Triamcinolone Acetonide EP Impurity C

JR-ST1002-02

Variant ofTriamcinolone Acetonide IP CRS

Triamcinolone acetonide 21-aldehyde hydrate (9-fluoro-11β,21,21-trihydroxy-16α,17-(1-methylethylidenedioxy)pregna-1,4-diene-3,20-dione); C-21 oxidative degradation impurity of triamcinolone acetonide used for compendial impurity profiling.

Structure & identifiers

2D structure — select to enlarge

Catalogue code

JR-ST1002-02

Category

Corticosteroids

CAS number

161740-69-8

Grade

Impurity reference standard

Pharmacopoeia

Ph. Eur.

Molecular formula

C24H31FO7

Molecular weight

450.50 g/mol

Pack sizes

25 mg · 50 mg · 100 mg · 500 mg

Record updated

12 Nov 2026

Chemical name

Triamcinolone Acetonide EP Impurity C

SMILES

CC1(C)O[C@@H]2C[C@H]3[C@@H]4CCC5=CC(=O)C=C[C@]5(C)[C@@]4(F)[C@@H](O)C[C@]3(C)[C@]2(C(=O)C(O)O)O1