Vinyl methyl ether

CAS RN:107-25-5

Exposure Summary

Vinyl methyl ether's production and use in copolymers for coatings and lacquers, in polystyrene and ionomer resins, in plasticizers for nitrocellulose, and in adhesives may result in its release to the environment through various waste streams. If released to air, a vapor pressure of 1316 mm Hg at 25 deg C indicates vinyl methyl ether will exist solely as a gas in the atmosphere. Gas-phase vinyl methyl ether will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals and ozone; the half-lives for these reactions in air are estimated to be 11 hours and 1.3 days, respectively. Vinyl methyl ether does not absorb at wavelengths >290 nm and, therefore, is not expected to be susceptible to direct photolysis by sunlight. If released to soil, vinyl methyl ether is expected to have very high mobility based upon an estimated Koc of 5. Volatilization from moist soil surfaces is expected based upon an estimated Henry's Law constant of 3.9X10-3 atm-cu m/mole. Vinyl methyl ether is expected to volatilize from dry soil surfaces based upon its vapor pressure. Biodegradation data in soil or water were not available. If released into water, vinyl methyl ether is not expected to adsorb to suspended solids and sediment based upon the estimated Koc. Volatilization from water surfaces is expected to be an important fate process based upon this compound's estimated Henry's Law constant. Estimated volatilization half-lives for a model river and model lake are 2 hours and 3 days, respectively. An estimated BCF of 3 suggests the potential for bioconcentration in aquatic organisms is low. Hydrolysis is expected based on hydrolysis half-lives of 9.5 hours, 40 days and 10.9 years at pH 5, 6 and 9, respectively, for structurally similar butyl vinyl ether. Occupational exposure to vinyl methyl ether may occur through inhalation and dermal contact with this compound at workplaces where vinyl methyl ether is produced or used. (SRC)
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