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CAS Number: 18936-17-9


CHEM : 2-Methylbutyronitrile


MOL WT : 83.13

------------------------------ EPI SUMMARY (v4.00) --------------------------

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 v1.67 estimate) = 1.25

Log Kow (Exper. database match) = 1.05

Exper. Ref: TANII,H & HASHIMOTO,K (1984)

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

Boiling Pt (deg C): 129.33 (Adapted Stein & Brown method)

Melting Pt (deg C): -57.60 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 12.5 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 1.67E+003 (Mean VP of Antoine & Grain methods)

BP (exp database): 125 deg C

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

Water Solubility at 25 deg C (mg/L): 8889

log Kow used: 1.05 (expkow database)

no-melting pt equation used

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 18504 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:

Neutral Organics

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

Bond Method : 7.15E-005 atm-m3/mole (7.24E+000 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: 1.538E-004 atm-m3/mole (1.559E+001 Pa-m3/mole)

VP: 12.5 mm Hg (source: MPBPVP)

WS: 8.89E+003 mg/L (source: WSKOWWIN)

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

Log Kow used: 1.05 (exp database)

Log Kaw used: -2.534 (HenryWin est)

Log Koa (KOAWIN v1.10 estimate): 3.584

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 1.0150

Biowin2 (Non-Linear Model) : 0.9985

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 2.9331 (weeks )

Biowin4 (Primary Survey Model) : 3.6626 (days-weeks )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.5360

Biowin6 (MITI Non-Linear Model): 0.6744

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.5371

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): 1.55E+003 Pa (11.6 mm Hg)

Log Koa (Koawin est ): 3.584

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

Mackay model : 1.94E-009

Octanol/air (Koa) model: 9.42E-010

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 7.01E-008

Mackay model : 1.55E-007

Octanol/air (Koa) model: 7.54E-008

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 1.9368 E-12 cm3/molecule-sec

Half-Life = 5.523 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 66.271 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

1.13E-007 (Junge-Pankow, Mackay avg)

7.54E-008 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 24.89 L/kg (MCI method)

Log Koc: 1.396 (MCI method)

Koc : 79.08 L/kg (Kow method)

Log Koc: 1.898 (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 = 0.360 (BCF = 2.29 L/kg wet-wt)

Log Biotransformation Half-life (HL) = -0.9502 days (HL = 0.1122 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.268 (BCF = 1.855)

Log BAF Arnot-Gobas method (upper trophic) = 0.268 (BAF = 1.855)

log Kow used: 1.05 (expkow database)

Volatilization from Water:

Henry LC: 7.15E-005 atm-m3/mole (estimated by Bond SAR Method)

Half-Life from Model River: 8.396 hours

Half-Life from Model Lake : 168 hours (7.002 days)

Removal In Wastewater Treatment:

Total removal: 5.46 percent

Total biodegradation: 0.09 percent

Total sludge adsorption: 1.74 percent

Total to Air: 3.62 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 8.63 133 1000

Water 32.7 360 1000

Soil 58.6 720 1000

Sediment 0.0939 3.24e+003 0

Persistence Time: 353 hr

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