Trichloroethylene Type: O
CAS No. 79016  
Physical Properties Value Reference
Molecular Weight (g/mol) 131.38894 TR
Solubility @ 20-25 degC (mg/L) 1100 TR
Vapor pressure @ 20-25 degC (mmHG) 72 TR
Henry's Law constant @ 20 degC 0.428171 TR
Sorption coefficient (log L/kg) Koc 1.97 TR
Octanol-water partition coefficient (log L/kg) 2.4731 TR
Diffusion coefficient in air (cm^2/s) 0.079 TR
Diffusion coefficient in water (cm^2/s) 9.1e-006 TR
Miscellaneous Parameters Value Reference
Relative bioavailability factor (-) 1 T
Analytical Detection Limits:
Water (mg/L) 0.001 S
Soil (mg/kg) 0.005 S
First-order decay half lives (days):
Saturated zone 1653  
Unsaturated zone 1653 H
Soil-to-plant biotransfer factor (0):
Above ground veg. -  
Below ground veg. - -
Toxicity Data Value Reference
EPA weight of evidence B2  
Carcinogen TRUE  
Oral slope factor (1/[mg/kg/day]) 0.011 TR
Inhalation unit risk factor (1/[ug/m^3]) 1.7e-006 TR
Oral reference dose (mg/kg/day) 0.006 TR
Inhalation reference conc. (mg/m^3) - -
Dermal Exposure Value Reference
Dermal adsorption fraction (-) 0 TR
Gastrointestinal adsorption fraction (-) 1 TR
Dermal permeability coefficient (cm/hr) 0.016 D
Lag time for dermal exposure (hr) 0.55 D
Critical dermal exposure time (hr) 1.3  
Relative contribution of perm. coeff. (-) 0.026  
Regulatory Standards Value Reference
Primary MCL 0.005 MC
Secondary MCL - -
Drinking Water MCLs (mg/L):
Occupational Air PEL/TWA (mg/m^3) 537 OS
Surface water quality criteria (mg/L)
Aquatic life protection: Fresh water biota - -
Aquatic life protection: Marine biota - -
Human health: Drinking / freshwater fish 0.005 T3
Human health: Fresh water fishing only 0.612 T3
Human health: Salt water fishing only 0.408 T3
LAST UPDATE: Sunday, 29 November -0001