Propargyl Alcohol

CAS RN:107-19-7

Exposure Summary

Propargyl alcohol's production and use as a corrosion inhibitor, solvent stabilizer, and laboratory reagent may result in its release to the environment through various waste streams. Its former use as a soil fumigant would have resulted in its direct release to the environment. If released to air, an extrapolated vapor pressure of 15.6 mm Hg at 25 deg C indicates propargyl alcohol will exist solely as a vapor in the atmosphere. Vapor-phase propargyl alcohol 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 37 hours. Propargyl alcohol can also be degraded in the atmosphere by reaction with ozone; however, the rate of this reaction is too slow to be environmentally relevant. Propargyl alcohol does not contain chromophores that absorb at wavelengths >290 nm and therefore is not expected to be susceptible to direct photolysis by sunlight. If released to soil, propargyl alcohol is expected to have very high mobility based upon an estimated Koc of 14. Volatilization from moist soil surfaces is expected to be an important fate process based upon an estimated Henry's Law constant of 1.1X10-6 atm-cu m/mole. Propargyl alcohol may volatilize from dry soil surfaces based upon its extrapolated vapor pressure. The biodegradation half-life of propargyl alcohol was 12.6 and 13 days in an alkaline sandy silt loam from Texas and an acidic sandy loam from Mississippi, respectively. If released into water, propargyl alcohol 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 16 and 176 days, respectively. An estimated BCF of 3 suggests the potential for bioconcentration in aquatic organisms is low. Hydrolysis is not expected to be an important environmental fate process since this compound lacks functional groups that hydrolyze under environmental conditions. Occupational exposure to propargyl alcohol may occur through inhalation and dermal contact with this compound at workplaces where propargyl alcohol is produced or used. (SRC)
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