Names | |
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Preferred IUPAC name
Methyl trifluoromethanesulfonate | |
Other names
Trifluoromethanesulfonic acid, methyl ester
Triflic acid, methyl ester, methyl triflate | |
Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.005.793 |
EC Number |
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PubChem CID
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UNII | |
UN number | 2924 |
CompTox Dashboard (EPA)
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Properties | |
C2H3F3O3S | |
Molar mass | 164.10 g·mol−1 |
Appearance | Colourless Liquid |
Density | 1.496 g/mL |
Melting point | −64 °C (−83 °F; 209 K) |
Boiling point | 100 °C (212 °F; 373 K) |
Hydrolyzes | |
Hazards[1] | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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Corrosive |
GHS labelling: | |
Danger | |
H226, H301, H311, H314, H330 | |
P210, P233, P303+P361+P353, P304+P340+P310, P305+P351+P338, P380 | |
Flash point | 38 °C (100 °F; 311 K) |
Related compounds | |
Related compounds
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Methyl fluorosulfonate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Methyl trifluoromethanesulfonate, also commonly called methyl triflate and abbreviated MeOTf, is the organic compound with the formula CF3SO2OCH3. It is a colourless liquid which finds use in organic chemistry as a powerful methylating agent.[2] The compound is closely related to methyl fluorosulfonate (FSO2OCH3). Although there has yet to be a reported human fatality, several cases were reported for methyl fluorosulfonate (LC50 (rat, 1 h) = 5 ppm), and methyl triflate is expected to have similar toxicity based on available evidence.[3][verification needed]