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Sodium 4-(methylthio)-2-oxobutanoate

Also known as: α-Keto-γ-(methylthio)butyric acid sodium salt, 4-Methylthio-2-oxobutanoic acid sodium salt, 4-Methylthio-2-oxobutyric acid sodium salt, KMBA, MTOB sodium, Sodium α-keto-(γ-methylthio)butyrate, Sodium 4-methylsulfanyl-2-oxobutanoate, UNII-2EZY36W75U

Sodium 4-(methylthio)-2-oxobutanoate (CAS 51828-97-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H7NaO3S and a molecular weight of 170.16200 g/mol. Key property: a melting point of >300ºC(lit.). It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.
51828-97-8
Jingsj CID
J-491-1
Molecular Formula
C5H7NaO3S
Molecular Weight
170.16200 g/mol
Category
Organic Acids
Last updated
11/3/2026
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Physicochemical Properties

Melting Point>300ºC(lit.)
Exact Mass170.00100
PSA82.50000

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Activity & Biological Data

TargetCtBP[1]
Additional Information[1]. Li H, et al. C-terminal binding proteins 1 and 2 in traumatic brain injury-induced inflammation and their inhibition as an approach for anti-inflammatory treatment. Int J Biol Sci. 2020 Feb 4;16(7):1107-1120. [2]. Di LJ, et al. Genome-wide profiles of CtBP link metabolism with genome stability and epithelial reprogramming in breast cancer. Nat Commun. 2013;4:1449.

Customs & Trade Information

HS Code2930909090
Summary2930909090. 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 Sodium 4-(methylthio)-2-oxobutanoate?

The CAS number of Sodium 4-(methylthio)-2-oxobutanoate is 51828-97-8.

What are the molecular formula and molecular weight of Sodium 4-(methylthio)-2-oxobutanoate?

Sodium 4-(methylthio)-2-oxobutanoate has molecular formula C5H7NaO3S and molecular weight 170.16200 g/mol.

Is Sodium 4-(methylthio)-2-oxobutanoate hazardous?

Sodium 4-(methylthio)-2-oxobutanoate has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of Sodium 4-(methylthio)-2-oxobutanoate?

For Sodium 4-(methylthio)-2-oxobutanoate, Downstream Products: L-Methionine, DL-Methionine, 2-Hydroxy-4-(methylthio)butyric acid.

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

Last updated:

How to cite: Jingsj. "Sodium 4-(methylthio)-2-oxobutanoate (CAS 51828-97-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-491-1 (accessed 2026-11-09).

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