CAS number： 50-81-7
Molecular formula：
molecular weight：
Chemical structure：
| Product name: | Ascorbic Acid |
|
| Expiry Date: | Three years |
|
| Inspection Standard: | BP2013, E300, USP36, FCC8, EP 7. |
|
| Tests | Standards | Results |
| Appearance | White crystalline powder | White crystalline powder |
| Identification | Positive | Positive |
| Clarity of solution | Clear | Clear |
| Color of solution | ≤BY7 | <by7< td=""> |
| Assay | 99.0~100.5% | 99.5% |
| Loss on Drying | ≤0.4% | 0.05% |
| Residue on ignition | 0.1% | 0.03% |
| Sulphate Ash | 0.1% | 0.03% |
| Specific rotation | +20.5°～+21.5° | +20.92°? |
| pH(with 2% water solution） | 2.4-2.8 | 2.59 |
| PH(with 5% water solution） | 2.1-2.6 | 2.35 |
| Melting range | About 190℃ | 191℃ |
| Heavy metals | ≤3ppm | <3ppm< td=""> |
| Iron | ≤2ppm | <2ppm< td=""> |
| Copper | ≤5ppm | <5ppm< td=""> |
| Impurity E | ≤0.2% | <0.2%< td=""> |
| Arsenic | ≤1ppm | <1ppm< td=""> |
| Lead | ≤2ppm | <2ppm< td=""> |
| Cadmium | ≤1ppm | <1ppm< td=""> |
| Mercury | ≤1ppm | <1ppm< td=""> |
| Organic volatile impurities | Meets the requirements | conform |
| Related Substances | ImpurityC≤0.15% | Complies |
| ImpurityD≤0.15% | ||
| Any Other Unspecific Impurities | ||
| Impurity≤0.10% | ||
| Total Impurity≤0.2% | ||
| Total Plate Count | ≤1,000cfu/g | <1,000cfu/g |
| Conclusion: According to BP2013, E300, USP36, FCC8, EP 7. | ||