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CAS Number: 37622-90-5

SMILES : CCOC(=O)c1cnnc1

CHEM : ethyl 1H-pyrazole-4-carboxylate

MOL FOR: C6 H8 N2 O2

MOL WT : 140.14

------------------------------ 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) = 0.38

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

Boiling Pt (deg C): 273.47 (Adapted Stein & Brown method)

Melting Pt (deg C): 63.74 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 0.00343 (Modified Grain method)

VP (Pa, 25 deg C) : 0.457 (Modified Grain method)

Subcooled liquid VP: 0.00789 mm Hg (25 deg C, Mod-Grain method)

: 1.05 Pa (25 deg C, Mod-Grain method)

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

Water Solubility at 25 deg C (mg/L): 3.923e+004

log Kow used: 0.38 (estimated)

no-melting pt equation used

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 1.2006e+005 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:



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

Bond Method : 3.16E-008 atm-m3/mole (3.20E-003 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: 1.612E-008 atm-m3/mole (1.634E-003 Pa-m3/mole)

VP: 0.00343 mm Hg (source: MPBPVP)

WS: 3.92E+004 mg/L (source: WSKOWWIN)

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

Log Kow used: 0.38 (KowWin est)

Log Kaw used: -5.889 (HenryWin est)

Log Koa (KOAWIN v1.10 estimate): 6.269

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.8550

Biowin2 (Non-Linear Model) : 0.9939

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 3.0297 (weeks )

Biowin4 (Primary Survey Model) : 3.8745 (days )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.7052

Biowin6 (MITI Non-Linear Model): 0.8341

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.7635

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): 1.05 Pa (0.00789 mm Hg)

Log Koa (Koawin est ): 6.269

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

Mackay model : 2.85E-006

Octanol/air (Koa) model: 4.56E-007

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 0.000103

Mackay model : 0.000228

Octanol/air (Koa) model: 3.65E-005

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 13.2993 E-12 cm3/molecule-sec

Half-Life = 0.804 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 9.651 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

0.000166 (Junge-Pankow, Mackay avg)

3.65E-005 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 17.02 L/kg (MCI method)

Log Koc: 1.231 (MCI method)

Koc : 29.38 L/kg (Kow method)

Log Koc: 1.468 (Kow method)

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

Total Kb for pH > 8 at 25 deg C : 3.776E-002 L/mol-sec

Kb Half-Life at pH 8: 212.462 days

Kb Half-Life at pH 7: 5.817 years

(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) = -1.7366 days (HL = 0.01834 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.001 (BCF = 1.001)

Log BAF Arnot-Gobas method (upper trophic) = 0.001 (BAF = 1.001)

log Kow used: 0.38 (estimated)

Volatilization from Water:

Henry LC: 3.16E-008 atm-m3/mole (estimated by Bond SAR Method)

Half-Life from Model River: 2.193E+004 hours (913.9 days)

Half-Life from Model Lake : 2.394E+005 hours (9974 days)

Removal In Wastewater Treatment:

Total removal: 1.86 percent

Total biodegradation: 0.09 percent

Total sludge adsorption: 1.76 percent

Total to Air: 0.00 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 0.48 19.3 1000

Water 29.8 360 1000

Soil 69.6 720 1000

Sediment 0.0759 3.24e+003 0

Persistence Time: 567 hr

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