Appearance:White fine crystalline powder

Identification :IR,UV conform

Solubility:Very slightly soluble in water, in acetone, in chloroform, and in alcohol; soluble in methanol. Melts at about 142℃，with decomposition

Loss on drying:0.23%

Residue on ignition:0.06%

Iron :0.0017%

Heavy metals:0.0006%

Total impurities:0.30%

Individual impurity:0.16%

E-isomer:0.23%

Residual solvents:0.5% max

Acetone:0.2%(G/G)

Assay :99.76%