Clobetasol propionate

[Product name]: Clobetasol propionate
[Chemical name]: 21-Chloro-9-fluoro-11β-hydroxy-16β-methyl-3,20-dioxopregna-1,4-diene-17-yl propanoate
[Product category]： corticosteroids
[CAS NO.] 25122-46-7
[molecular formula]:  C25H32CIFO5
[molecular weight]: 467.0
[Packing specification]: 1KG/tin 
[specification]: CP/USP/BP
[Appearance]: almost white to light yellow crystalline powder
[Melting point]:190℃ ~197℃
[specific rotation]: +99°~+105?
[related substance]:single impurity≤1.0%, total impurities ≤2.5%
[loss on drying]: ≤0.5%
[assay]: calculate content of C25H32CIFO5 , 97.0%~103.0%
[chemical formulation]: store in airtight container, protected from light.