Items | Specification |
Appearance | Colorless crystals or white crystalline powder |
Identification | Conform |
Identification A+B | Passes Test |
Heat stability | No discoloration (105℃,90min) |
Assay | 99.0-101.0% |
Water | ≤ 0.5% |
Melting range | 133-135 ℃ |
Residue on ignition | ≤ 0. 2 % |
Sublimation point | 80℃ |
pH value(10 % water solution) | 3 – 3.5 |
Aldehyde (as Formaldehyde) | ≤ 0,1% |
Lead (Pb) | ≤ 2 mg/kg |
Heavy Metals (as Pb) | ≤ 10 mg/kg |
Arsenic(as As) | ≤ 2 mg/kg |
Mercury (Hg) | ≤ 0.1 mg/kg |
Mesh size | 60-80 mesh |
Organic volatile impurities | Meets the requirements |
Residual solvents | Meets the requirements |