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CAS Num: 013925-00-3

SMILES : n(ccnc1CC)c1

CHEM : Pyrazine, ethyl-


MOL WT : 108.14

------------------------------ 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) = 0.98

Log Kow (Exper. database match) = 0.69

Exper. Ref: YAMAGAMI,C ET AL. (1990A)

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

Boiling Pt (deg C): 168.65 (Adapted Stein & Brown method)

Melting Pt (deg C): 19.27 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 3.57 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 476 (Mean VP of Antoine & Grain methods)

BP (exp database): 152.5 deg C

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

Water Solubility at 25 deg C (mg/L): 2.841e+004

log Kow used: 0.69 (expkow database)

no-melting pt equation used

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 63521 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:

Neutral Organics

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

Bond Method : 4.28E-006 atm-m3/mole (4.33E-001 Pa-m3/mole)

Group Method: 1.44E-008 atm-m3/mole (1.46E-003 Pa-m3/mole)

Exper Database: 2.45E-06 atm-m3/mole (2.48E-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: 1.788E-005 atm-m3/mole (1.812E+000 Pa-m3/mole)

VP: 3.57 mm Hg (source: MPBPVP)

WS: 2.84E+004 mg/L (source: WSKOWWIN)

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

Log Kow used: 0.69 (exp database)

Log Kaw used: -3.999 (exp database)

Log Koa (KOAWIN v1.10 estimate): 4.689

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.7507

Biowin2 (Non-Linear Model) : 0.8860

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 2.8853 (weeks )

Biowin4 (Primary Survey Model) : 3.6232 (days-weeks )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.3598

Biowin6 (MITI Non-Linear Model): 0.4156

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.3484

Ready Biodegradability Prediction: NO

Hydrocarbon Biodegradation (BioHCwin v1.01):

Structure incompatible with current estimation method!

Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:

Vapor pressure (liquid/subcooled): 435 Pa (3.26 mm Hg)

Log Koa (Koawin est ): 4.689

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

Mackay model : 6.9E-009

Octanol/air (Koa) model: 1.2E-008

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 2.49E-007

Mackay model : 5.52E-007

Octanol/air (Koa) model: 9.6E-007

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 1.6728 E-12 cm3/molecule-sec

Half-Life = 6.394 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 76.729 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

4.01E-007 (Junge-Pankow, Mackay avg)

9.6E-007 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 113 L/kg (MCI method)

Log Koc: 2.053 (MCI method)

Koc : 50.72 L/kg (Kow method)

Log Koc: 1.705 (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) = -0.7165 days (HL = 0.1921 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.132 (BCF = 1.354)

Log BAF Arnot-Gobas method (upper trophic) = 0.132 (BAF = 1.354)

log Kow used: 0.69 (expkow database)

Volatilization from Water:

Henry LC: 2.45E-006 atm-m3/mole (Henry experimental database)

Half-Life from Model River: 249.6 hours (10.4 days)

Half-Life from Model Lake : 2810 hours (117.1 days)

Removal In Wastewater Treatment:

Total removal: 2.00 percent

Total biodegradation: 0.09 percent

Total sludge adsorption: 1.77 percent

Total to Air: 0.14 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 4.42 153 1000

Water 26.3 360 1000

Soil 69.1 720 1000

Sediment 0.167 3.24e+003 0

Persistence Time: 482 hr

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