ChemSpider 2D Image | Disulfuric acid | H2O7S2

Disulfuric acid

  • Molecular FormulaH2O7S2
  • Average mass178.142 Da
  • Monoisotopic mass177.924194 Da
  • ChemSpider ID56433

More details:

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

231-976-8 [EINECS]
Acide disulfurique [French] [ACD/IUPAC Name]
Dischwefelsäure [German] [ACD/IUPAC Name]
Disulfuric acid [ACD/Index Name] [ACD/IUPAC Name]
7783-05-3 [RN]
7790-62-7 [RN]
ácido dissulfúrico [Portuguese]
disulfuric acid; μ-oxido-bis(hydroxidodioxidosulfur)

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

CHEBI:29211 [DBID]

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

Density: 2.5±0.1 g/cm3
Boiling Point:
Vapour Pressure:
Enthalpy of Vaporization:
Flash Point:
Index of Refraction: 1.596
Molar Refractivity: 24.5±0.4 cm3
#H bond acceptors: 7
#H bond donors: 2
#Freely Rotating Bonds: 2
#Rule of 5 Violations: 0
ACD/LogP: -1.19
ACD/LogD (pH 5.5):
ACD/BCF (pH 5.5):
ACD/KOC (pH 5.5):
ACD/LogD (pH 7.4):
ACD/BCF (pH 7.4):
ACD/KOC (pH 7.4):
Polar Surface Area: 135 Å2
Polarizability: 9.7±0.5 10-24cm3
Surface Tension: 149.5±3.0 dyne/cm
Molar Volume: 72.0±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) =  -4.77

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  718.15  (Adapted Stein & Brown method)
    Melting Pt (deg C):  314.50  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  2.34E-021  (Modified Grain method)
    Subcooled liquid VP: 4.2E-018 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):  1e+006
       log Kow used: -4.77 (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 :   7.67E-014  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  5.485E-028 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  -4.77  (KowWin est)
  Log Kaw used:  -11.504  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  6.734
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.6627
   Biowin2 (Non-Linear Model)     :   0.6176
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.8055  (weeks       )
   Biowin4 (Primary Survey Model) :   3.5907  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.1822
   Biowin6 (MITI Non-Linear Model):   0.0681
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.8361
 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):  5.6E-016 Pa (4.2E-018 mm Hg)
  Log Koa (Koawin est  ): 6.734
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  5.36E+009 
       Octanol/air (Koa) model:  1.33E-006 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  1 
       Mackay model           :  1 
       Octanol/air (Koa) model:  0.000106 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   0.2800 E-12 cm3/molecule-sec
      Half-Life =    38.200 Days (12-hr day; 1.5E6 OH/cm3)
   Ozone Reaction:
      No Ozone Reaction Estimation
   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    :  6.233
      Log Koc:  0.795 

 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: -4.77 (estimated)

 Volatilization from Water:
    Henry LC:  7.67E-014 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 1.019E+010  hours   (4.245E+008 days)
    Half-Life from Model Lake : 1.111E+011  hours   (4.631E+009 days)

 Removal In Wastewater Treatment:
    Total removal:               1.85  percent
    Total biodegradation:        0.09  percent
    Total sludge adsorption:     1.75  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       1.55            917          1000       
   Water     39.9            360          1000       
   Soil      58.5            720          1000       
   Sediment  0.0729          3.24e+003    0          
     Persistence Time: 527 hr


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