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CAS Number: 547-65-9

SMILES : C1CC(=C)C(=O)O1

CHEM : alpha-Methylene butyrolactone

MOL FOR: C5 H6 O2

MOL WT : 98.10

------------------------------ EPI SUMMARY (v4.11) --------------------------

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) = 0.10

Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):

Boiling Pt (deg C): 192.40 (Adapted Stein & Brown method)

Melting Pt (deg C): -25.09 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 0.526 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 70.2 (Mean VP of Antoine & Grain methods)

MP (exp database): < 25 deg C

BP (exp database): 58.5 @ 2 mm Hg deg C

Water Solubility Estimate from Log Kow (WSKOW v1.42):

Water Solubility at 25 deg C (mg/L): 9.634e+004

log Kow used: 0.10 (estimated)

no-melting pt equation used

Water Sol (Exper. database match) = 1.5e+005 mg/L ( deg C)

Exper. Ref: MERCK INDEX (1996)

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 20488 mg/L

ECOSAR Class Program (ECOSAR v1.11):

Class(es) found:

Acrylates

Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:

Bond Method : 6.39E-005 atm-m3/mole (6.47E+000 Pa-m3/mole)

Group Method: 3.88E-005 atm-m3/mole (3.93E+000 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: 7.047E-007 atm-m3/mole (7.141E-002 Pa-m3/mole)

VP: 0.526 mm Hg (source: MPBPVP)

WS: 9.63E+004 mg/L (source: WSKOWWIN)

Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:

Log Kow used: 0.10 (KowWin est)

Log Kaw used: -2.583 (HenryWin est)

Log Koa (KOAWIN v1.10 estimate): 2.683

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.8750

Biowin2 (Non-Linear Model) : 0.9966

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 3.1226 (weeks )

Biowin4 (Primary Survey Model) : 3.9352 (days )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.8159

Biowin6 (MITI Non-Linear Model): 0.9352

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.6209

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): 64 Pa (0.48 mm Hg)

Log Koa (Koawin est ): 2.683

Kp (particle/gas partition coef. (m3/ug)):

Mackay model : 4.69E-008

Octanol/air (Koa) model: 1.18E-010

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 1.69E-006

Mackay model : 3.75E-006

Octanol/air (Koa) model: 9.46E-009

Atmospheric Oxidation (25 deg C) [AopWin v1.92]:

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 19.9016 E-12 cm3/molecule-sec

Half-Life = 0.537 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 6.449 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):

2.72E-006 (Junge-Pankow, Mackay avg)

9.46E-009 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 10.6 L/kg (MCI method)

Log Koc: 1.025 (MCI method)

Koc : 8.219 L/kg (Kow method)

Log Koc: 0.915 (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) = -2.1267 days (HL = 0.00747 days)

Log BCF Arnot-Gobas method (upper trophic) = -0.034 (BCF = 0.924)

Log BAF Arnot-Gobas method (upper trophic) = -0.034 (BAF = 0.924)

log Kow used: 0.10 (estimated)

Volatilization from Water:

Henry LC: 3.88E-005 atm-m3/mole (estimated by Group SAR Method)

Half-Life from Model River: 15.96 hours

Half-Life from Model Lake : 257.1 hours (10.71 days)

Removal In Wastewater Treatment:

Total removal: 3.88 percent

Total biodegradation: 0.09 percent

Total sludge adsorption: 1.73 percent

Total to Air: 2.06 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 1.5 8.41 1000

Water 40.1 360 1000

Soil 58.3 720 1000

Sediment 0.0913 3.24e+003 0

Persistence Time: 320 hr

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