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Lewisite
CAS RN:
541-25-3
Other PropertiesSolidifies at -13 deg C. Slowly decomposed by water. Hydrolyzed by alkalies; neutralized and inactivated by bleaching powder, sodium hypochlorite. Henry's Law constant = 3.2X10-4 atm-cu m/mol at 25 deg C (est) Two isomers, probably cis and trans, are known. Vapor pressure= 0.4 mm Hg at 25 deg C /trans-isomer/ Vapor pressure= 1.562 mm Hg at 25 deg C /cis-isomer/ Freezing point = -44.7 deg C /cis-isomer/ Freezing point = -1.2 deg C /trans-isomer/ Boiling point (at 760 mm Hg) = 169.8 deg C /cis-isomer/ Boiling point (at 760 mm Hg) = 196.6 deg C /trans-isomer/ Is absorbed by rubber, varnish, and porous materials Heat of vaporization: 15,150 cal/g-mole at 25 deg C /trans-isomer/ Heat of vaporization: 11,220 cal/g-mole @ 25 deg C /cis-isomer/ Refractive index at 25 deg C = 1.6076 /trans-isomer/ Refractive index at 25 deg C = 1.5859 /cis-isomer/ Viscosity at 25 deg C: 0.2005 g/cm/sec /trans-isomer/ Viscosity at 25 deg C: 0.0169 g/cm/sec /cis-isomer/ Volatility = 4,480 mg/cu m Hydroxyl radical reaction rate constant = 1.18X10-11 cu cm/molec-sec at 25 deg C (est) /cis-isomer/ Hydroxyl radical reaction rate constant = 1.34X10-11 cu cm/molec-sec at 25 deg C (est) /trans-isomer/ |