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CAS Num: 000109-19-3


CHEM : Butanoic acid, 3-methyl-, butyl ester

MOL FOR: C9 H18 O2

MOL WT : 158.24

------------------------------ 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) = 3.25

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

Boiling Pt (deg C): 178.41 (Adapted Stein & Brown method)

Melting Pt (deg C): -32.06 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 1.04 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 139 (Mean VP of Antoine & Grain methods)

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

Water Solubility at 25 deg C (mg/L): 117.8

log Kow used: 3.25 (estimated)

no-melting pt equation used

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 242.04 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:


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

Bond Method : 9.60E-004 atm-m3/mole (9.73E+001 Pa-m3/mole)

Group Method: 1.07E-003 atm-m3/mole (1.08E+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: 1.838E-003 atm-m3/mole (1.863E+002 Pa-m3/mole)

VP: 1.04 mm Hg (source: MPBPVP)

WS: 118 mg/L (source: WSKOWWIN)

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

Log Kow used: 3.25 (KowWin est)

Log Kaw used: -1.406 (HenryWin est)

Log Koa (KOAWIN v1.10 estimate): 4.656

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.9548

Biowin2 (Non-Linear Model) : 0.9988

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 3.2880 (days-weeks )

Biowin4 (Primary Survey Model) : 4.1175 (days )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.7333

Biowin6 (MITI Non-Linear Model): 0.8889

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.3896

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): 126 Pa (0.947 mm Hg)

Log Koa (Koawin est ): 4.656

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

Mackay model : 2.38E-008

Octanol/air (Koa) model: 1.11E-008

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 8.58E-007

Mackay model : 1.9E-006

Octanol/air (Koa) model: 8.89E-007

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 7.6442 E-12 cm3/molecule-sec

Half-Life = 1.399 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 16.791 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

1.38E-006 (Junge-Pankow, Mackay avg)

8.89E-007 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 98.81 L/kg (MCI method)

Log Koc: 1.995 (MCI method)

Koc : 454.1 L/kg (Kow method)

Log Koc: 2.657 (Kow method)

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

Total Kb for pH > 8 at 25 deg C : 1.430E-002 L/mol-sec

Kb Half-Life at pH 8: 1.536 years

Kb Half-Life at pH 7: 15.360 years

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

Bioaccumulation Estimates (BCFBAF v3.00):

Log BCF from regression-based method = 1.809 (BCF = 64.39 L/kg wet-wt)

Log Biotransformation Half-life (HL) = -1.0307 days (HL = 0.09317 days)

Log BCF Arnot-Gobas method (upper trophic) = 1.509 (BCF = 32.3)

Log BAF Arnot-Gobas method (upper trophic) = 1.509 (BAF = 32.3)

log Kow used: 3.25 (estimated)

Volatilization from Water:

Henry LC: 0.00107 atm-m3/mole (estimated by Group SAR Method)

Half-Life from Model River: 1.972 hours

Half-Life from Model Lake : 127 hours (5.291 days)

Removal In Wastewater Treatment:

Total removal: 35.80 percent

Total biodegradation: 0.11 percent

Total sludge adsorption: 7.06 percent

Total to Air: 28.63 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 11.4 33.6 1000

Water 31.4 208 1000

Soil 57 416 1000

Sediment 0.157 1.87e+003 0

Persistence Time: 172 hr

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