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Detailed introduction to Ascorbic acid.:
SPECIFICATION:
|
Properties |
Specification |
|
Appearance |
white crystalline powder |
|
Identification |
Positive Reaction |
|
Clarity of solution |
Clear |
|
Assay |
99.0-100.5% |
|
Melting Point |
187℃-192℃ |
|
PH |
2.1-2.6 |
|
Colour of Solution |
Max.BY7 |
|
Copper |
Max.5ppm |
|
Heavy Metals |
Max.20ug/g as Pb |
|
Iron |
Max.2ppm |
|
Oxalic Acid |
Max.0.2% |
|
Loss on drying |
Max.0.4% |
|
Residue on ignition |
Max.0.1% |
|
Specific Rotation |
+20.5℃-+21.5℃ |
|
Organic Volatile Impurities |
Pass test |
|
Arsenic |
Max.20ug/g as AS2O3 |
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