6,6-Dimethyldihydro-2H-pyran-2,4(3H)-dione

Predicted data is generated using the ACD/Labs’ ACD/PhysChem Suite, for more information see their website.

Predicted data is generated using the US Environmental Protection Agency’s EPISuite™, for more information see their website.

                    
 Log Octanol-Water Partition Coef (SRC):
    Log Kow (KOWWIN v1.67 estimate) =  0.81

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  271.85  (Adapted Stein & Brown method)
    Melting Pt (deg C):  44.71  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  0.00568  (Modified Grain method)
    Subcooled liquid VP: 0.00859 mm Hg (25 deg C, Mod-Grain method)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  1.654e+004
       log Kow used: 0.81 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  1.4218e+005 mg/L

 ECOSAR Class Program (ECOSAR v0.99h):
    Class(es) found:
       Esters

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   9.17E-008  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  6.424E-008 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  0.81  (KowWin est)
  Log Kaw used:  -5.426  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  6.236
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.6769
   Biowin2 (Non-Linear Model)     :   0.9475
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.7906  (weeks       )
   Biowin4 (Primary Survey Model) :   3.6959  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.8586
   Biowin6 (MITI Non-Linear Model):   0.9316
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model): -0.1174
 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):  1.15 Pa (0.00859 mm Hg)
  Log Koa (Koawin est  ): 6.236
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  2.62E-006 
       Octanol/air (Koa) model:  4.23E-007 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  9.46E-005 
       Mackay model           :  0.00021 
       Octanol/air (Koa) model:  3.38E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   1.4133 E-12 cm3/molecule-sec
      Half-Life =     7.568 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =    90.815 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 0.000152 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  2.863
      Log Koc:  0.457 

 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]:
    Rate constants can NOT be estimated for this structure!

 Bioaccumulation Estimates from Log Kow (BCFWIN v2.17):
   Log BCF from regression-based method = 0.500 (BCF = 3.162)
       log Kow used: 0.81 (estimated)

 Volatilization from Water:
    Henry LC:  9.17E-008 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River:       7614  hours   (317.2 days)
    Half-Life from Model Lake : 8.316E+004  hours   (3465 days)

 Removal In Wastewater Treatment:
    Total removal:               1.88  percent
    Total biodegradation:        0.09  percent
    Total sludge adsorption:     1.78  percent
    Total to Air:                0.01  percent
      (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
           Mass Amount    Half-Life    Emissions
            (percent)        (hr)       (kg/hr)
   Air       1.63            182          1000       
   Water     37.8            360          1000       
   Soil      60.5            720          1000       
   Sediment  0.0733          3.24e+003    0          
     Persistence Time: 523 hr