Vinyl Methyl Ether

CAS RN:107-25-5

Exposure Summary

Vinyl methyl ether's production and use in the manufacture of polyvinyl methyl ether, in copolymers for coatings and lacquers, 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 ambient atmosphere. Gas-phase vinyl methyl ether will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 11 hours. The gas phase reactions of vinyl methyl ether with photochemically produced ozone corresponds to a half-life of 6.5 days. Direct photolysis will not be an important removal process since aliphatic ethers do not absorb light at wavelengths >290 nm. If released to soil, vinyl methyl ether is expected to have very high mobility based upon an estimated Koc of 22. Volatilization from moist soil surfaces is expected to be an important fate process based upon an estimated Henry's Law constant of 6.7X10-3 atm-cu m/mole. Volatilization from dry soil surfaces may be important given the vapor pressure of this compound. If released into water, vinyl methyl ether is not expected to adsorb to suspended solids and sediment in water based on the estimated Koc. Volatilization from water surfaces is expected to be an important fate process based on its estimated Henry's Law constant. The volatilization half-life from a model river and a model lake is estimated as approximately 2 hours and 3 days, respectively. An estimated BCF of 3 suggests the potential for bioconcentration in aquatic organisms is low. No data concerning the hydrolysis of vinyl methyl ether were located in the scientific literature. However, vinyl methyl ether may be susceptible to appreciable hydrolysis in certain environmental waters based upon experimental hydrolysis data for the structurally related butyl vinyl ether. The most probable route of general population exposure to vinyl methyl ether is via inhalation of contaminated air. Exposure through inhalation and dermal contact may occur in occupational settings. (SRC)
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