This page contains the EPI System Summary only.
For complete control of this information -
Download the free EPI SuiteTM v4.0 program : here
also you can go back to the Datasheet
CAS Num: 000067-56-1
SMILES : OC
CHEM : Methanol
MOL FOR: C1 H4 O1
MOL WT : 32.04
------------------------------ EPI SUMMARY (v4.00) --------------------------
Physical Property Inputs:
Water Solubility (mg/L): ------
Vapor Pressure (mm Hg) : ------
Henry LC (atm-m3/mole) : ------
Log Kow (octanol-water): ------
Boiling Point (deg C) : ------
Melting Point (deg C) : ------
Log Octanol-Water Partition Coef (SRC):
Log Kow (KOWWIN v1.67 estimate) = -0.63
Log Kow (Exper. database match) = -0.77
Exper. Ref: HANSCH,C ET AL. (1995)
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.43):
Boiling Pt (deg C): 39.35 (Adapted Stein & Brown method)
Melting Pt (deg C): -101.00 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 119 (Mean VP of Antoine & Grain methods)
VP (Pa, 25 deg C) : 1.58E+004 (Mean VP of Antoine & Grain methods)
MP (exp database): -97.6 deg C
BP (exp database): 64.7 deg C
VP (exp database): 1.27E+02 mm Hg (1.69E+004 Pa) at 25 deg C
Water Solubility Estimate from Log Kow (WSKOW v1.41):
Water Solubility at 25 deg C (mg/L): 1e+006
log Kow used: -0.77 (expkow database)
no-melting pt equation used
Water Sol (Exper. database match) = 1e+006 mg/L (25 deg C)
Exper. Ref: RIDDICK,JA ET AL. (1986)
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 1e+006 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Neutral Organics
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 4.27E-006 atm-m3/mole (4.32E-001 Pa-m3/mole)
Group Method: 3.62E-006 atm-m3/mole (3.67E-001 Pa-m3/mole)
Exper Database: 4.55E-06 atm-m3/mole (4.61E-001 Pa-m3/mole)
For Henry LC Comparison Purposes:
User-Entered Henry LC: not entered
Henrys LC [via VP/WSol estimate using User-Entered or Estimated values]:
HLC: 5.017E-006 atm-m3/mole (5.083E-001 Pa-m3/mole)
VP: 119 mm Hg (source: MPBPVP)
WS: 1E+006 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: -0.77 (exp database)
Log Kaw used: -3.730 (exp database)
Log Koa (KOAWIN v1.10 estimate): 2.960
Log Koa (experimental database): 2.880
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.8910
Biowin2 (Non-Linear Model) : 0.9752
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 3.2883 (days-weeks )
Biowin4 (Primary Survey Model) : 3.9310 (days )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.7784
Biowin6 (MITI Non-Linear Model): 0.9324
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.8893
Ready Biodegradability Prediction: YES
Hydrocarbon Biodegradation (BioHCwin v1.01):
Structure incompatible with current estimation method!
Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
Vapor pressure (liquid/subcooled): 1.69E+004 Pa (127 mm Hg)
Log Koa (Exp database): 2.880
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 1.77E-010
Octanol/air (Koa) model: 1.86E-010
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 6.4E-009
Mackay model : 1.42E-008
Octanol/air (Koa) model: 1.49E-008
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 0.6160 E-12 cm3/molecule-sec
Half-Life = 17.364 Days (12-hr day; 1.5E6 OH/cm3)
Ozone Reaction:
No Ozone Reaction Estimation
Fraction sorbed to airborne particulates (phi):
1.03E-008 (Junge-Pankow, Mackay avg)
1.49E-008 (Koa method)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (KOCWIN v2.00):
Koc : 1 L/kg (MCI method)
Log Koc: 0.000 (MCI method)
Koc : 1.224 L/kg (Kow method)
Log Koc: 0.088 (Kow method)
Experimental Log Koc: 0.44 (database)
Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v2.00]:
Rate constants can NOT be estimated for this structure!
Bioaccumulation Estimates (BCFBAF v3.00):
Log BCF from regression-based method = 0.500 (BCF = 3.162 L/kg wet-wt)
Log Biotransformation Half-life (HL) = -1.6723 days (HL = 0.02126 days)
Log BCF Arnot-Gobas method (upper trophic) = -0.045 (BCF = 0.9013)
Log BAF Arnot-Gobas method (upper trophic) = -0.045 (BAF = 0.9013)
log Kow used: -0.77 (expkow database)
Volatilization from Water:
Henry LC: 4.55E-006 atm-m3/mole (Henry experimental database)
Half-Life from Model River: 73.41 hours (3.059 days)
Half-Life from Model Lake : 848.3 hours (35.35 days)
Removal In Wastewater Treatment:
Total removal: 2.10 percent
Total biodegradation: 0.09 percent
Total sludge adsorption: 1.75 percent
Total to Air: 0.26 percent
(using 10000 hr Bio P,A,S)
Level III Fugacity Model:
Mass Amount Half-Life Emissions
(percent) (hr) (kg/hr)
Air 10.3 272 1000
Water 39.3 208 1000
Soil 50.4 416 1000
Sediment 0.0695 1.87e+003 0
Persistence Time: 261 hr