Methylprednisolone Acetate EP Impurity K

JR-ST1004-02

Variant ofMethylprednisolone Acetate EP CRS

11-Keto Methylprednisolone acetate (17-hydroxy-6α-methyl-3,11,20-trioxopregna-1,4-dien-21-yl acetate / 6α-methylprednisone 21-acetate); C-11 oxidative impurity of methylprednisolone acetate for chromatographic impurity profiling.

Structure & identifiers

2D structure — select to enlarge

Catalogue code

JR-ST1004-02

Category

Corticosteroids

CAS number

115321-98-7

Grade

Impurity reference standard

Pharmacopoeia

Ph. Eur.

Molecular formula

C24H30O6

Molecular weight

414.50 g/mol

Pack sizes

25 mg · 50 mg · 100 mg · 500 mg

Record updated

12 Nov 2026

Chemical name

Methylprednisolone Acetate EP Impurity K

SMILES

CC(=O)OCC(=O)[C@@]1(O)CC[C@H]2[C@@H]3C[C@H](C)C4=CC(=O)C=C[C@]4(C)[C@H]3C(=O)C[C@]12C