Essential details
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Product Introduction
| Parameter Category | Details |
|---|---|
| Chemical Name | Kojic Acid (5-Hydroxy-2-hydroxymethyl-4-pyrone) |
| CAS Number | 501-30-4 |
| Chemical Formula | \(\ce{C6H6O4}\) |
| Molecular Weight | 142.11 g/mol |
| Appearance | White to pale yellow crystalline powder |
| Odor | Odorless |
| Solubility | Soluble in water, ethanol, acetone, and ethyl acetate; slightly soluble in ether and chloroform |
| Melting Point | 152–154 °C |
| Purity (Cosmetic Grade) | ≥99.0% |
| pH Value (1% aqueous solution) | 3.0–4.0 |
| Stability | Sensitive to light, heat and metal ions (especially Fe³⁺, Cu²⁺); prone to oxidation and discoloration in neutral/alkaline conditions; stable under acidic pH (3.0–5.0) |
| Storage Condition | Store in a cool, dry, dark place; sealed container; avoid contact with metal containers; shelf life up to 2 years |
