SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 10595956
CASRN 10595-95-6
SynonymsN-Nitrosomethylethylamine
Ethanamine, N-methyl-N-nitroso
Molecular FormulaC3H8N2O

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

Use RESEARCH CHEMICAL
Consumption Patterns ESSENTIALLY 100% AS A RESEARCH CHEMICAL
Apparent Color YELLOW LIQUID
Boiling Point 163 DEG C @ 747 MM HG
Molecular Weight 88.13
Density 0.9448 @ 18 DEG C/4 DEG C
Environmental Impact N-Nitrosomethylethylamine is released to the environment in mainstream and sidestream tobacco smoke. It may be formed in the night-time atmosphere by reaction of atmospheric amines with nitrous acid. If released to the atmosphere, N-nitrosomethylethylamine will degrade rapidly through direct photolysis in sunlight (estimated half-life of 5.8 min at a solar zenith angle of 40 deg N). If released to soil or water, it will degrade rapidly at the water surface or on soil surfaces exposed to sunlight. Insufficient data are available to predict the relative importance of biodegradation within soil or water. N-Nitrosomethylethylamine is relatively soluble in water and is therefore expected to leach in soil. The general population is exposed to N-nitrosomethylethylamine through inhalation of tobacco smoke and through consumption of various foods, such as foods processed with curing, smoking or nitrite/nitrate processing.
Environmental Fate TERRESTRIAL FATE: Very little experimental data are available to predict the environmental fate of N-nitrosomethylethylamine in soil. Nitrosamines (such as N-nitrosomethylethylamine) photolyze rapidly in aqueous solution ; therefore, photolysis is expected to occur on surfaces exposed to sunlight. Insufficient data are available to predict the relative importance of biodegradation or other transformation processes in soil. Based upon estimated Koc values of 4 to 73(2-3,SRC), N-nitrosomethylethylamine will be highly mobile in soil and can be expected to leach. AQUATIC FATE: Nitrosamines (such as N-nitrosomethylethylamine) photolyze rapidly in aqueous solution ; at a solar zenith angle of 40 deg N, the photolysis half-life of N-nitrosomethylethylamine and similar nitrosamines at the water's surface (exposed to full sunlight) is about 5.8 min(1,SRC). Insufficient data are available to predict the relative importance of biodegradation in natural water. Volatilization from water is slow; the estimated volatilization half-life from a shallow, rapidly moving model river is 81 days(2,SRC). Since N-nitrosomethylethylamine is relatively soluble in water (30% ), adsorption to sediment and bioconcentration in aquatic organisms are not expected to be important fate processes. ATMOSPHERIC FATE: Based upon an extrapolated vapor pressure of 1.1 mm Hg at 20 deg C , N-nitrosomethylethylamine will exist primarily in the vapor-phase in the ambient atmosphere(2,SRC). It will degrade rapidly in the vapor-phase via direct photolysis in sunlight; the photolysis half-life at a solar zenith angle of 40 deg N is approximately 5.8 min(3,SRC). By comparison, reaction with photochemically produced hydroxyl radicals is a minor degradation process with an estimated half-life of 1.6 days(4,SRC).

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