Hexachlorocyclohexane, alpha Type: O
CAS No. 319846  
Physical Properties Value Reference
Molecular Weight (g/mol) 290.83164 TR
Solubility @ 20-25 degC (mg/L) 2 TR
Vapor pressure @ 20-25 degC (mmHG) 4.26e-005 TR
Henry's Law constant @ 20 degC 0.0002822603 TR
Sorption coefficient (log L/kg) Koc 3.12 TR
Octanol-water partition coefficient (log L/kg) 4.2586 TR
Diffusion coefficient in air (cm^2/s) 0.0142 TR
Diffusion coefficient in water (cm^2/s) 7.34e-006 TR
     
Miscellaneous Parameters Value Reference
Relative bioavailability factor (-) 1 T
Analytical Detection Limits:
Water (mg/L) - -
Soil (mg/kg) - -
First-order decay half lives (days):
Saturated zone -  
Unsaturated zone - -
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]) 6.3 TR
Inhalation unit risk factor (1/[ug/m^3]) 0.0018 TR
Oral reference dose (mg/kg/day) 0.008 TR
Inhalation reference conc. (mg/m^3) - -
     
Dermal Exposure Value Reference
Dermal adsorption fraction (-) 0.04 TR
Gastrointestinal adsorption fraction (-) 0.97 TR
Dermal permeability coefficient (cm/hr) - -
Lag time for dermal exposure (hr) - -
Critical dermal exposure time (hr) -  
Relative contribution of perm. coeff. (-) -  
     
Regulatory Standards Value Reference
Primary MCL - -
Secondary MCL - -
Drinking Water MCLs (mg/L):
Occupational Air PEL/TWA (mg/m^3) - -
Surface water quality criteria (mg/L)
Aquatic life protection: Fresh water biota - -
Aquatic life protection: Marine biota - -
Human health: Drinking / freshwater fish 0.000163 T3
Human health: Fresh water fishing only 0.000413 T3
Human health: Salt water fishing only 0.000275 T3
     
LAST UPDATE: Sunday, 29 November -0001