CAS Number: 123-33-1
SMILES : C1=CC(=O)NNC1(=O)
CHEM   : 3,6-Pyridazinedione, 1,2-dihydro-
MOL FOR: C4 H4 N2 O2 
MOL WT : 112.09
------------------------------ EPI SUMMARY (v4.11) --------------------------
 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 v1.68 estimate) =  -0.89
    Log Kow (Exper. database match) =  -0.84
       Exper. Ref:  HANSCH,C ET AL. (1995)
 
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):
    Boiling Pt (deg C):  367.19  (Adapted Stein & Brown method)
    Melting Pt (deg C):  149.71  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  3.68E-008  (Modified Grain method)
    VP (Pa, 25 deg C) :  4.9E-006  (Modified Grain method)
    MP  (exp database):  306 deg C
    Subcooled liquid VP: 5.14E-005 mm Hg (25 deg C, Mod-Grain method)
                       : 0.00685 Pa (25 deg C, Mod-Grain method)
 
 Water Solubility Estimate from Log Kow (WSKOW v1.42):
    Water Solubility at 25 deg C (mg/L):  2.735e+004
       log Kow used: -0.84 (expkow database)
       no-melting pt equation used
     Water Sol (Exper. database match) =  4510 mg/L (25 deg C)
        Exper. Ref:  TOMLIN,C (1994)
 
 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  1e+006 mg/L
 
 ECOSAR Class Program (ECOSAR v1.11):
    Class(es) found:
       Hydrazines
 
 Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
   Bond Method :   2.65E-011  atm-m3/mole  (2.68E-006 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:  1.984E-013 atm-m3/mole  (2.011E-008 Pa-m3/mole)
      VP:   3.68E-008 mm Hg (source: MPBPVP)
      WS:   2.74E+004 mg/L (source: WSKOWWIN)
 
 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  -0.84  (exp database)
  Log Kaw used:  -8.965  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  8.125
      Log Koa (experimental database):  None
 
 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.6942
   Biowin2 (Non-Linear Model)     :   0.8049
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.9515  (weeks       )
   Biowin4 (Primary Survey Model) :   3.6860  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.0181
   Biowin6 (MITI Non-Linear Model):   0.0000
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.6890
 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):  0.00685 Pa (5.14E-005 mm Hg)
  Log Koa (Koawin est  ): 8.125
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  0.000438 
       Octanol/air (Koa) model:  3.27E-005 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  0.0156 
       Mackay model           :  0.0338 
       Octanol/air (Koa) model:  0.00261 
 
 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =  13.2560 E-12 cm3/molecule-sec
      Half-Life =     0.807 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =     9.683 Hrs
   Ozone Reaction:
      OVERALL Ozone Rate Constant =     0.175000 E-17 cm3/molecule-sec
      Half-Life =     6.549 Days (at 7E11 mol/cm3)
   Fraction sorbed to airborne particulates (phi):
      0.0247 (Junge-Pankow, Mackay avg)
      0.00261 (Koa method)
    Note: the sorbed fraction may be resistant to atmospheric oxidation
 
 Soil Adsorption Coefficient (KOCWIN v2.00):
      Koc    :  3.303  L/kg (MCI method)
      Log Koc:  0.519       (MCI method)
      Koc    :  2.837  L/kg (Kow method)
      Log Koc:  0.453       (Kow method)
       Experimental Log Koc:  0.45  (database)
 
 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v2.00]:
    Rate constants can NOT be estimated for this structure!
 
 Bioaccumulation Estimates (BCFBAF v3.01):
   Log BCF from regression-based method = 0.500 (BCF = 3.162 L/kg wet-wt)
   Log Biotransformation Half-life (HL) = -1.8850 days (HL = 0.01303 days)
   Log BCF Arnot-Gobas method (upper trophic) = -0.047 (BCF = 0.8983)
   Log BAF Arnot-Gobas method (upper trophic) = -0.047 (BAF = 0.8983)
       log Kow used: -0.84 (expkow database)
 
 Volatilization from Water:
    Henry LC:  2.65E-011 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 2.339E+007  hours   (9.746E+005 days)
    Half-Life from Model Lake : 2.552E+008  hours   (1.063E+007 days)
 
 Removal In Wastewater Treatment:
    Total removal:               1.85  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       0.00145         17.2         1000       
   Water     35.3            360          1000       
   Soil      64.6            720          1000       
   Sediment  0.0695          3.24e+003    0          
     Persistence Time: 604 hr