3-Bromo-1-propyne

CAS RN: 106-96-7

Volatilization

The Henry's Law constant for 3-bromo-1-propyne is 1.13X10-3 atm-cu m/mole(1). This Henry's Law constant indicates that 3-bromo-1-propyne 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 5 days(SRC). 3-Bromo-1-propyne's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). 3-Bromo-1-propyne is expected to volatilize from dry soil surfaces(SRC) based upon an estimated vapor pressure of 108 mm Hg(SRC), calculated using a water solubility of 1.49X10+4 mg/L(2) and its Henry's Law constant(2).
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