Customization: | Available |
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CAS No.: | 50-81-7 |
Formula: | 176.12 |
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INCI Adopted Name: | ASCORBIC ACID |
CAS No.: | 50-81-7 |
EINECS No. | 200-066-2 |
Molecular Formula: | C6H8O6 |
Molecular Weight: | 176.12 |
Synonyms: | Vitamin C l-ascorbic acid |
Test Item | Specification |
Characteristics | White or almost white crystals crystalline powder |
Identification | Positive reaction |
Melting point | About 190ºC |
PH (with 2% water solution) | 2.4-2.8 |
Ph (with 5% water solution) | 2.1-2.6 |
Clarity of solution | Clear |
Color of solution | ≤BY7 |
Copper | ≤5ppm |
Heavy metals | ≤10ppm |
Hg | ≤0.1mg/kg |
Lead | ≤2mg/kg |
As | ≤3ppm |
Oxalic Acid | ≤0.2% |
Iron | ≤2ppm |
Impurity E | ≤0.2% |
Loss of drying | ≤0.4% |
Sulphate ash (residue on ignition) | ≤0.1% |
Specific Optical Rotation | +20.5--+21.5 |
Residual solvents | Pass |
Assay | 99.0%--100.5% |