1-(Methylthio)-2-butanone

1-甲硫基-2-丁酮

Also known as: 1-(methylthio)butan-2-one, 1-methylsulfanylbutan-2-one, methylthiomethyl ethyl ketone, 2-Butanone, 1-(methylthio)-, FEMA 3207, UNII-KPY19W300G, Methylthio Butanone, Methylthiobutyl ketone, 1-(Methylthio)-2-butanone USP/EP/BP, 1-(Methylthio)butan-2-one

1-(Methylthio)-2-butanone (CAS 13678-58-5) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C5H10OS and a molecular weight of 118.19700 g/mol. It is also known as 1-(methylthio)butan-2-one, 1-methylsulfanylbutan-2-one and methylthiomethyl ethyl ketone. Key properties include a boiling point of 52-53ºC (8 mm Hg), a density of 0.967 g/cm3 and a flash point of 50.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 13678-58-5
Jingsj CID: J-1175-4
Molecular Formula: C₅H₁₀OS
Chinese Name: 1-甲硫基-2-丁酮
Molecular Weight: 118.19700 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	52-53ºC (8 mm Hg)
Density	0.967 g/cm3
Flash Point	50.5ºC

Frequently Asked Questions

What is the CAS number of 1-(Methylthio)-2-butanone?

The CAS number of 1-(Methylthio)-2-butanone is 13678-58-5.

What are the molecular formula and molecular weight of 1-(Methylthio)-2-butanone?

1-(Methylthio)-2-butanone has molecular formula C5H10OS and molecular weight 118.19700 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. "1-(Methylthio)-2-butanone (CAS 13678-58-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1175-4 (accessed 2026-10-23).

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