Appearance | Colorless crystals or white crystalline powder |
Identification | Conform |
Identification A+B | Passes Test |
Heat stability | No discoloration (105ºC) |
Assay( dry weight basis,%) | 99~101.0 |
Water | ≤0.5% |
Melting range | 133-135ºC |
Residue on ignition(%) | ≤0.2 |
Sublimation point | 80ºC |
Ph VALUE(10% water solution) | 3-3.5 |
Heavy Metals(as Pb)(mg/kg) | ≤10 |
Arsenic (as As)(mg/kg) | ≤2 |
Lead(mg/kg) | ≤2 |
Mercury(mg/kg) | ≤0.1 |
Aldehyde(as Formaldehyde) | ≤0.1% |
Mesh size | 60-80 mesh |
Organic volatile impurities | Meets the requirements |
Residual solvents | Meets the requirements |