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CAS Num: 000138-22-7


CHEM : Propanoic acid, 2-hydroxy-, butyl ester

MOL FOR: C7 H14 O3

MOL WT : 146.19

------------------------------ 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) = 0.80

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

Boiling Pt (deg C): 207.17 (Adapted Stein & Brown method)

Melting Pt (deg C): -4.53 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 0.17 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 22.7 (Mean VP of Antoine & Grain methods)

MP (exp database): -28 deg C

BP (exp database): 186 deg C

VP (exp database): 4.00E-01 mm Hg (5.33E+001 Pa) at 20 deg C

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

Water Solubility at 25 deg C (mg/L): 5.298e+004

log Kow used: 0.80 (estimated)

no-melting pt equation used

Water Sol (Exper. database match) = 4e+004 mg/L (20 deg C)


Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 64416 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:


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

Bond Method : 8.49E-005 atm-m3/mole (8.61E+000 Pa-m3/mole)

Group Method: Incomplete

Exper Database: 1.92E-06 atm-m3/mole (1.95E-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: 6.172E-007 atm-m3/mole (6.254E-002 Pa-m3/mole)

VP: 0.17 mm Hg (source: MPBPVP)

WS: 5.3E+004 mg/L (source: WSKOWWIN)

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

Log Kow used: 0.80 (KowWin est)

Log Kaw used: -4.105 (exp database)

Log Koa (KOAWIN v1.10 estimate): 4.905

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 1.1193

Biowin2 (Non-Linear Model) : 0.9997

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 3.4746 (days-weeks )

Biowin4 (Primary Survey Model) : 4.2643 (hours-days )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.8805

Biowin6 (MITI Non-Linear Model): 0.9518

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.5759

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): 53.3 Pa (0.4 mm Hg)

Log Koa (Koawin est ): 4.905

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

Mackay model : 5.62E-008

Octanol/air (Koa) model: 1.97E-008

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 2.03E-006

Mackay model : 4.5E-006

Octanol/air (Koa) model: 1.58E-006

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 6.9794 E-12 cm3/molecule-sec

Half-Life = 1.532 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 18.390 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

3.27E-006 (Junge-Pankow, Mackay avg)

1.58E-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 : 7.773 L/kg (Kow method)

Log Koc: 0.891 (Kow method)

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

Total Kb for pH > 8 at 25 deg C : 9.482E-001 L/mol-sec

Kb Half-Life at pH 8: 8.460 days

Kb Half-Life at pH 7: 84.602 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) = -2.0827 days (HL = 0.008265 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.022 (BCF = 1.053)

Log BAF Arnot-Gobas method (upper trophic) = 0.022 (BAF = 1.053)

log Kow used: 0.80 (estimated)

Volatilization from Water:

Henry LC: 1.92E-006 atm-m3/mole (Henry experimental database)

Half-Life from Model River: 369.9 hours (15.41 days)

Half-Life from Model Lake : 4137 hours (172.4 days)

Removal In Wastewater Treatment:

Total removal: 1.98 percent

Total biodegradation: 0.09 percent

Total sludge adsorption: 1.78 percent

Total to Air: 0.11 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 4.36 36.8 1000

Water 36.2 208 1000

Soil 59.4 416 1000

Sediment 0.0761 1.87e+003 0

Persistence Time: 262 hr

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