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Methyl thiocyanate

Also known as: Methyl rhodanide, Methyl sulfocyanate, Methylthiokyanat, Thiocyanomethane, methylrhodanate, methylsulfocyanate, Methane, thiocyanato-, Methylethiocyanate, Methylrhodanid, thiocyanatomethane, thiocyanic acid methyl ester

Methyl thiocyanate (CAS 556-64-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C2H3NS and a molecular weight of 73.11690 g/mol. Key properties include a melting point of -5 °C, a boiling point of 131 °C, a density of 1.08 and a flash point of 38 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H301 — Toxic 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.
556-64-9
Jingsj CID
J-44084-6
Molecular Formula
C2H3NS
Molecular Weight
73.11690 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point-5 °C
Boiling Point131 °C
Density1.08
Flash Point38 °C
Exact Mass72.99860
PSA49.09000
LogP0.83048
Refractive Index1.467-1.469

GHS Safety & Compliance

Flammable / Acute ToxicitySignal word: Danger
  • H226 — Flammable liquid and vapour
  • H301 — Toxic if swallowed
  • H311 — Toxic in contact with skin
  • H331 — Toxic if inhaled
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of Methyl thiocyanate?

The CAS number of Methyl thiocyanate is 556-64-9.

What are the molecular formula and molecular weight of Methyl thiocyanate?

Methyl thiocyanate has molecular formula C2H3NS and molecular weight 73.11690 g/mol.

Is Methyl thiocyanate hazardous?

Methyl thiocyanate has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H301 — Toxic if swallowed; H311 — Toxic in contact with skin.

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

Last updated:

How to cite: Jingsj. "Methyl thiocyanate (CAS 556-64-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44084-6 (accessed 2026-11-09).

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