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CAS Number: 79-41-4
SMILES : O=C(O)C(=C)C
CHEM : 2-Propenoic acid, 2-methyl-
MOL FOR: C4 H6 O2
MOL WT : 86.09
------------------------------ EPI SUMMARY (v4.10) --------------------------
Physical Property Inputs:
Log Kow (octanol-water): ------
Boiling Point (deg C) : ------
Melting Point (deg C) : ------
Vapor Pressure (mm Hg) : ------
Water Solubility (mg/L): ------
Henry LC (atm-m3/mole) : ------
Log Octanol-Water Partition Coef (SRC):
Log Kow (KOWWIN v1.68 estimate) = 0.99
Log Kow (Exper. database match) = 0.93
Exper. Ref: HANSCH,C ET AL. (1995)
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):
Boiling Pt (deg C): 159.35 (Adapted Stein & Brown method)
Melting Pt (deg C): -7.03 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 2.18 (Mean VP of Antoine & Grain methods)
VP (Pa, 25 deg C) : 291 (Mean VP of Antoine & Grain methods)
MP (exp database): 16 deg C
BP (exp database): 163 deg C
VP (exp database): 9.90E-01 mm Hg (1.32E+002 Pa) at 25 deg C
Water Solubility Estimate from Log Kow (WSKOW v1.42):
Water Solubility at 25 deg C (mg/L): 5.07e+004
log Kow used: 0.93 (expkow database)
no-melting pt equation used
Water Sol (Exper. database match) = 8.9e+004 mg/L (25 deg C)
Exper. Ref: ISHOW (NA--)
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 30483 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Neutral Organics-acid
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 4.53E-007 atm-m3/mole (4.59E-002 Pa-m3/mole)
Group Method: 7.39E-007 atm-m3/mole (7.48E-002 Pa-m3/mole)
Exper Database: 3.88E-07 atm-m3/mole (3.93E-002 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: 4.871E-006 atm-m3/mole (4.935E-001 Pa-m3/mole)
VP: 2.18 mm Hg (source: MPBPVP)
WS: 5.07E+004 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: 0.93 (exp database)
Log Kaw used: -4.800 (exp database)
Log Koa (KOAWIN v1.10 estimate): 5.730
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.7793
Biowin2 (Non-Linear Model) : 0.9190
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 3.3735 (days-weeks )
Biowin4 (Primary Survey Model) : 4.1091 (days )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.6500
Biowin6 (MITI Non-Linear Model): 0.7775
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.7962
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): 132 Pa (0.99 mm Hg)
Log Koa (Koawin est ): 5.730
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 2.27E-008
Octanol/air (Koa) model: 1.32E-007
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 8.21E-007
Mackay model : 1.82E-006
Octanol/air (Koa) model: 1.05E-005
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 18.6460 E-12 cm3/molecule-sec
Half-Life = 0.574 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 6.884 Hrs
Ozone Reaction:
OVERALL Ozone Rate Constant = 1.137500 E-17 cm3/molecule-sec
Half-Life = 1.007 Days (at 7E11 mol/cm3)
Half-Life = 24.179 Hrs
Fraction sorbed to airborne particulates (phi):
1.32E-006 (Junge-Pankow, Mackay avg)
1.05E-005 (Koa method)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (KOCWIN v2.00):
Koc : 2.252 L/kg (MCI method)
Log Koc: 0.353 (MCI method)
Koc : 4.679 L/kg (Kow method)
Log Koc: 0.670 (Kow method)
Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v2.00]:
Rate constants can NOT be estimated for this structure!
Bioaccumulation Estimates (BCFBAF v3.01):
Log BCF from regression-based method = 0.500 (BCF = 3.162 L/kg wet-wt)
Log Biotransformation Half-life (HL) = -0.6489 days (HL = 0.2244 days)
Log BCF Arnot-Gobas method (upper trophic) = 0.232 (BCF = 1.705)
Log BAF Arnot-Gobas method (upper trophic) = 0.232 (BAF = 1.705)
log Kow used: 0.93 (expkow database)
Volatilization from Water:
Henry LC: 3.88E-007 atm-m3/mole (Henry experimental database)
Half-Life from Model River: 1401 hours (58.38 days)
Half-Life from Model Lake : 1.536E+004 hours (640.1 days)
Removal In Wastewater Treatment:
Total removal: 1.90 percent
Total biodegradation: 0.09 percent
Total sludge adsorption: 1.79 percent
Total to Air: 0.02 percent
(using 10000 hr Bio P,A,S)
Level III Fugacity Model:
Mass Amount Half-Life Emissions
(percent) (hr) (kg/hr)
Air 1.48 8.77 1000
Water 40.9 208 1000
Soil 57.6 416 1000
Sediment 0.0742 1.87e+003 0
Persistence Time: 247 hr