Methyl fluorosulfonate
Also known as: Methyl fluorosulfate, Fluorosulfuric acid methyl ester, Fluorosulfonic acid methyl ester, Magic Methyl, Methyl sulphurofluoridoate, Methoxysulphonyl fluoride, fluorosulfonyloxymethane
Methyl fluorosulfonate (CAS 421-20-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula CH3FO3S and a molecular weight of 114.09600 g/mol. Key properties include a melting point of -95 °C, a boiling point of 93 °C, a density of 1.45 and a flash point of 10ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 421-20-5
- Jingsj CID
- J-13720-2
- Molecular Formula
- CH3FO3S
- Molecular Weight
- 114.09600 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -95 °C |
|---|---|
| Boiling Point | 93 °C |
| Density | 1.45 |
| Flash Point | 10ºC |
| Exact Mass | 113.97900 |
| PSA | 51.75000 |
| LogP | 0.92790 |
| Vapor Pressure | 57.3mmHg at 25°C |
| Refractive Index | 1.363 |
Customs & Trade Information
| HS Code | 2915900090 |
|---|---|
| Summary | 2915900090 other saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:5.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Methyl fluorosulfonate?
The CAS number of Methyl fluorosulfonate is 421-20-5.
What are the molecular formula and molecular weight of Methyl fluorosulfonate?
Methyl fluorosulfonate has molecular formula CH3FO3S and molecular weight 114.09600 g/mol.
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 fluorosulfonate (CAS 421-20-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-13720-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.