| Customization: | Available |
|---|---|
| CAS No.: | 50-81-7 |
| Formula: | C6h8o6 |
|
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| Items | Requirements | Result |
| Appearance | White or almost white, crystalline powder or colourless crystals. | Qualified |
| Identification | Positive reaction | Qualified |
| Assay(C6H8O6) | 99.0%~100.5% | 99.8% |
| Specific optical rotation | +20.5ºC~+21.5ºC | +20.8ºC |
| PH (with 2% water solution) | 2.4~2.8 | 2.6 |
| PH (with 5% water solution) | 2.1~2.6 | 2.4 |
| Clarity of solution | clear | clear |
| Colour of solution | ≤BY7 | 7 |
| Residue on ignition | ≤0.1% | <0.1% |
| Melting point | 190~192ºC | 191ºC |
| Particle size | ≥95.0% through #20 mesh | 100% |
| ≤30.0% through # 100 mesh | 15.3% | |
| Heavy metal | ≤10.0mg/kg | Conform |
| Iron | ≤2.0mg/kg | Conform |
| Copper | ≤5.0%mg/kg | Conform |
| Lead | ≤0.5%mg/kg | Conform |
| Cadmium(Cd) | ≤0.5mg/kg | Conform |
| Impurity E | ≤0.20% | Conform |
| Impurities C, D | ≤0.15% | Conform |
| Unspecified impurities (each impurity) |
≤0.10% | Conform |
| Sum of impurities other than C and D | ≤0.20% | Conform |
| Residual solvents | ≤3000mg/kg | Conform |
| Loss on drying | ≤0.4% | Conform |
| Total plate counts | ≤1000cfu/g | Conform |
| Yeasts and moulds | ≤100cfu/g | Conform |
| Escherichia coli | Negative in 10g | Conform |
| Salmonella | Negative in 25g | Conform |
| Staphylococcus aureus | Negative in 25g | Conform |
| Conclusion | Conform to the standard USP42. | |
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