Dexamethasone 9,11-epoxide

Also known as: 16α-Methyl Epoxide, 8-DM, Dexamethasone EP Impurity D, Desoximetasone Impurity D, Mometasone Furoate EP Impurity L, (9β,11β,16α)-17,21-dihydroxy-16-methyl-9,11-epoxypregna-1,4-diene-3,20-dione, (4aS,4bS,5aS,6aS,7R,8R,9aS,9bS)-7-glycoloyl-7-hydroxy-4a,6a,8-trimethyl-5a,6,6a,7,8,9,9a,9b,10,11-decahydrocyclopenta[7,8]phenanthro[4b,5-b]oxiren-2(4aH)-one

Dexamethasone 9,11-epoxide (CAS 24916-90-3) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C22H28O5 and a molecular weight of 372.455 g/mol. Key properties include a melting point of 210-220ºC, a boiling point of 564.9±50.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 198.1±23.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 24916-90-3
Jingsj CID: J-1962808-4
Molecular Formula: C₂₂H₂₈O₅
Molecular Weight: 372.455 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	210-220ºC
Boiling Point	564.9±50.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	198.1±23.6 °C
Exact Mass	372.193665
PSA	87.13000
LogP	2.23
Vapor Pressure	0.0±3.5 mmHg at 25°C
Refractive Index	1.616
Storage Conditions	Refrigerator

Activity & Biological Data

Additional Information	[1]. CN 106520896 A [2]. RU 2532902 C1

Customs & Trade Information

HS Code	2937290090

Frequently Asked Questions

What is the CAS number of Dexamethasone 9,11-epoxide?

The CAS number of Dexamethasone 9,11-epoxide is 24916-90-3.

What are the molecular formula and molecular weight of Dexamethasone 9,11-epoxide?

Dexamethasone 9,11-epoxide has molecular formula C22H28O5 and molecular weight 372.455 g/mol.

What are the upstream and downstream products of Dexamethasone 9,11-epoxide?

For Dexamethasone 9,11-epoxide, Downstream Products: Mometasone furoate, Mometasone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Dexamethasone 9,11-epoxide (CAS 24916-90-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1962808-4 (accessed 2026-11-07).

Data for reference only; verify product details with suppliers before purchase.