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CAS Num: 000116-53-0

SMILES : O=C(O)C(CC)C

CHEM : Butanoic acid, 2-methyl-

MOL FOR: C5 H10 O2

MOL WT : 102.13

------------------------------ 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) = 1.49

Log Kow (Exper. database match) = 1.18

Exper. Ref: HANSCH,C ET AL. (1995)

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

Boiling Pt (deg C): 175.25 (Adapted Stein & Brown method)

Melting Pt (deg C): 3.61 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 1.12 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 149 (Mean VP of Antoine & Grain methods)

MP (exp database): <-80 deg C

BP (exp database): 177 deg C

VP (exp database): 4.91E-01 mm Hg (6.55E+001 Pa) at 25 deg C

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

Water Solubility at 25 deg C (mg/L): 2.811e+004

log Kow used: 1.18 (expkow database)

no-melting pt equation used

Water Sol (Exper. database match) = 4.5e+004 mg/L (20 deg C)

Exper. Ref: RIEMENSCHNEIDER,W (1986)

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 53838 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 : 1.28E-006 atm-m3/mole (1.30E-001 Pa-m3/mole)

Group Method: 1.28E-006 atm-m3/mole (1.30E-001 Pa-m3/mole)

Exper Database: 1.47E-06 atm-m3/mole (1.49E-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: 5.354E-006 atm-m3/mole (5.425E-001 Pa-m3/mole)

VP: 1.12 mm Hg (source: MPBPVP)

WS: 2.81E+004 mg/L (source: WSKOWWIN)

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

Log Kow used: 1.18 (exp database)

Log Kaw used: -4.221 (exp database)

Log Koa (KOAWIN v1.10 estimate): 5.401

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.7716

Biowin2 (Non-Linear Model) : 0.9004

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 3.3381 (days-weeks )

Biowin4 (Primary Survey Model) : 4.0860 (days )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.5890

Biowin6 (MITI Non-Linear Model): 0.7466

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.7239

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): 65.5 Pa (0.491 mm Hg)

Log Koa (Koawin est ): 5.401

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

Mackay model : 4.58E-008

Octanol/air (Koa) model: 6.18E-008

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 1.66E-006

Mackay model : 3.67E-006

Octanol/air (Koa) model: 4.94E-006

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 3.7930 E-12 cm3/molecule-sec

Half-Life = 2.820 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 33.839 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

2.66E-006 (Junge-Pankow, Mackay avg)

4.94E-006 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 4.296 L/kg (MCI method)

Log Koc: 0.633 (MCI method)

Koc : 6.433 L/kg (Kow method)

Log Koc: 0.808 (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 v3.00):

Log BCF from regression-based method = 0.500 (BCF = 3.162 L/kg wet-wt)

Log Biotransformation Half-life (HL) = -0.7328 days (HL = 0.185 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.361 (BCF = 2.294)

Log BAF Arnot-Gobas method (upper trophic) = 0.361 (BAF = 2.294)

log Kow used: 1.18 (expkow database)

Volatilization from Water:

Henry LC: 1.47E-006 atm-m3/mole (Henry experimental database)

Half-Life from Model River: 403.5 hours (16.81 days)

Half-Life from Model Lake : 4487 hours (187 days)

Removal In Wastewater Treatment:

Total removal: 1.99 percent

Total biodegradation: 0.09 percent

Total sludge adsorption: 1.81 percent

Total to Air: 0.08 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 5.94 67.7 1000

Water 37.9 208 1000

Soil 56.1 416 1000

Sediment 0.0717 1.87e+003 0

Persistence Time: 265 hr

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