2-Chloroethyl methyl sulfide

Also known as: 2-Methylthioethyl chloride, 1-Chloro-2-(methylsulfanyl)ethane, 1-Chloro-2-(methylthio)ethane, 1-chloro-2-methylsulfanyl-ethane, Hemisulfur mustard, β-Chloroethyl methyl sulfide, Methyl 2-chloroethyl sulfide, Ethane, 1-chloro-2-(methylthio)-

2-Chloroethyl methyl sulfide (CAS 542-81-4) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C3H7ClS and a molecular weight of 110.606 g/mol. Key properties include a boiling point of 140.0±0.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 42.2±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H302 — Harmful if swallowed and H311 — Toxic in contact with skin. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 542-81-4
Jingsj CID: J-34677-7
Molecular Formula: C₃H₇ClS
Molecular Weight: 110.606 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	140.0±0.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	42.2±0.0 °C
Exact Mass	109.995697
PSA	25.30000
LogP	1.43
Vapor Pressure	7.8±0.2 mmHg at 25°C
Refractive Index	1.469

GHS Safety & Compliance

Flammable / Corrosion / Acute Toxicity / Health HazardSignal word: Danger

H226 — Flammable liquid and vapour
H302 — Harmful if swallowed
H311 — Toxic in contact with skin
H331 — Toxic if inhaled
H314 — Causes severe skin burns and eye damage
H350 — May cause cancer

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 2-Chloroethyl methyl sulfide?

The CAS number of 2-Chloroethyl methyl sulfide is 542-81-4.

What are the molecular formula and molecular weight of 2-Chloroethyl methyl sulfide?

2-Chloroethyl methyl sulfide has molecular formula C3H7ClS and molecular weight 110.606 g/mol.

Is 2-Chloroethyl methyl sulfide hazardous?

2-Chloroethyl methyl sulfide has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H302 — Harmful if swallowed; H311 — Toxic in contact with skin.

What are the upstream and downstream products of 2-Chloroethyl methyl sulfide?

For 2-Chloroethyl methyl sulfide, Upstream Products: 2-(Methylthio)ethanol, Methanethiol, Vinyl chloride; Downstream Products: 2-(Methylthio)ethanol, 1-chloro-2-(methylsulfonyl)ethane, Demephion-S.

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. "2-Chloroethyl methyl sulfide (CAS 542-81-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-34677-7 (accessed 2026-11-06).

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