Lewisite

CAS RN: 541-25-3

Other Properties

Solidifies 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/
Find more information on this substance at: PubChem, PubMed