| Customization: | Available |
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| CAS No.: | 50-81-7 |
| Formula: | C6h8o6 |
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Ascorbic acid CAS 50-81-7 It is a water-soluble vitamin that is abundant in fruits and vegetables.
25kg/carton
| Item | Standard |
| Appearance | White or almost white, crystalline powder or colourless crystals. |
| Identification | Positive reaction. |
| Specific optical rotation | +20.5°~+21.5° |
| pH(with 5% water solution) | 2.1~2.6 |
| pH(with 2% water solution) | 2.4~2.8 |
| Impurity E | ≤0.20% |
| Clarity of solution | Clear |
| Colour of solution | ≤BY7 |
| Assay(C6H8O6) | 99.0%~100.5% |
| Melting point | 190~192ºC |
| Impurities C, D | ≤0.15% |
| Unspecified impurities (each impurity) | ≤0.10% |
| Sum of impurities other than C and D | ≤0.20% |
| Particle size distribution | ≥95.0% through #20 mesh |
| Particle size distribution | ≤30.0%through #100 mesh |
| Residue on ignition | ≤0.1% |
| Loss of Drying | ≤0.4% |
| Heavy metal | ≤10.0 mg/kg |
| Iron | ≤2.0 mg/kg |
| Copper | ≤5.0 mg/kg |
| Lead | ≤0.5 mg/kg |
| As | ≤1.0 mg/kg |
| Cd | ≤0.5 mg/kg |
| Hg | ≤0.1 mg/kg |
| Residual Solvents(as methanol-) | ≤3000 mg/kg |
| Total Plate Counts | ≤1000 cfu/g |
| Yeasts and Moulds | ≤100 cfu/g |
| Escherichia coli | Negative in 10g |
| Salmonella | Negative in 25g |
| Staphylococcus Aureus | Negative in 25g |
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