Sodium thiomethoxide

Also known as: Methanethiol, sodium salt, Sodium methanethiolate, Sodium methyl mercaptide, Sodium methyl sulfide, Methyl mercaptan sodium salt, Sodium thiomethylate, Sodium methylthiolate

Sodium thiomethoxide (CAS 5188-07-8) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula CH3NaS and a molecular weight of 70.089 g/mol. Key properties include a melting point of -123ºC and a flash point of 27°C. It is classified under GHS with signal word Danger and hazard statements H228, H301 — Toxic if swallowed and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5188-07-8
Jingsj CID: J-9673-1
Molecular Formula: CH₃NaS
Molecular Weight: 70.089 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	-123ºC
Flash Point	27°C
Exact Mass	69.985313
LogP	0.16310
Storage Conditions	Flammables area
Additional Property	soluble

GHS Safety & Compliance

Flammable / Corrosion / Acute ToxicitySignal word: Danger

H228
H301 — Toxic if swallowed
H314 — Causes severe skin burns and eye damage

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 Sodium thiomethoxide?

The CAS number of Sodium thiomethoxide is 5188-07-8.

What are the molecular formula and molecular weight of Sodium thiomethoxide?

Sodium thiomethoxide has molecular formula CH3NaS and molecular weight 70.089 g/mol.

Is Sodium thiomethoxide hazardous?

Sodium thiomethoxide has GHS signal word Danger and hazard statements H228; H301 — Toxic if swallowed; H314 — Causes severe skin burns and eye damage.

What are the upstream and downstream products of Sodium thiomethoxide?

For Sodium thiomethoxide, Upstream Products: Ethylamine, Methanethiol, 2-(methylthio)benzonitrile; Downstream Products: Dimethyl sulfide, 3-Chlorothioanisole, 2-(Methylthio)ethanol.

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. "Sodium thiomethoxide (CAS 5188-07-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-9673-1 (accessed 2026-11-09).

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