(S)-(-)-3-(Acetylthio)-2-methylpropionic acid

Also known as: (2S)-3-(Acetylsulfanyl)-2-methylpropanoic acid, D-(-)-3-Acetylthio-2-methylpropionic acid, D-(-)-S-Acetyl-beta-mercaptoisobutyric acid, (S)-β-(Acetylmercapto)isobutyric acid, (S)-3-Acetylthio-2-methylpropionic acid, MFCD00038563, EINECS 278-480-8, Propanoic acid, 3-(acetylthio)-2-methyl-, (2S)-

(S)-(-)-3-(Acetylthio)-2-methylpropionic acid (CAS 76497-39-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H10O3S and a molecular weight of 162.207 g/mol. Key properties include a melting point of 5 °C, a boiling point of 276.5±23.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 121.0±22.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 76497-39-7
Jingsj CID: J-8831-3
Molecular Formula: C₆H₁₀O₃S
Molecular Weight: 162.207 g/mol
Category: Organic Acids
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	5 °C
Boiling Point	276.5±23.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	121.0±22.6 °C
Exact Mass	162.035065
PSA	79.67000
LogP	0.88
Vapor Pressure	0.0±1.2 mmHg at 25°C
Refractive Index	1.501
Additional Property	INSOLUBLE

Customs & Trade Information

HS Code	2930909090
Summary	2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of (S)-(-)-3-(Acetylthio)-2-methylpropionic acid?

The CAS number of (S)-(-)-3-(Acetylthio)-2-methylpropionic acid is 76497-39-7.

What are the molecular formula and molecular weight of (S)-(-)-3-(Acetylthio)-2-methylpropionic acid?

(S)-(-)-3-(Acetylthio)-2-methylpropionic acid has molecular formula C6H10O3S and molecular weight 162.207 g/mol.

What are the upstream and downstream products of (S)-(-)-3-(Acetylthio)-2-methylpropionic acid?

For (S)-(-)-3-(Acetylthio)-2-methylpropionic acid, Upstream Products: 3-Mercaptoisobutyric acid; Downstream Products: (R)-3-(ACETYLTHIO)-2-METHYLPROPIONYL CHLORIDE.

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. "(S)-(-)-3-(Acetylthio)-2-methylpropionic acid (CAS 76497-39-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8831-3 (accessed 2026-11-09).

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