Carbonic acid CH2O3 structure – Flashcards

Flashcard maker : Linda Lynch

Molecular Formula CH2O3
Average mass 62.025 Da
Density 1.7±0.1 g/cm3
Boiling Point 333.6±25.0 °C at 760 mmHg
Flash Point 169.8±19.7 °C
Molar Refractivity 9.8±0.3 cm3
Polarizability 3.9±0.5 10-24cm3
Surface Tension 78.0±3.0 dyne/cm
Molar Volume 37.2±3.0 cm3
  • Experimental data
  • Predicted – ACD/Labs
  • Predicted – EPISuite
  • Predicted – ChemAxon
  • 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      colourless aqueous solution Oxford University Chemical Safety Data (No longer updated) More details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 Oxford University Chemical Safety Data (No longer updated) More details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 Oxford University Chemical Safety Data (No longer updated) More details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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