Betamethasone 21-acetate

醋酸倍他米松

Also known as: Betamethasone acetate, 9α-Fluoro-16β-methyl-11β,17α,21-trihydroxy-1,4-pregnadiene-3,20-dione 21-acetate, 21-Acetyloxy-9-fluoro-11β,17-dihydroxy-16β-methylpregna-1,4-diene-3,20-dione, Pregna-1,4-diene-3,20-dione, 21-(acetyloxy)-9-fluoro-11,17-dihydroxy-16-methyl-, (11β,16β)-

Betamethasone 21-acetate (CAS 987-24-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C24H31FO6 and a molecular weight of 434.498 g/mol. It is also known as Betamethasone acetate, 9α-Fluoro-16β-methyl-11β,17α,21-trihydroxy-1,4-pregnadiene-3,20-dione 21-acetate and 21-Acetyloxy-9-fluoro-11β,17-dihydroxy-16β-methylpregna-1,4-diene-3,20-dione. Key properties include a melting point of 200-220°C (dec.), a boiling point of 579.4±50.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 304.2±30.1 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

987-24-6

Jingsj CID

J-37840-2

Molecular Formula

C₂₄H₃₁FO₆

Chinese Name

醋酸倍他米松

Molecular Weight

434.498 g/mol

Category

Organic Acids

Last updated

8/21/2026