SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 62500
CASRN 62-50-0
SynonymsEthyl methanesulfonate
Methanesulfonic acid, ethyl ester
Analytical Method EPA Method 8270
Molecular FormulaC3H8O3S

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use BIOCHEMICAL RESEARCH EXPERIMENTALLY AS MUTAGEN
Apparent Color COLORLESS LIQUID
Boiling Point 213-213.5 DEG C @ 761 MM HG
Molecular Weight 124.15
Density SP GR: 1.1452 @ 22 DEG C/4 DEG C
Environmental Impact Release of ethyl methanesulfonate to the environment from anthrapogenic sources is expected to be minimal since this compound is available only as a research chemical. If released to water, ethyl methanesulfonate will hydrolyze (half-life 96 hours at 20 deg C). Direct photolysis, reaction with alkylperoxy radicals and singlet oxygen, bioaccumulation in aquatic organisms, and adsorption to suspended solids and sediments in water are not expected to be important fate processes. If released to moist soil, ethyl methanesulfonate is expected to hydrolyze as fast, if not faster, than in water. Mobility is expected to be extremely limited. If released to dry soil, this compound is expected to volatilize fairly rapidly. If released to the atmosphere, ethyl methanesulfonate is expected to exist almost entirely in the vapor phase. This compound may be removed from the atmosphere by reaction with photochemically generated hydroxyl radicals (estimated half-life 30 days) or by wet deposition. Human exposure to ethyl methanesulfonate is expected to be limited to workers involved with research on this chemical. Dermal contact and inhalation of contaminated air are potential routes of exposure.
Environmental Fate TERRESTRIAL FATE: If released to moist soil, ethyl methanesulfonate is expected to hydrolyze as fast, if not faster, than in water. The half-life for chemical hydrolysis in water at 20 deg C has been estimated to be 96 hours(1,SRC). Due to the reactivity of this compound, mobility is expected to be extremely limited. If released to dry soil, this compound is expected to volatilize fairly rapidly. AQUATIC FATE: If released to water, ethyl methanesulfonate will chemically hydrolyze (half-life 96 hours at 20 deg C(1,SRC)). Direct photolysis, reaction with alkylperoxy radicals and singlet oxygen, bioaccumulation in aquatic organisms, and adsorption to suspended solids and sediments in water are not expected to be important fate processes. ATMOSPHERIC FATE: Based on a vapor of 0.328 mm Hg at 25 deg C(1,SRC), ethyl methanesulfonate is expected to exist almost entirely in the vapor-phase in the atmosphere(2,SRC). This compound may be removed from the atmosphere by reaction with photochemically generated hydroxyl radicals (estimated half-life 30 days(3,SRC)) or by wet deposition.

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