Dexamethasone sodium phosphate

[Product name]: Dexamethasone sodium phosphate
[Chemicalname]:9-fluoro-11β,17-dihydroxy-l6α-methyl-3,2Cdioxopregna-l,4-dien-2l-yl disodium phosphate
[Product category]： corticosteroids
[CAS NO.] 2392-39-4
[molecular formula]:  C22H28FNa2O8P
[molecular weight]: 516.4
[Packing specification]: 1KG/tin 
[specification]: CP/EP/USP/BP 
[Approval No.]: Guo yao Zhun Zi H12020198
Quality specification
CP2005
[Appearance]: white or light yellow powder, odorless，tasted bitter, hygroscopic 
[Identification]: it should be positive 
[specific rotation]: +72°～+80°
[alkali value]: PH 7.5~10.5
[free state phosphate ]: light absorptive should be less than reference solution 
[clarity and color]: the solution should be colorless and clear. If not, it should not be more concentrated than standard solution; if color turns it should not be deeper than standard solution.  
[related substance]: dexamethasone≤0.5%, any other single impurity≤0.5%, other total impurities≤2.0%. 
[loss on drying]: ≤16.0%
[residual solvent]: acetone ≤0.5%, methanol ≤0.3%
[assay]: calculated on dried basis, C22H28FNa2O8P, should be 96.0%～102.0%
[Storage]: protected from light, store in a airtight container and place in a dry place