Fluorosulfonic acid
ALDRICH/236535 - purified by triple-distillation
Synonym: Fluosulfuric acid
CAS Number: 7789-21-1
Empirical Formula (Hill Notation): HFO3S
Molecular Weight: 100.07
EC Number: 232-149-4
MDL Number: MFCD00066174
Linear Formula: FSO3H
Product Type: Chemical
| bp | 165.5 °C (lit.) |
| density | 1.726 g/mL at 25 °C (lit.) |
| InChI | 1S/FHO3S/c1-5(2,3)4/h(H,2 |
| InChI key | UQSQSQZYBQSBJZ-UHFFFAOYSA |
| mp | −87.3 °C (lit.) |
| purified by | triple-distillation |
| Quality Level | 100 ![]() |
| SMILES string | OS(F)(=O)=O |
| storage temp. | 2-8°C |
| vapor density | 3.5 (vs air) |
| vapor pressure | 2.5 mmHg ( 25 °C) |
| Application: |
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| Packaging: | 100 mL in PFA/FEP bottle |
| Packaging: | 25 mL in poly bottle |
| Packaging: | Packaged in PFA/FEP bottles |
| Symbol | ![]() GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H314 - H332 |
| Precautionary statements | P261 - P271 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | C |
| Risk Statements | 20-35 |
| Safety Statements | 26-45 |
| RIDADR | UN 1777 8 / PGI |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| bp | 165.5 °C (lit.) |
| mp | −87.3 °C (lit.) |
| Density | 1.726 g/mL at 25 °C (lit.) |
| Storage Temp. | 2-8°C |
| UNSPSC | 12352300 |



