Cyanogen

CAS RN:460-19-5

Volatilization

The Henry's Law constant for cyanogen is estimated as 5.4X10-3 atm-cu m/mole(SRC) derived from its vapor pressure, 4,300 mm Hg(1), and water solubility, 1.51X10+5 mg/L(2). This Henry's Law constant indicates that cyanogen is expected to volatilize rapidly from water surfaces(3). 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)(3) 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)(3) is estimated as 3.4 days(SRC). Cyanogen's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). Cyanogen is expected to volatilize from dry soil surfaces(SRC) based upon its vapor pressure(1).
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