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CorticosteroidsIn stockImpurity reference standardPh. Eur.

Dexamethasone EP Impurity B

JR-ST1007-01

Variant ofDexamethasone EP CRS

Betamethasone (9-fluoro-11β,17,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione); C-16β epimer of dexamethasone (Dexamethasone EP Impurity B) used for chromatographic resolution and impurity testing.

Structure & identifiers

2D structure — select to enlarge

Catalogue code
JR-ST1007-01
Category
Corticosteroids
CAS number
378-44-9
Grade
Impurity reference standard
Pharmacopoeia
Ph. Eur.
Molecular formula
C22H29FO5
Molecular weight
392.47 g/mol
Pack sizes
25 mg · 50 mg · 100 mg · 500 mg
Record updated
12 Nov 2026

Chemical name

Dexamethasone EP Impurity B

SMILES

C[C@@H]1C[C@H]2[C@@H]3CCC4=CC(=O)C=C[C@]4(C)[C@@]3(F)[C@@H](O)C[C@]2(C)[C@@]1(O)C(=O)CO

Compound identity, CAS number, formula and structure are referenced from public chemical databases. Contact us to confirm availability, pack sizes and documentation for your order.

Dexamethasone EP Impurity B

25 mg · ×1