Superiority:
Appearance White crystalline powder, odorles
Assay 98.0~102.0%
Water ≤3.0%
Sulphated ash ≤0.1%
Heavy metals ≤20ppm
Specific rotation -42.0~-48.0º
Solubility Freely soluble in chloroform .Soluble in ethanol,ethyl acetate and acetone.Practically insoluble in water
Identification a) UV:λmax233nm
b) IR :Concordant with R.S
c) HPLC: tR Concordant with R.S
Related substance single≤0.5%
total≤1.5%
Residual organic solvents a) Dichloromethane:0.06%max
b)Hexane:0.029%max
c)Acetone:0.5%max
d)Ethyl acetate:0.5%max
e)Methanol:0.3%max
Details:
Appearance White crystalline powder, odorles
Assay 98.0~102.0%
Water ≤3.0%
Sulphated ash ≤0.1%
Heavy metals ≤20ppm
Specific rotation -42.0~-48.0º
Solubility Freely soluble in chloroform .Soluble in ethanol,ethyl acetate and acetone.Practically insoluble in water
Identification a) UV:λmax233nm
b) IR :Concordant with R.S
c) HPLC: tR Concordant with R.S
Related substance single≤0.5%
total≤1.5%
Residual organic solvents a) Dichloromethane:0.06%max
b)Hexane:0.029%max
c)Acetone:0.5%max
d)Ethyl acetate:0.5%max
e)Methanol:0.3%max