Malathion

Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module, version: 14.00

Predicted data is generated using the US Environmental Protection Agency�s EPISuite™

                        
 Log Octanol-Water Partition Coef (SRC):
    Log Kow (KOWWIN v1.67 estimate) =  2.29
    Log Kow (Exper. database match) =  2.36
       Exper. Ref:  Hansch,C et al. (1995)

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  351.17  (Adapted Stein & Brown method)
    Melting Pt (deg C):  -23.58  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  0.000124  (Modified Grain method)
    MP  (exp database):  2.8 deg C
    BP  (exp database):  156-157 @ 0.7 mm Hg deg C
    VP  (exp database):  3.38E-06 mm Hg at 25 deg C

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  78.45
       log Kow used: 2.36 (expkow database)
       no-melting pt equation used
     Water Sol (Exper. database match) =  143 mg/L (20 deg C)
        Exper. Ref:  BOWMAN,BT & SANS,WW (1983)

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  427.53 mg/L
    Wat Sol (Exper. database match) =  143.00
       Exper. Ref:  BOWMAN,BT & SANS,WW (1983)

 ECOSAR Class Program (ECOSAR v0.99h):
    Class(es) found:
       Esters
       Esters (phosphate)
       Nearest analog analysis: pesticides

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   8.39E-010  atm-m3/mole
   Group Method:   Incomplete
   Exper Database: 4.89E-09  atm-m3/mole
 Henrys LC [VP/WSol estimate using EPI values]:  6.871E-007 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  2.36  (exp database)
  Log Kaw used:  -6.699  (exp database)
      Log Koa (KOAWIN v1.10 estimate):  9.059
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   1.2526
   Biowin2 (Non-Linear Model)     :   1.0000
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.9033  (weeks       )
   Biowin4 (Primary Survey Model) :   4.2944  (hours-days  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.6707
   Biowin6 (MITI Non-Linear Model):   0.5691
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  1.3006
 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):  0.000451 Pa (3.38E-006 mm Hg)
  Log Koa (Koawin est  ): 9.059
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  0.00666 
       Octanol/air (Koa) model:  0.000281 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  0.194 
       Mackay model           :  0.347 
       Octanol/air (Koa) model:  0.022 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =  77.4198 E-12 cm3/molecule-sec
      Half-Life =     0.138 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =     1.658 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 0.271 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  30.5
      Log Koc:  1.484 

 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]:
  Total Kb for pH > 8 at 25 deg C :  6.056E-002  L/mol-sec
  Kb Half-Life at pH 8:     132.459  days   
  Kb Half-Life at pH 7:       3.627  years  

 Bioaccumulation Estimates from Log Kow (BCFWIN v2.17):
   Log BCF from regression-based method = 1.117 (BCF = 13.1)
       log Kow used: 2.36 (expkow database)

 Volatilization from Water:
    Henry LC:  4.89E-009 atm-m3/mole  (Henry experimental database)
    Half-Life from Model River: 2.176E+005  hours   (9067 days)
    Half-Life from Model Lake : 2.374E+006  hours   (9.892E+004 days)

 Removal In Wastewater Treatment:
    Total removal:               2.76  percent
    Total biodegradation:        0.10  percent
    Total sludge adsorption:     2.66  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       0.0713          3.32         1000       
   Water     21.3            360          1000       
   Soil      78.5            720          1000       
   Sediment  0.12            3.24e+003    0          
     Persistence Time: 651 hr