Methanesulfonyl fluoride
- CAS NO.：558-25-8
- Empirical Formula: CH3FO2S
- Molecular Weight: 98.1
- MDL number: MFCD00007423
- EINECS: 209-192-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-09-12 18:51:26
What is Methanesulfonyl fluoride?
Chemical properties
clear colorless to yellow liquid
General Description
Liquid.
Air & Water Reactions
On contact with moisture METHANESULFONYL FLUORIDE produces highly corrosive and toxic fumes of hydrogen fluoride gas.
Reactivity Profile
METHANESULFONYL FLUORIDE is corrosive, toxic liquid. Vigorous reaction with water, steam, alkali. A dangerous storage hazard. On contact with moisture METHANESULFONYL FLUORIDE produces highly corrosive and toxic fumes of hydrogen fluoride gas. When heated to decomposition METHANESULFONYL FLUORIDE emits toxic fumes of fluoride, and oxides of sulfur [M. K.]. May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291].
Health Hazard
Highly toxic when inhaled.
Fire Hazard
When heated to decomposition, METHANESULFONYL FLUORIDE emits very toxic fumes of fluorides and sulfur oxides.
Properties of Methanesulfonyl fluoride
| Boiling point: | 123-124 °C(lit.) |
| Density | 1.427 g/mL at 25 °C(lit.) |
| refractive index | 1.360 |
| Sensitive | Hygroscopic |
| CAS DataBase Reference | 558-25-8(CAS DataBase Reference) |
| EPA Substance Registry System | Methanesulfonyl fluoride (558-25-8) |
Safety information for Methanesulfonyl fluoride
| Pictogram(s) |
 Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06 |
| GHS Hazard Statements |
H300:Acute toxicity,oral H314:Skin corrosion/irritation H318:Serious eye damage/eye irritation H330:Acute toxicity,inhalation |
| Precautionary Statement Codes |
P320:Specific treatment is urgent (see … on this label). P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. |
Computed Descriptors for Methanesulfonyl fluoride
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