Methyl isothiocyanate
Also known as: MITC, Isothiocyanatomethane, methylimino(sulfanylidene)methane, (methylimino)(thioxo)methane, Methane, (methylimino)thioxo-, EINECS 209-132-5, MFCD00004818, Methyl mustard oil
Methyl isothiocyanate (CAS 556-61-6) 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 73.117 g/mol. Key properties include a melting point of 30-34 °C(lit.), a boiling point of 107.8±3.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 32.2±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H331 — Toxic if inhaled and H310. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 556-61-6
- Jingsj CID
- J-49459-7
- Molecular Formula
- C2H3NS
- Molecular Weight
- 73.117 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 30-34 °C(lit.) |
|---|---|
| Boiling Point | 107.8±3.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 32.2±0.0 °C |
| Exact Mass | 72.998619 |
| PSA | 44.45000 |
| LogP | 0.94 |
| Vapor Pressure | 31.2±0.2 mmHg at 25°C |
| Refractive Index | 1.488 |
| Additional Property | 7.6 g/L |
GHS Safety & Compliance
- H301 — Toxic if swallowed
- H331 — Toxic if inhaled
- H310
- H314 — Causes severe skin burns and eye damage
- H317 — May cause an allergic skin reaction
- H410 — Very toxic to aquatic life with long lasting effects
Frequently Asked Questions
What is the CAS number of Methyl isothiocyanate?
The CAS number of Methyl isothiocyanate is 556-61-6.
What are the molecular formula and molecular weight of Methyl isothiocyanate?
Methyl isothiocyanate has molecular formula C2H3NS and molecular weight 73.117 g/mol.
Is Methyl isothiocyanate hazardous?
Methyl isothiocyanate has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H331 — Toxic if inhaled; H310.
What are the upstream and downstream products of Methyl isothiocyanate?
For Methyl isothiocyanate, Upstream Products: Carbon disulphide, Methylamine hydrochloride, Thiophosgene; Downstream Products: MTH-DL-leucine, 5-Amino-1-methyl-1H-tetrazole, 4-Methyl-5-phenyl-2,4-dihydro-3H-1,2,4-triazole-3-thione.
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 isothiocyanate (CAS 556-61-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49459-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.