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CorticosteroidsIn stockAPI reference standardPh. Eur.

Prednisone EP CRS

JR-ST1016

European Pharmacopoeia (EP) Chemical Reference Substance of Prednisone (17,21-dihydroxypregna-1,4-diene-3,11,20-trione); 11-keto corticosteroid API standard and related impurity in prednisolone monographs.

Structure & identifiers

2D structure — select to enlarge

Catalogue code
JR-ST1016
Category
Corticosteroids
CAS number
53-03-2
Grade
API reference standard
Pharmacopoeia
Ph. Eur.
Molecular formula
C21H26O5
Molecular weight
358.43 g/mol
Pack sizes
25 mg · 50 mg · 100 mg · 500 mg
Record updated
12 Nov 2026

Chemical name

Prednisone EP CRS

SMILES

C[C@]12CC(=O)[C@H]3[C@@H](CCC4=CC(=O)C=C[C@]43C)[C@@H]1CC[C@]2(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.

Prednisone EP CRS

25 mg · ×1