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Kojic Acid & Kojic Acid dipalmitate
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1. Kojic Acid
Chemical name:5-hydroxyl-2-hydroxymethyl-1,4-pyrone. It is a white needle-like crystals. It easily dissolves in water, alcohol & aceton, and slightly dissolves in ethyl acetate, chloroform, etherand pyridine. Kojic acid does not dissolve in benzene.
Molecular weight: 142.1
Cas no: 501-30-4
Melting point: 153-156C
Molecular formula: C6H6O4?
Toxicity test data: LD502500-350Omg/kg.
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Usages
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(1) Daily chemicals material:
Because Kojic acid can inhibits caseinase activity, then inhibits skin melanin formation, kojic acid and it's derivatives widely used in high-quality skin lightening cosmetics, bath preparation and mouth or teeth care products. Cosmetics containing kojic acid can treat freckle,acne, pigmentation and macula effectively without any toxic and bad results, At present, kojic acid's use level added in cosmetics is to 0.2-1.0 percent.
(2) Medicine material:
Kojic acid and it's derivatives are used as an important material in antibiotic - cephamycin, anodyne, and antiphlogistic production.
(3) Food additive:
Kojic acid and it's 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 it's 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
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Specification
Appearance white or off white crystals
Assay: 99.0% min
Loss on drying: 0.5% max
Residue on ignition: 0.1% max
Iron: 10ppm max
Heavy metals (Pb): 3ppm max
Arsenic: 1ppm max
Chlorides: 50ppm max
clarity of solution colorless and transparent
Pathootens none<(undetected)
Melting point: 153 -156C
PH: 3.5-5.5
Solubility:Soluble in water
Count of bacteria:<300/g
Coliform:Negative
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2.Kojic Acid dipalmitate
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Speciality
Kojic dipalmitate is modified kojic acid derivative, which not only overcomes the instability to light, heat and metallic ion, but keeps the inhibitory tyrosinase activity and prevents the forming of melanin.
Molecular formula: C38H66O6
CAS No: 79725-98-7
Molecular weight: 618.9
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Usages
Kojic dipalmitate owns stable chemical property. It will not turn yellow for oxidation, metallic ion, illumination and heating. As fat soluble skin whitening agent, it is easier to be absorbed by skin.
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Specification
Appearance white sheet crystals
Assay 98.0% min
Melting point 92-96°C
Loss on drying 0.5% max
Residue on ignition 0.5% max
Heavy metals 10ppm max
Arsenic 2.0ppm max
Color reaction of ferric chloride Negative
Pathogen bacteria:<300CPU
Fungus: <100CPU