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CAS Num: 007779-75-1


CHEM : Butanoic acid, 3-oxo-, 2-methylpropyl ester

MOL FOR: C8 H14 O3

MOL WT : 158.20

------------------------------ 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) = 0.71

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

Boiling Pt (deg C): 197.90 (Adapted Stein & Brown method)

Melting Pt (deg C): -7.04 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 0.401 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 53.4 (Mean VP of Antoine & Grain methods)

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

Water Solubility at 25 deg C (mg/L): 1.742e+004

log Kow used: 0.71 (estimated)

no-melting pt equation used

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 32694 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:


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

Bond Method : 2.76E-007 atm-m3/mole (2.80E-002 Pa-m3/mole)

Group Method: Incomplete

For Henry LC Comparison Purposes:

User-Entered Henry LC: not entered

Henrys LC [via VP/WSol estimate using User-Entered or Estimated values]:

HLC: 4.792E-006 atm-m3/mole (4.855E-001 Pa-m3/mole)

VP: 0.401 mm Hg (source: MPBPVP)

WS: 1.74E+004 mg/L (source: WSKOWWIN)

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

Log Kow used: 0.71 (KowWin est)

Log Kaw used: -4.948 (HenryWin est)

Log Koa (KOAWIN v1.10 estimate): 5.658

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.8532

Biowin2 (Non-Linear Model) : 0.9877

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 2.9673 (weeks )

Biowin4 (Primary Survey Model) : 3.8262 (days )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.7524

Biowin6 (MITI Non-Linear Model): 0.8865

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.2635

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): 48.8 Pa (0.366 mm Hg)

Log Koa (Koawin est ): 5.658

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

Mackay model : 6.15E-008

Octanol/air (Koa) model: 1.12E-007

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 2.22E-006

Mackay model : 4.92E-006

Octanol/air (Koa) model: 8.93E-006

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 4.8780 E-12 cm3/molecule-sec

Half-Life = 2.193 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 26.312 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

3.57E-006 (Junge-Pankow, Mackay avg)

8.93E-006 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 10 L/kg (MCI method)

Log Koc: 1.000 (MCI method)

Koc : 28.04 L/kg (Kow method)

Log Koc: 1.448 (Kow method)

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

Total Kb for pH > 8 at 25 deg C : 2.937E-001 L/mol-sec

Kb Half-Life at pH 8: 27.314 days

Kb Half-Life at pH 7: 273.138 days

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

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) = -2.0741 days (HL = 0.008432 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.011 (BCF = 1.025)

Log BAF Arnot-Gobas method (upper trophic) = 0.011 (BAF = 1.025)

log Kow used: 0.71 (estimated)

Volatilization from Water:

Henry LC: 2.76E-007 atm-m3/mole (estimated by Bond SAR Method)

Half-Life from Model River: 2669 hours (111.2 days)

Half-Life from Model Lake : 2.923E+004 hours (1218 days)

Removal In Wastewater Treatment:

Total removal: 1.88 percent

Total biodegradation: 0.09 percent

Total sludge adsorption: 1.77 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 2.34 52.6 1000

Water 35.7 360 1000

Soil 61.8 720 1000

Sediment 0.0805 3.24e+003 0

Persistence Time: 458 hr

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