Ethylene

CAS RN:74-85-1

Volatilization

The Henry's Law constant for ethylene is 0.228 atm-cu m/mole(1). This Henry's Law constant indicates that ethylene is expected to volatilize rapidly from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 2 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 2 days(SRC). Ethylene's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). Ethylene is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 5.21X10+4 mm Hg(3).
Find more information on this substance at: Hazardous Substances Data Bank , TOXNET , PubMed