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CAS Num: 000105-54-4


CHEM : Butanoic acid, ethyl ester

MOL FOR: C6 H12 O2

MOL WT : 116.16

------------------------------ 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) = 1.85

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

Boiling Pt (deg C): 125.79 (Adapted Stein & Brown method)

Melting Pt (deg C): -56.83 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 14.6 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 1.95E+003 (Mean VP of Antoine & Grain methods)

MP (exp database): -98 deg C

BP (exp database): 121.5 deg C

VP (exp database): 1.28E+01 mm Hg (1.71E+003 Pa) at 20 deg C

Water Solubility Estimate from Log Kow (WSKOW v1.41):

Water Solubility at 25 deg C (mg/L): 2745

log Kow used: 1.85 (estimated)

no-melting pt equation used

Water Sol (Exper. database match) = 4900 mg/L (20 deg C)

Exper. Ref: RIDDICK,JA ET AL. (1986)

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 4329.4 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:


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

Bond Method : 4.10E-004 atm-m3/mole (4.16E+001 Pa-m3/mole)

Group Method: 3.15E-004 atm-m3/mole (3.19E+001 Pa-m3/mole)

Exper Database: 3.99E-04 atm-m3/mole (4.04E+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: 8.129E-004 atm-m3/mole (8.237E+001 Pa-m3/mole)

VP: 14.6 mm Hg (source: MPBPVP)

WS: 2.75E+003 mg/L (source: WSKOWWIN)

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

Log Kow used: 1.85 (KowWin est)

Log Kaw used: -1.787 (exp database)

Log Koa (KOAWIN v1.10 estimate): 3.637

Log Koa (experimental database): 3.560

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.8664

Biowin2 (Non-Linear Model) : 0.9957

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 3.0827 (weeks )

Biowin4 (Primary Survey Model) : 3.9091 (days )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.8594

Biowin6 (MITI Non-Linear Model): 0.9501

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.9268

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): 1.71E+003 Pa (12.8 mm Hg)

Log Koa (Exp database): 3.560

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

Mackay model : 1.76E-009

Octanol/air (Koa) model: 8.91E-010

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 6.35E-008

Mackay model : 1.41E-007

Octanol/air (Koa) model: 7.13E-008

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 3.3339 E-12 cm3/molecule-sec

Half-Life = 3.208 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 38.499 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

1.02E-007 (Junge-Pankow, Mackay avg)

7.13E-008 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 19.41 L/kg (MCI method)

Log Koc: 1.288 (MCI method)

Koc : 76.35 L/kg (Kow method)

Log Koc: 1.883 (Kow method)

Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v2.00]:

Total Kb for pH > 8 at 25 deg C : 6.266E-002 L/mol-sec

Kb Half-Life at pH 8: 128.021 days

Kb Half-Life at pH 7: 3.505 years

(Total Kb applies only to esters, carbmates, alkyl halides)

Bioaccumulation Estimates (BCFBAF v3.00):

Log BCF from regression-based method = 0.885 (BCF = 7.678 L/kg wet-wt)

Log Biotransformation Half-life (HL) = -1.4652 days (HL = 0.03426 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.628 (BCF = 4.243)

Log BAF Arnot-Gobas method (upper trophic) = 0.628 (BAF = 4.243)

log Kow used: 1.85 (estimated)

Volatilization from Water:

Henry LC: 0.000399 atm-m3/mole (Henry experimental database)

Half-Life from Model River: 2.681 hours

Half-Life from Model Lake : 119.6 hours (4.984 days)

Removal In Wastewater Treatment:

Total removal: 17.07 percent

Total biodegradation: 0.08 percent

Total sludge adsorption: 1.78 percent

Total to Air: 15.21 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 13.7 52 1000

Water 39.8 360 1000

Soil 46.4 720 1000

Sediment 0.105 3.24e+003 0

Persistence Time: 208 hr

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