Description White or almost white powder Conforms
Melting piont 134~137°C 135.5~136.0°C
Identification (1) IR (2) UV Conforms
Optical rotation -0.10°~+0.10 0.00°
Loss on drying less than 0.5% 0.27%
Ordinary impurities Single impurity≤0.2% 0.16%
Total impurities≤0.5% 0.48%
Total impurities≤0.5% 0.48%
Residual solvent toluene≤0.01% Conforms
Sulphated ash ≤0.1% Conforms
Assay 99.0%~101.0% 99.5%