Chloromethane Type: O
CAS No. 74873  
Physical Properties Value Reference
Molecular Weight (g/mol) 50.48782 TR
Solubility @ 20-25 degC (mg/L) 7250 TR
Vapor pressure @ 20-25 degC (mmHG) 3765 TR
Henry's Law constant @ 20 degC 1.438322 TR
Sorption coefficient (log L/kg) Koc 0.778 TR
Octanol-water partition coefficient (log L/kg) 1.0865 TR
Diffusion coefficient in air (cm^2/s) 0.126 TR
Diffusion coefficient in water (cm^2/s) 6.5e-006 TR
     
Miscellaneous Parameters Value Reference
Relative bioavailability factor (-) 1 T
Analytical Detection Limits:
Water (mg/L) 0.001 S
Soil (mg/kg) 0.01 S
First-order decay half lives (days):
Saturated zone 56  
Unsaturated zone 56 H
Soil-to-plant biotransfer factor (0):
Above ground veg. -  
Below ground veg. - -
     
Toxicity Data Value Reference
EPA weight of evidence D  
Carcinogen TRUE  
Oral slope factor (1/[mg/kg/day]) 0.013 TR
Inhalation unit risk factor (1/[ug/m^3]) 1.8e-006 TR
Oral reference dose (mg/kg/day) - -
Inhalation reference conc. (mg/m^3) 0.09 TR
     
Dermal Exposure Value Reference
Dermal adsorption fraction (-) 0 TR
Gastrointestinal adsorption fraction (-) 0.8 TR
Dermal permeability coefficient (cm/hr) 0.0042 D
Lag time for dermal exposure (hr) 0.18 D
Critical dermal exposure time (hr) 0.43  
Relative contribution of perm. coeff. (-) 0.00081  
     
Regulatory Standards Value Reference
Primary MCL - -
Secondary MCL - -
Drinking Water MCLs (mg/L):
Occupational Air PEL/TWA (mg/m^3) 207 OS
Surface water quality criteria (mg/L)
Aquatic life protection: Fresh water biota - -
Aquatic life protection: Marine biota - -
Human health: Drinking / freshwater fish - -
Human health: Fresh water fishing only - -
Human health: Salt water fishing only - -
     
LAST UPDATE: Sunday, 29 November -0001