4-Mercapto-2-butanone

4-巯基-2-丁酮

Also known as: 1-mercapto-3-oxobutane, 1-mercaptobutan-3-one, 2-Butanone, 4-mercapto-, 2-Keto-4-butanethiol, 4-Mercapto-butan-2-on, 4-mercapto-butan-2-one, 4-sulfanylbutan-2-one, FEMA No. 3357, UNII-RZB3QJ7Y8Q, thiomethyl acetone

4-Mercapto-2-butanone (CAS 34619-12-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C4H8OS and a molecular weight of 104.17100 g/mol. It is also known as 1-mercapto-3-oxobutane, 1-mercaptobutan-3-one and 2-Butanone, 4-mercapto-. Key properties include a melting point of 59-60ºC (15 MM HG), a boiling point of 167ºC at 760 mmHg, a density of 0.985 g/cm3 and a flash point of 54.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 34619-12-0
Jingsj CID: J-918459-6
Molecular Formula: C₄H₈OS
Chinese Name: 4-巯基-2-丁酮
Molecular Weight: 104.17100 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	59-60ºC (15 MM HG)
Boiling Point	167ºC at 760 mmHg
Density	0.985 g/cm3
Flash Point	54.8ºC

Frequently Asked Questions

What is the CAS number of 4-Mercapto-2-butanone?

The CAS number of 4-Mercapto-2-butanone is 34619-12-0.

What are the molecular formula and molecular weight of 4-Mercapto-2-butanone?

4-Mercapto-2-butanone has molecular formula C4H8OS and molecular weight 104.17100 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. "4-Mercapto-2-butanone (CAS 34619-12-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-918459-6 (accessed 2026-10-24).

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