ChemSpider 2D Image | 2,7-Dihydroxy-4H-chromen-4-one | C9H6O4


  • Molecular FormulaC9H6O4
  • Average mass178.141 Da
  • Monoisotopic mass178.026611 Da
  • ChemSpider ID4522586

More details:

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

2,7-Dihydroxy-4H-chromen-4-on [German] [ACD/IUPAC Name]
2,7-Dihydroxy-4H-chromen-4-one [ACD/IUPAC Name]
2,7-Dihydroxy-4H-chromén-4-one [French] [ACD/IUPAC Name]
4H-1-Benzopyran-4-one, 2,7-dihydroxy- [ACD/Index Name]
1983-81-9 [RN]
2H-1-Benzopyran-2-one, 4, 7-dihydroxy-
coumarin, 4,7-dihydroxy-

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

AIDS058181 [DBID]
AIDS-058181 [DBID]
NSC136214 [DBID]
ZINC00241367 [DBID]

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

Density: 1.6±0.1 g/cm3
Boiling Point: 390.0±42.0 °C at 760 mmHg
Vapour Pressure: 0.0±0.9 mmHg at 25°C
Enthalpy of Vaporization: 67.4±3.0 kJ/mol
Flash Point: 166.5±21.4 °C
Index of Refraction: 1.711
Molar Refractivity: 43.2±0.3 cm3
#H bond acceptors: 4
#H bond donors: 2
#Freely Rotating Bonds: 0
#Rule of 5 Violations: 0
ACD/LogP: 0.58
ACD/LogD (pH 5.5): -0.25
ACD/BCF (pH 5.5): 1.00
ACD/KOC (pH 5.5): 5.56
ACD/LogD (pH 7.4): -2.46
ACD/BCF (pH 7.4): 1.00
ACD/KOC (pH 7.4): 1.00
Polar Surface Area: 67 Å2
Polarizability: 17.1±0.5 10-24cm3
Surface Tension: 83.6±3.0 dyne/cm
Molar Volume: 110.5±3.0 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) =  0.38

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  362.52  (Adapted Stein & Brown method)
    Melting Pt (deg C):  129.66  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  2.04E-007  (Modified Grain method)
    Subcooled liquid VP: 2.28E-006 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):  1.016e+005
       log Kow used: 0.38 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  12459 mg/L

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   2.44E-014  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  4.707E-013 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  0.38  (KowWin est)
  Log Kaw used:  -12.001  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  12.381
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   1.0760
   Biowin2 (Non-Linear Model)     :   0.9866
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.9412  (weeks       )
   Biowin4 (Primary Survey Model) :   3.8148  (days        )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.7513
   Biowin6 (MITI Non-Linear Model):   0.8054
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.4759
 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):  0.000304 Pa (2.28E-006 mm Hg)
  Log Koa (Koawin est  ): 12.381
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  0.00987 
       Octanol/air (Koa) model:  0.59 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  0.263 
       Mackay model           :  0.441 
       Octanol/air (Koa) model:  0.979 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant = 230.6950 E-12 cm3/molecule-sec
      Half-Life =     0.046 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =     0.556 Hrs
   Ozone Reaction:
      OVERALL Ozone Rate Constant =     0.875000 E-17 cm3/molecule-sec
      Half-Life =     1.310 Days (at 7E11 mol/cm3)
      Half-Life =     31.433 Hrs
   Reaction With Nitrate Radicals May Be Important!
   Fraction sorbed to airborne particulates (phi): 0.352 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  10
      Log Koc:  1.000 

 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: 0.38 (estimated)

 Volatilization from Water:
    Henry LC:  2.44E-014 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 3.203E+010  hours   (1.334E+009 days)
    Half-Life from Model Lake : 3.494E+011  hours   (1.456E+010 days)

 Removal In Wastewater Treatment:
    Total removal:               1.86  percent
    Total biodegradation:        0.09  percent
    Total sludge adsorption:     1.76  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       7.98e-007       1.07         1000       
   Water     37.8            360          1000       
   Soil      62.2            720          1000       
   Sediment  0.0706          3.24e+003    0          
     Persistence Time: 587 hr


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