Prednisolone ≥97.0% BP/EP Hormone API made in china CAS NO.50-24-8

Appearance 

White or almost white，crystalline，hygroscopic powder

Identification 

IR:Conforms to the CRS spectrum

UV:Absorptivities a 242nm，calculated on the dried basis,do not differ by more than 2.5%

Specific rotation

+97°~ +103°

Loss on drying 

≤1.0%

Residue on ignition

Negligible，from 100mg

Selenium 

0.003%.200mg test specimen being used

Chromatographic purity（HPLC)

Any individual impurity≤1.0%

≥0.5% impurity not more than one

Total impurities≤2.0%

Assay （by HPLC)

Contains 97.0%~102.0% of C21H28O5 Calculated on anhydrous basis  

Residual solvents

Methanol≤3000ppm

Ethanol≤3000ppm

Methylene≤600ppm

Particle size

99%≤30µm