Kojic acid easily dissolves in water, alcohol and acetone, slightly dissolves in ether, ethyl acetate, chloroform and pyridine, does not dissolves in benzene. Toxicity test data: LD502500-3500mg/kg. It is a natural product, which is used as a food additive and preservative, in cosmetics as a skin-whitening agent, as a plant growth regulator and as a chemical intermediate. 1.Whitening agent in cosmetic:Skin color is determined by the quantity of melanin in the skin. Melanin is biosynthesized in the melanosome of the melanocyte - a process involving the presence of the enzyme tyrosinase. Kojic acid is known to inhibit tyrosinase thereby reducing the production of melanin. Kojic acid is primarily used in cosmetics for its skin lightening effect. Kojic acid successfully reduces age spots and pigmentation on face and body, astypically caused by sun damage. Kojic acid is known to have an anti-microbial effect and macula effectively without any toxic and bad results, At present, kojic acid's use level added in comestics is to O.2-1.0 percent. 2.Medicine material:Kojic acid and its derivatives are used as an important material in antibiotic - cephamycin, anodyne, and antiphlogistic production. 3.Food additive:Kojic acid and its derivatives work as antiseptic, antioxidant, preservative and color stablizer in meat processing, also act as useful materials of food aromatizer - maltol and ethylmaltol. 4.Preservative and color stablizer of cut-flower:Kojic acid and its derivatives are added to cut-flower to keep flower colorful and fresh. 5.Film despecking agent and iron ananysis reagent. 6.Non-toxic to person and livestock, pollution-free pesticide ininsecticide production.