Appearance

 Light-yellow to white crystalline powder

Off-white crystalline powder

Specific Rotation

(on dried basis, 5% solution in methanol)

 +4.0°~+8.0°           

+7.42°

Identification

HPLC/UV               

Complies

Related Substances

 Total impurities: NMT 1.0%

Maximum single impurity: NMT 0.5%          

0.93%

0.47%

Loss on Drying

(Dry it at 105°C in an electric air blowing dryer till a constant weight) 

Not more than 1.0%

0.14%

Residue on Ignition

Not more than 0.1%

0.07%

Heavy Metal

Not more than 20ppm

Less than 20ppm

Assay(on dried basis)

Not less than 98.5%

99.49%