ITEMS | STANDARDs | ||
Appearance | White, colourless, crystalline powder | ||
Identification | Pass test | ||
Assay (C10H16N2O8) | ≥ 99.0% | ||
Chloride (Cl) | ≤ 0.01% | ||
Sulphate (SO4) | ≤ 0.05% | ||
pH (saturated solution) | 2.5- 2.9 | ||
Ferrum (Fe) | ≤ 10 mg/kg | ||
Lead (Pb) | ≤ 5 mg/kg | ||
Arsenic (As) | ≤ 3 mg/kg | ||
Mercury (Hg) | ≤ 1 mg/kg | ||
Heavy metals (as Pb) | ≤ 10 mg/kg |