Kojic acid, (formal name: 5-hydroxy-2-hydroxymethyl-1, 4-pyrone) is a kind of subacid organic compound made in microbial fermentation.
Kojic acid is white or off-white needle-like crystals, easily dissolved in water, alcohol and acetone; slightly dissolved in ether, ethyl acetate, chloroform and pyridine; and undissolved in benzene. The molecular formula is C6H6O4; molecular weight is 142.1; melting point is 153~156℃. CAS: 501-30-4.
Appearance: white or off-white needle-like crystals
Purity: 99.0% min
Melting point: 153-156C°
Residue on ignition: 0.1%max
Heavy metals: 3ppm max
Chlorides: 50ppm max
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