ChemSpider 2D Image | Carbonic acid | CH2O3

Carbonic acid

  • Molecular FormulaCH2O3
  • Average mass62.025 Da
  • Monoisotopic mass62.000393 Da
  • ChemSpider ID747

More details:

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

463-79-6 [RN]
acid of air
Acide carbonique [French] [ACD/IUPAC Name]
Aerial acid
Carbonate, Hydrogen
Carbonic acid [ACD/IUPAC Name] [Wiki]
Dihydrogen carbonate
H2CO3 [Formula]

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

AIDS156087 [DBID]
AIDS-156087 [DBID]
C.I. 77099 [DBID]
C.I. 77353 [DBID]
C.I. 77713 [DBID]
C.I. 77837 [DBID]
C01353 [DBID]
CHEBI:28976 [DBID]
CP 1546761 [DBID]
LS-2398 [DBID]
  • Miscellaneous
    • Appearance:

      colourless aqueous solution Oxford University Chemical Safety Data (No longer updated) More details
    • Stability:

      Cannot be isolated as a pure liquid or solid, since theproducts of its decomposition, carbon dioxide and water, aremuch more stable than the acid. Oxford University Chemical Safety Data (No longer updated) More details
    • Safety:

      None. Oxford University Chemical Safety Data (No longer updated) More details

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

Density: 1.7±0.1 g/cm3
Boiling Point: 333.6±25.0 °C at 760 mmHg
Vapour Pressure: 0.0±1.5 mmHg at 25°C
Enthalpy of Vaporization: 63.4±6.0 kJ/mol
Flash Point: 169.8±19.7 °C
Index of Refraction: 1.439
Molar Refractivity: 9.8±0.3 cm3
#H bond acceptors: 3
#H bond donors: 2
#Freely Rotating Bonds: 0
#Rule of 5 Violations: 0
ACD/LogP: -0.81
ACD/LogD (pH 5.5): -2.08
ACD/BCF (pH 5.5): 1.00
ACD/KOC (pH 5.5): 1.00
ACD/LogD (pH 7.4): -3.87
ACD/BCF (pH 7.4): 1.00
ACD/KOC (pH 7.4): 1.00
Polar Surface Area: 58 Å2
Polarizability: 3.9±0.5 10-24cm3
Surface Tension: 78.0±3.0 dyne/cm
Molar Volume: 37.2±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) =  -0.46

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  246.91  (Adapted Stein & Brown method)
    Melting Pt (deg C):  62.97  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  0.0138  (Modified Grain method)
    Subcooled liquid VP: 0.0312 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):  8.42e+005
       log Kow used: -0.46 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  1e+006 mg/L

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   6.05E-009  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  1.338E-009 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  -0.46  (KowWin est)
  Log Kaw used:  -6.607  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  6.147
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.7180
   Biowin2 (Non-Linear Model)     :   0.8936
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   3.0621  (weeks       )
   Biowin4 (Primary Survey Model) :   3.7582  (days        )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.5276
   Biowin6 (MITI Non-Linear Model):   0.6759
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.8361
 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):  4.16 Pa (0.0312 mm Hg)
  Log Koa (Koawin est  ): 6.147
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  7.21E-007 
       Octanol/air (Koa) model:  3.44E-007 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  2.6E-005 
       Mackay model           :  5.77E-005 
       Octanol/air (Koa) model:  2.75E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   1.0400 E-12 cm3/molecule-sec
      Half-Life =    10.285 Days (12-hr day; 1.5E6 OH/cm3)
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 4.19E-005 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  1
      Log Koc:  0.000 

 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: -0.46 (estimated)

 Volatilization from Water:
    Henry LC:  6.05E-009 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 7.622E+004  hours   (3176 days)
    Half-Life from Model Lake : 8.315E+005  hours   (3.465E+004 days)

 Removal In Wastewater Treatment:
    Total removal:               1.85  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       0.141           247          1000       
   Water     39              360          1000       
   Soil      60.8            720          1000       
   Sediment  0.0715          3.24e+003    0          
     Persistence Time: 574 hr


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