Hydrocortisone butyrate

[Product name]: Hydrocortisone butyrate
[Chemical name]: (11β)-11,17,21-tridroxy-pregna-4-ene-3,20-dione-17α-butyrate
[Product category]： corticosteroids
[CAS NO.] 13609-67-1
[molecular formula]:  C25H36O6
[molecular weight]: 432.55
[Packing specification]: 1KG/tin, 5KG/tin
[specification]: CP/ USP
[Approval No.]: Guo yao Zhuan Zi H10940028
[Appearance]: white or almost white crystalline powder, odorless 
[Identification]: it should be positive 
[Melting point]:197℃~208℃
[specific rotation]: +47°~+54°
[related substance]:any impurity≤1.0%, total impurities≤2.0%
[loss on drying]: ≤0.5%
[residue on ignition]: ≤0.1%
[assay]: calculate on dried basis 97.05~102.0%
[storage]: store in airtight container, protected from light