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CAS Num: 004177-16-6
SMILES : n(ccn1)cc1C=C
CHEM : PYRAZINE, ETHENYL-
MOL FOR: C6 H6 N2
MOL WT : 106.13
------------------------------ 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) = 0.84
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.43):
Boiling Pt (deg C): 167.06 (Adapted Stein & Brown method)
Melting Pt (deg C): 17.92 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 1.8 (Mean VP of Antoine & Grain methods)
VP (Pa, 25 deg C) : 240 (Mean VP of Antoine & Grain methods)
Water Solubility Estimate from Log Kow (WSKOW v1.41):
Water Solubility at 25 deg C (mg/L): 2.138e+004
log Kow used: 0.84 (estimated)
no-melting pt equation used
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 64499 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Neutral Organics
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 1.50E-006 atm-m3/mole (1.52E-001 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: 1.176E-005 atm-m3/mole (1.191E+000 Pa-m3/mole)
VP: 1.8 mm Hg (source: MPBPVP)
WS: 2.14E+004 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: 0.84 (KowWin est)
Log Kaw used: -4.212 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 5.052
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.6970
Biowin2 (Non-Linear Model) : 0.8178
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 2.9646 (weeks )
Biowin4 (Primary Survey Model) : 3.6946 (days-weeks )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.4396
Biowin6 (MITI Non-Linear Model): 0.4770
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.3292
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): 219 Pa (1.64 mm Hg)
Log Koa (Koawin est ): 5.052
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 1.37E-008
Octanol/air (Koa) model: 2.77E-008
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 4.96E-007
Mackay model : 1.1E-006
Octanol/air (Koa) model: 2.21E-006
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 26.5162 E-12 cm3/molecule-sec
Half-Life = 0.403 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 4.841 Hrs
Ozone Reaction:
OVERALL Ozone Rate Constant = 2.100000 E-17 cm3/molecule-sec
Half-Life = 0.546 Days (at 7E11 mol/cm3)
Half-Life = 13.097 Hrs
Fraction sorbed to airborne particulates (phi):
7.97E-007 (Junge-Pankow, Mackay avg)
2.21E-006 (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 : 61.4 L/kg (Kow method)
Log Koc: 1.788 (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) = -0.4547 days (HL = 0.351 days)
Log BCF Arnot-Gobas method (upper trophic) = 0.200 (BCF = 1.584)
Log BAF Arnot-Gobas method (upper trophic) = 0.200 (BAF = 1.584)
log Kow used: 0.84 (estimated)
Volatilization from Water:
Henry LC: 1.5E-006 atm-m3/mole (estimated by Bond SAR Method)
Half-Life from Model River: 403.2 hours (16.8 days)
Half-Life from Model Lake : 4484 hours (186.9 days)
Removal In Wastewater Treatment:
Total removal: 1.96 percent
Total biodegradation: 0.09 percent
Total sludge adsorption: 1.78 percent
Total to Air: 0.09 percent
(using 10000 hr Bio P,A,S)
Level III Fugacity Model:
Mass Amount Half-Life Emissions
(percent) (hr) (kg/hr)
Air 0.562 5.57 1000
Water 27.7 360 1000
Soil 71.6 720 1000
Sediment 0.176 3.24e+003 0
Persistence Time: 443 hr