Prednisone

Data supplied by datasources and users.

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) =  1.59
    Log Kow (Exper. database match) =  1.46
       Exper. Ref:  Hansch,C et al. (1995)

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  502.06  (Adapted Stein & Brown method)
    Melting Pt (deg C):  213.56  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  2.89E-013  (Modified Grain method)
    MP  (exp database):  234 dec deg C
    Subcooled liquid VP: 5.17E-011 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):  312
       log Kow used: 1.46 (expkow database)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  274.18 mg/L

 ECOSAR Class Program (ECOSAR v0.99h):
    Class(es) found:
       Vinyl/Allyl Ketones

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   2.83E-010  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  4.369E-016 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  1.46  (exp database)
  Log Kaw used:  -7.937  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  9.397
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.2043
   Biowin2 (Non-Linear Model)     :   0.0006
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   1.8632  (months      )
   Biowin4 (Primary Survey Model) :   2.9331  (weeks       )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.5678
   Biowin6 (MITI Non-Linear Model):   0.1452
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model): -2.0450
 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):  6.89E-009 Pa (5.17E-011 mm Hg)
  Log Koa (Koawin est  ): 9.397
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  435 
       Octanol/air (Koa) model:  0.000612 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  1 
       Mackay model           :  1 
       Octanol/air (Koa) model:  0.0467 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =  67.9149 E-12 cm3/molecule-sec
      Half-Life =     0.157 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =     1.890 Hrs
   Ozone Reaction:
      OVERALL Ozone Rate Constant =     1.312500 E-17 cm3/molecule-sec
      Half-Life =     0.873 Days (at 7E11 mol/cm3)
      Half-Life =     20.955 Hrs
   Fraction sorbed to airborne particulates (phi): 1 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  36.36
      Log Koc:  1.561 

 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 = 0.424 (BCF = 2.656)
       log Kow used: 1.46 (expkow database)

 Volatilization from Water:
    Henry LC:  2.83E-010 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 3.917E+006  hours   (1.632E+005 days)
    Half-Life from Model Lake : 4.273E+007  hours   (1.78E+006 days)

 Removal In Wastewater Treatment:
    Total removal:               1.96  percent
    Total biodegradation:        0.09  percent
    Total sludge adsorption:     1.87  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       0.138           3.2          1000       
   Water     41.2            1.44e+003    1000       
   Soil      58.6            2.88e+003    1000       
   Sediment  0.103           1.3e+004     0          
     Persistence Time: 940 hr