Methyl methanethiosulfonate
Also known as: S-Methyl methanethiolsulfonate, S-Methyl methanesulfonothioate, Methanesulfonothioic acid, S-methyl ester, Methanethiosulfonic acid, S-methyl ester, dimethyl thiosulfonate, methyl methanethiosulphonate, NSC 21545, MFCD00007565
Methyl methanethiosulfonate (CAS 2949-92-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C2H6O2S2 and a molecular weight of 126.198 g/mol. Key properties include a boiling point of 266.9±9.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 87.8±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2949-92-0
- Jingsj CID
- J-30721-1
- Molecular Formula
- C2H6O2S2
- Molecular Weight
- 126.198 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 266.9±9.0 °C at 760 mmHg |
|---|---|
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 87.8±0.0 °C |
| Exact Mass | 125.980919 |
| PSA | 67.82000 |
| LogP | 0.26 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.494 |
GHS Safety & Compliance
- H319 — Causes serious eye irritation
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 Methyl methanethiosulfonate?
The CAS number of Methyl methanethiosulfonate is 2949-92-0.
What are the molecular formula and molecular weight of Methyl methanethiosulfonate?
Methyl methanethiosulfonate has molecular formula C2H6O2S2 and molecular weight 126.198 g/mol.
Is Methyl methanethiosulfonate hazardous?
Methyl methanethiosulfonate has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.
What are the upstream and downstream products of Methyl methanethiosulfonate?
For Methyl methanethiosulfonate, Upstream Products: Dimethyl disulfide, Benzoyl peroxide; Downstream Products: 2-Chloro-4-(methylthio)pyrimidine, Formic Acid, Methanesulfonic 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. "Methyl methanethiosulfonate (CAS 2949-92-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30721-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.