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