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