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CAS Number: 68378-13-2
SMILES : COc1c(nccn1)C
CHEM : Pyrazine, 2-methoxy-3(or 5)-methyl-
MOL FOR: C6 H8 N2 O1
MOL WT : 124.14
------------------------------ 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) = 1.46
Log Kow (Exper. database match) = 1.24
Exper. Ref: YAMAGAMI,C ET AL. (1991)
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):
Boiling Pt (deg C): 190.27 (Adapted Stein & Brown method)
Melting Pt (deg C): 20.19 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 0.584 (Mean VP of Antoine & Grain methods)
VP (Pa, 25 deg C) : 77.9 (Mean VP of Antoine & Grain methods)
Water Solubility Estimate from Log Kow (WSKOW v1.41):
Water Solubility at 25 deg C (mg/L): 8457
log Kow used: 1.24 (expkow database)
no-melting pt equation used
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 1.1816e+005 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Neutral Organics
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 1.74E-006 atm-m3/mole (1.76E-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: 1.128E-005 atm-m3/mole (1.143E+000 Pa-m3/mole)
VP: 0.584 mm Hg (source: MPBPVP)
WS: 8.46E+003 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: 1.24 (exp database)
Log Kaw used: -4.148 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 5.388
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.8750
Biowin2 (Non-Linear Model) : 0.9832
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 2.7919 (weeks )
Biowin4 (Primary Survey Model) : 3.6772 (days-weeks )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.5964
Biowin6 (MITI Non-Linear Model): 0.6966
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.3719
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): 70.9 Pa (0.532 mm Hg)
Log Koa (Koawin est ): 5.388
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 4.23E-008
Octanol/air (Koa) model: 6E-008
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 1.53E-006
Mackay model : 3.38E-006
Octanol/air (Koa) model: 4.8E-006
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 4.0751 E-12 cm3/molecule-sec
Half-Life = 2.625 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 31.497 Hrs
Ozone Reaction:
No Ozone Reaction Estimation
Fraction sorbed to airborne particulates (phi):
2.46E-006 (Junge-Pankow, Mackay avg)
4.8E-006 (Koa method)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (KOCWIN v2.00):
Koc : 38.73 L/kg (MCI method)
Log Koc: 1.588 (MCI method)
Koc : 116.2 L/kg (Kow method)
Log Koc: 2.065 (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 = 0.485 (BCF = 3.056 L/kg wet-wt)
Log Biotransformation Half-life (HL) = -0.6749 days (HL = 0.2114 days)
Log BCF Arnot-Gobas method (upper trophic) = 0.402 (BCF = 2.525)
Log BAF Arnot-Gobas method (upper trophic) = 0.402 (BAF = 2.525)
log Kow used: 1.24 (expkow database)
Volatilization from Water:
Henry LC: 1.74E-006 atm-m3/mole (estimated by Bond SAR Method)
Half-Life from Model River: 376 hours (15.67 days)
Half-Life from Model Lake : 4196 hours (174.8 days)
Removal In Wastewater Treatment:
Total removal: 2.01 percent
Total biodegradation: 0.09 percent
Total sludge adsorption: 1.82 percent
Total to Air: 0.10 percent
(using 10000 hr Bio P,A,S)
Level III Fugacity Model:
Mass Amount Half-Life Emissions
(percent) (hr) (kg/hr)
Air 3.4 63 1000
Water 30.7 360 1000
Soil 65.8 720 1000
Sediment 0.106 3.24e+003 0
Persistence Time: 445 hr