ChemSpider 2D Image | Pregna-4,20-dien-3,6-dione | C21H28O2

Pregna-4,20-dien-3,6-dione

  • Molecular FormulaC21H28O2
  • Average mass312.446 Da
  • Monoisotopic mass312.208923 Da
  • ChemSpider ID21375166
  • defined stereocentres - 6 of 6 defined stereocentres


More details:






Validated by Experts, Validated by Users, Non-Validated, Removed by Users

Pregna-4,20-dien-3,6-dion [German] [ACD/IUPAC Name]
Pregna-4,20-dien-3,6-dione
Pregna-4,20-diene-3,6-dione [ACD/Index Name] [ACD/IUPAC Name]
Prégna-4,20-diène-3,6-dione [French] [ACD/IUPAC Name]

Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module

Density: 1.1±0.1 g/cm3
Boiling Point: 434.1±45.0 °C at 760 mmHg
Vapour Pressure: 0.0±1.0 mmHg at 25°C
Enthalpy of Vaporization: 69.0±3.0 kJ/mol
Flash Point: 162.1±25.7 °C
Index of Refraction: 1.551
Molar Refractivity: 90.7±0.4 cm3
#H bond acceptors: 2
#H bond donors: 0
#Freely Rotating Bonds: 1
#Rule of 5 Violations: 0
ACD/LogP: 4.29
ACD/LogD (pH 5.5): 4.07
ACD/BCF (pH 5.5): 726.30
ACD/KOC (pH 5.5): 3886.76
ACD/LogD (pH 7.4): 4.07
ACD/BCF (pH 7.4): 726.30
ACD/KOC (pH 7.4): 3886.76
Polar Surface Area: 34 Å2
Polarizability: 36.0±0.5 10-24cm3
Surface Tension: 41.4±5.0 dyne/cm
Molar Volume: 284.2±5.0 cm3

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

                        
 Log Octanol-Water Partition Coef (SRC):
    Log Kow (KOWWIN v1.67 estimate) =  5.55

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  405.39  (Adapted Stein & Brown method)
    Melting Pt (deg C):  157.38  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  6.54E-007  (Modified Grain method)
    Subcooled liquid VP: 1.48E-005 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):  0.1902
       log Kow used: 5.55 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  0.53935 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 :   2.58E-008  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  1.414E-006 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  5.55  (KowWin est)
  Log Kaw used:  -5.977  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  11.527
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.2446
   Biowin2 (Non-Linear Model)     :   0.0031
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.0395  (months      )
   Biowin4 (Primary Survey Model) :   3.0456  (weeks       )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.3667
   Biowin6 (MITI Non-Linear Model):   0.0607
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model): -1.7517
 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):  0.00197 Pa (1.48E-005 mm Hg)
  Log Koa (Koawin est  ): 11.527
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  0.00152 
       Octanol/air (Koa) model:  0.0826 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  0.0521 
       Mackay model           :  0.108 
       Octanol/air (Koa) model:  0.869 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant = 127.1075 E-12 cm3/molecule-sec
      Half-Life =     0.084 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =     1.010 Hrs
   Ozone Reaction:
      OVERALL Ozone Rate Constant =     1.375000 E-17 cm3/molecule-sec
      Half-Life =     0.833 Days (at 7E11 mol/cm3)
      Half-Life =     20.003 Hrs
   Fraction sorbed to airborne particulates (phi): 0.0802 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  8367
      Log Koc:  3.923 

 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 = 3.571 (BCF = 3723)
       log Kow used: 5.55 (estimated)

 Volatilization from Water:
    Henry LC:  2.58E-008 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 4.012E+004  hours   (1671 days)
    Half-Life from Model Lake : 4.378E+005  hours   (1.824E+004 days)

 Removal In Wastewater Treatment:
    Total removal:              88.88  percent
    Total biodegradation:        0.75  percent
    Total sludge adsorption:    88.13  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       0.0212          1.83         1000       
   Water     4.81            1.44e+003    1000       
   Soil      49.9            2.88e+003    1000       
   Sediment  45.2            1.3e+004     0          
     Persistence Time: 3.26e+003 hr




                    

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