Names | |
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Preferred IUPAC name
Ethyl methanesulfonate | |
Other names
Ethyl mesylate
Ethyl methanesulphonate | |
Identifiers | |
3D model (JSmol)
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Abbreviations | EMS |
ChEBI | |
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.000.488 |
EC Number |
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KEGG | |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
CH3SO3C2H5 | |
Molar mass | 124.16 g/mol |
Appearance | Clear colorless liquid |
Density | 1.1452 g/cm3 (22 °C) |
Melting point | < 25 °C |
Boiling point | 85–86 °C (185–187 °F; 358–359 K) /10 mmHg(lit) |
Vapor pressure | 0.044 kPa @ 25˚C[2] |
Hazards | |
GHS labelling:[3] | |
Danger | |
H302, H340, H351 | |
P203, P264, P270, P280, P301+P317, P318, P330, P405, P501 | |
NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Ethyl methanesulfonate (EMS) is an organosulfur compound with the formula CH3SO3C2H5. It is the ethyl ester of methanesulfonic acid. A colorless liquid, it is classified as an alkylating agent. EMS is the most commonly used chemical mutagen in experimental genetics.[4][5] Mutations induced by EMS exposure can then be studied in genetic screens or other assays.