| 摘要 |
PROBLEM TO BE SOLVED: To obtain a stabilized composition having skin bleaching, anti-oxidant and elasticity imparting abilities, etc., preventing discoloration and precipitation, having extremely reduced restriction of compounding composition, excellent water solubility and stability with time by using a specific gallic acid derivative. SOLUTION: This composition uses at least one selected gallic acid derivatives of the formula (R1 is H, an alkali metal, an alkaline earth metal, an ammonium salt, a 1-18C alkyl or alkenyl; R1 to R4 are each H, OH, a 1-18C alkyoxy, a polyoxyethylene, a polyoxypropylene, a monosaccharide, a disaccharide or an oligosaccharide residue) (e.g. gallic acid methyl ester-3- glucoside, etc.). The compound of the formula is obtained, for example, by using gallic acid or its ester derivative, etc., a saccharide containing an acethylated hydroxy group or a saccharide halogenated at the anomer position as starting raw materials. The objective composition contains preferably 0.05-10 wt.% of the compound of formula.
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