Pregna-1,4-diene-3,20-dione

1,4-孕甾二烯-3,20-二酮

Also known as: 1,2-Dehydroprogesterone, 1-Dehydroprogesterone, Δ1-Progesterone, Delta1-progesterone, 1,4-Pregnadiene-3,20-dione, 1,4-Pregnadien-3,20-dione, NSC 63538, Progesterone EP Impurity J, Progesterone Impurity 11, Progesterone impurity J, 3,20-dioxo-pregna-1,4-diene, pregn-1,4-diene-3,20-dione

Pregna-1,4-diene-3,20-dione (CAS 1162-54-5) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C21H28O2 and a molecular weight of 312.44600 g/mol. It is also known as 1,2-Dehydroprogesterone, 1-Dehydroprogesterone and Δ1-Progesterone. Key properties include a boiling point of 449.2ºC at 760mmHg, a density of 1.1g/cm3 and a flash point of 167.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1162-54-5
Jingsj CID: J-33557-3
Molecular Formula: C₂₁H₂₈O₂
Chinese Name: 1,4-孕甾二烯-3,20-二酮
Molecular Weight: 312.44600 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	449.2ºC at 760mmHg
Density	1.1g/cm3
Flash Point	167.4ºC

Frequently Asked Questions

What is the CAS number of Pregna-1,4-diene-3,20-dione?

The CAS number of Pregna-1,4-diene-3,20-dione is 1162-54-5.

What are the molecular formula and molecular weight of Pregna-1,4-diene-3,20-dione?

Pregna-1,4-diene-3,20-dione has molecular formula C21H28O2 and molecular weight 312.44600 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Pregna-1,4-diene-3,20-dione (CAS 1162-54-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33557-3 (accessed 2026-10-23).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.