Octamethylcyclotetrasiloxane

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) =  5.09
    Log Kow (Exper. database match) =  5.10
       Exper. Ref:  TSCATS

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  159.41  (Adapted Stein & Brown method)
    Melting Pt (deg C):  1.78  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  1.18  (Mean VP of Antoine & Grain methods)
    MP  (exp database):  17.5 deg C
    BP  (exp database):  175.8 deg C
    VP  (exp database):  1.05E+00 mm Hg at 25 deg C

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  0.05475
       log Kow used: 5.10 (expkow database)
       no-melting pt equation used
     Water Sol (Exper. database match) =  0.005 mg/L (25 deg C)
        Exper. Ref:  DOW CORNING (1987)

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  0.17229 mg/L
    Wat Sol (Exper. database match) =  0.01
       Exper. Ref:  DOW CORNING (1987)

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   8.72E-002  atm-m3/mole
   Group Method:   Incomplete
   Exper Database: 1.17E-01  atm-m3/mole
 Henrys LC [VP/WSol estimate using EPI values]:  8.412E+000 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  5.10  (exp database)
  Log Kaw used:  0.680  (exp database)
      Log Koa (KOAWIN v1.10 estimate):  4.420
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.6063
   Biowin2 (Non-Linear Model)     :   0.2309
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.5437  (weeks-months)
   Biowin4 (Primary Survey Model) :   3.4198  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :  -0.1670
   Biowin6 (MITI Non-Linear Model):   0.0028
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.1995
 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):  140 Pa (1.05 mm Hg)
  Log Koa (Koawin est  ): 4.420
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  2.14E-008 
       Octanol/air (Koa) model:  6.46E-009 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  7.74E-007 
       Mackay model           :  1.71E-006 
       Octanol/air (Koa) model:  5.17E-007 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   1.1968 E-12 cm3/molecule-sec
      Half-Life =     8.937 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =   107.246 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 1.24E-006 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  1.796E+004
      Log Koc:  4.254 

 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 = 3.227 (BCF = 1687)
       log Kow used: 5.10 (expkow database)

 Volatilization from Water:
    Henry LC:  0.117 atm-m3/mole  (Henry experimental database)
    Half-Life from Model River:      1.766  hours
    Half-Life from Model Lake :      163.7  hours   (6.82 days)

 Removal In Wastewater Treatment (recommended maximum 95%):
    Total removal:              98.55  percent
    Total biodegradation:        0.19  percent
    Total sludge adsorption:    52.15  percent
    Total to Air:               46.21  percent
      (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
           Mass Amount    Half-Life    Emissions
            (percent)        (hr)       (kg/hr)
   Air       6.8             254          1000       
   Water     9.78            900          1000       
   Soil      55.7            1.8e+003     1000       
   Sediment  27.7            8.1e+003     0          
     Persistence Time: 780 hr