Kojic acid powder CAS 501-30-4 USP/BP grade is a natural fermentation-derived crystalline powder, well-known as tyrosinase inhibitor widely used in cosmetic whitening formulations, food antioxidant and chemical intermediate. TNJ Chemical is a professional manufacturer and exporter since 2001. We guarantee high-quality products, competitive price and thoughtful service. If you want to buy or have any other inquiries, please contact sales@tnjchem.com
Product Information
Chemical Name 5-Hydroxy-2-(hydroxymethyl)-4H-pyran-4-one
CAS No. 501-30-4
Alias Kojic acid, 2-Hydroxymethyl-5-hydroxy-γ-pyroneMolecular Formula C₆H₆O₄
Molecular Weight 142.11
EINECS 207-922-4Grade Cosmetic grade, Food grade
Chemphysical Properties
Appearance White to off-white crystalline powder
Odor Odorless or slight characteristic odor
Melting point 152~155 ℃
Solubility Freely soluble in water, ethanol, acetone; slightly soluble in ether
Stability Sensitive to light and heat, easy to turn yellow under UV exposure
Quality Specification
| Test Item | USP Specification |
|---|---|
| Assay (HPLC) | 98.5% ~ 101.5% |
| Loss on drying | ≤0.5% |
| Residue on ignition | ≤0.1% |
| Chloride | ≤50 ppm |
| Iron (Fe) | ≤10 ppm |
| Heavy metals (as Pb) | ≤3 ppm |
| Arsenic (As) | ≤1 ppm |
| pH (1% aqueous solution) | 3.0 ~ 5.0 |
| Identification | Complies |
Application & Use
Cosmetics & personal care: Skin whitening active ingredient, inhibits tyrosinase to reduce melanin, added in whitening serum, cream, mask and spot care products.
Food industry: Antioxidant and color retention agent, prevent browning for fruits, vegetables and meat products.
Chemical & pharmaceutical: Organic synthesis intermediate, metal chelating agent.Industrial use: Bleaching auxiliary for textile and leather.
Packing Delivery & Storage
Packing: 25kg fiber drum / 1kg aluminum foil bag for sample
Storage: Keep tightly sealed, store in cool, dry and dark warehouse. Avoid sunlight and high temperature.
Shelf life: 24 months under proper storage.
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