Kojic Acid
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℃.
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Item
|
Specification
|
Results
|
|
Appearance
|
White or off white crystal
|
off white crystal or powder
|
|
Purity（%）
|
99.0min
|
99.50
|
|
Melt point(℃)
|
152-156
|
153.1-154.0
|
|
Loss on Drying（%）
|
1max
|
0.31
|
|
Residue on Ignition（%）
|
0.2max
|
0.09
|
|
(pb)（ppm）
Heavy Metals
|
3max
|
＜0.10
|
|
Iron
(ppm)
|
10max
|
7.00
|
|
Arsenic
(ppm)
|
1max
|
＜0.10
|
|
Chloride
(ppm)
|
100max
|
25
|
|
Conclusion
|
up to grade
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|
