a liquid of L-ascorbic acid 2-glycoside and a pH adjuster in an aqueous solvent. The pH (25 ° C) is 5 to 8 and particularly preferably pH 6 to 7.

The powder cosmetic according to any one of the above-mentioned items, wherein the aqueous solvent is an aqueous solution of water or an organic solvent, preferably an aqueous solution of water or a lower alcohol, more preferably water.

<9> A method for producing a powder cosmetic comprising: a step of dissolving L-ascorbic acid 2-glycoside and a pH adjuster in an aqueous solvent; and drying the obtained solution to produce L-ascorbic acid The step of the 2-glycoside powder composition.

<10> A method for producing a powder cosmetic comprising the step of dissolving L-ascorbic acid 2-glycoside and a pH adjuster in an aqueous solvent; The step of dispersing the obtained solution in the powder; and the step of producing the L-ascorbic acid 2-glycoside powder composition by drying the obtained powder containing the solution.

(Example)

Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto.

(Example 1)

2 g of L-ascorbic acid 2-glycoside (one pill PHARCOS Co., Ltd., the following), and 1.032 g of L-arginine (Pure Chemical Co., Ltd., the following) were mixed at room temperature to 2 g of purified water to dissolve . Then, 20 g of talc (Cornerfish Co., Ltd., the following is the same) was added to the previous solution and uniformly mixed, and then dried at 60 ° C for 10 hours to obtain 23.032 g of an L-ascorbic acid 2-glycoside powder composition.

(Example 2)

The solution was prepared in the same manner as in Example 1 except that 20 g of talc (Sankyo Chemical Co., Ltd., the same applies hereinafter) was used in place of talc, and then dried at 60 ° C for 10 hours to obtain 23.032. g-L-ascorbic acid 2-glycoside powder composition.

(Example 3)

The solution was prepared in the same manner as in Example 2 except that 1.022 g of L-arginine was used, and then dried at 60 ° C for 10 hours to obtain 23.022 g of an L-ascorbic acid 2-glycoside powder composition.

(Example 4)

The solution was prepared in the same manner as in Example 2 except that 1.042 g of L-arginine was used, and then dried at 60 ° C for 10 hours to obtain 23.04 g of an L-ascorbic acid 2-glycoside powder composition.

(Example 5)

The solution was prepared in the same manner as in Example 1 except that 0.39 g of potassium hydroxide (Tokyo Chemical Industry Co., Ltd., the following is the same) was used instead of L-arginine, and then dried at 60 ° C for 10 hours. 22.39 g of an L-ascorbic acid 2-glycoside powder composition was obtained.

(Example 6)

The solution was prepared in the same manner as in Example 2 except that 0.39 g of potassium hydroxide was used instead of L-arginine, and then dried at 60 ° C for 10 hours to obtain 22.39 g of L-ascorbic acid 2-glycoside powder composition. .

(Example 7)

The solution was prepared in the same manner as in Example 1 except that 0.5-g of 2-amino-2-methyl-1-propanol (ANGUS Chemical Company, the same applies hereinafter) was used instead of L-arginine. After drying at 60 ° C for 10 hours, 22.542 g of an L-ascorbic acid 2-glycoside powder composition was obtained.

(Example 8)

The solution was prepared in the same manner as in Example 2 except that 0.54 g of 2-amino-2-methyl-1-propanol was used instead of L-arginine, and then dried at 60 ° C for 10 hours to obtain 22.542. g-L-ascorbic acid 2-glycoside powder composition Things.

(Comparative Example 1)

2 g of L-ascorbic acid 2-glycoside, 0.3 g of citric acid anhydride, and 20 g of talc were treated with methyl polyoxyalkylene, and uniformly mixed by a mixer to obtain 22.3 g of a powdery composition.

(Comparative Example 2)

2 g of L-ascorbic acid 2-glycoside, 1.032 g of L-arginine, and 20 g of talc were treated with methyl polyoxyalkylene, and uniformly mixed by a mixer to obtain 23.032 g of a powdery composition.

[Evaluation method]

With respect to the L-ascorbic acid 2-glycoside powder composition produced in Examples 1 to 8 and the powdery composition produced in Comparative Examples 1 and 2, (1) L-ascorbic acid 2-glycoside (AA2G) was measured by the following method. Residual rate and (2) Ph. The results are shown in Table 1.

(1) Determination of the residual rate of AA2G

5 g of the powder was placed in a plastic container and stored in a thermostat bath at 40 ° C × 75% RH according to the state of the closed lid, and the residual ratio of AA2G after one month and three months was obtained. The residual ratio was measured by HPLC method. The measurement method was carried out by using the measurement method of the food-based ketone hair No. 0513003, using an octadecyl thiolated cerium oxide gel (Shimadzu Corporation) and a photodiode array detector (Shimadzu Corporation).

(2) Determination of pH

Examples 1-8 are used to measure L-ascorbic acid 2-glycoside and pH in the manufacture. The pH of the solution in which the regulator was dissolved in the purified water (25 ° C). Further, in Comparative Examples 1 and 2, the pH (25 ° C) of an aqueous solution obtained by adding 1 g of the composition after production to 10 mL of purified water was measured. Further, the pH meter was manufactured by Horiba, Ltd. (pH meter F-53).

From the compositions of Table 1 and Comparative Examples 1 and 2, it was confirmed that the content of the AA2G with time was lowered, and the residual ratio was lowered to about 70% after storage for 3 months.

On the other hand, the L-ascorbic acid 2-glycoside powder compositions of Examples 1 to 8 confirmed the high stability of AA2G even after storage for 3 months. In particular, in Examples 2 to 4, 6 and 8 in which the hydrophobically treated powder was used, the residual ratio of AA2G was particularly high.

(Example 9) (whitening body powder)

20 g of L-ascorbic acid 2-glycoside and 10.32 g of L-arginine were mixed at 50 ° C and dissolved in 20 g of purified water. Next, 200 g of methyl polyoxyalkylene-treated talc was added to the previous solution and uniformly mixed, and then dried at 60 ° C for 10 hours to obtain 230.32 g of a powder composition.

The powder composition obtained above, methyl polyoxyalkylene treatment, low-temperature sintering of zinc oxide 200 g, methyl hydrogen polyoxymethane treatment of fine particle titanium oxide 200 g, methyl polyoxyalkylene treatment sericite 92.68 g, methyl poly 100 g of talc-treated talc, 3 g of methyl p-oxybenzoate, and 1 g of dipotassium glycyrrhizinate were uniformly mixed in a mixer, and then pulverized by hammer milling. Thereafter, 170 g of mica titanium and 3 g of iron-coated mica titanium were added, and uniformly mixed by a mixer to obtain 1,000 g of whitening body powder.

[Evaluation method]

With respect to the powder cosmetic produced in Example 9, (1) AA2G residual ratio and (2) pH were measured by the following methods. The results are shown in Table 2.

(1) Determination of the residual rate of AA2G

Put 5g of powder cosmetic into a plastic container and in the state of closing it The temperature was kept at 40 ° C × 75% RH, and the residual rate of AA2G was obtained after 1 month, 3 months, and 6 months. The residual ratio was measured by the HPLC method in the same manner as above.

(2) Determination of pH

The pH (25 ° C) of a solution in which L-ascorbic acid 2-glycoside and L-arginine were dissolved in purified water in the production was measured, and 1 g of the powder cosmetic after the production was added to 10 mL of the purified water, and the aqueous solution was stirred. pH (25 ° C). Further, the pH meter was manufactured by Horiba, Ltd. (pH meter F-53).

As a result of Table 2, the powder cosmetic of Example 9 retained the residual ratio of 90% or more after 6 months of storage, and confirmed the high stability of AA2G.

Claims (7)

A powder cosmetic comprising a L-ascorbic acid 2-glycoside powder composition obtained by dissolving L-ascorbic acid 2-glycoside in a water-based solvent and a pH adjuster, followed by drying the solution. The powder cosmetic according to the first aspect of the invention, wherein the L-ascorbic acid 2-glycoside powder composition further dissolves the dissolved solution of the L-ascorbic acid 2-glycoside and the pH adjuster in the powder, and then performs Dryer. A powder cosmetic according to claim 2, wherein the powder is a hydrophobically treated powder. The powder cosmetic according to any one of claims 1 to 3, wherein the pH adjusting agent is selected from the group consisting of potassium hydroxide, 2-amino-2-methyl-1-propanol and arginine 1 Kind or more than two. The powder cosmetic according to any one of claims 1 to 3, wherein the aqueous solvent is water. A method for producing a powder cosmetic comprising: a step of dissolving L-ascorbic acid 2-glycoside and a pH adjuster in an aqueous solvent; and drying the obtained solution to produce L-ascorbic acid 2-glycoside The step of the powder composition. A method for producing a powder cosmetic, comprising: a step of dissolving L-ascorbic acid 2-glycoside and a pH adjuster in an aqueous solvent; and dispersing the obtained solution in the powder; and The step of producing a powder of L-ascorbic acid 2-glycoside powder by drying the powder containing the solution.