PLANNED MAINTENANCE

There will be scheduled maintenance work beginning on Wednesday 26th February 2020 from 11:00 AM through to 12.00 PM (GMT).

During this time, you may not be able to log into ChemSpider. We apologise for any inconvenience this might cause and thank you for your patience.


ChemSpider 2D Image | Pyrophosphoric Acid | H4O7P2

Pyrophosphoric Acid

  • Molecular FormulaH4O7P2
  • Average mass177.975 Da
  • Monoisotopic mass177.943222 Da
  • ChemSpider ID996

More details:



Featured data source



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

219-574-0 [EINECS]
2466-09-3 [RN]
Acide diphosphorique [French] [ACD/IUPAC Name]
Diphosphoric acid [ACD/Index Name] [ACD/IUPAC Name]
Diphosphorsäure [German] [ACD/IUPAC Name]
hydrogen pyrophosphate
MFCD00011343 [MDL number]
phosphoric anhydride
Pyrophosphic acid
Pyrophosphoric Acid [Wiki]
More...

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

4E862E7GRQ [DBID]
JL6672500 [DBID]
433314_ALDRICH [DBID]
60352_RIEDEL [DBID]
83210_FLUKA [DBID]
AIDS000493 [DBID]
AIDS-000493 [DBID]
C00013 [DBID]
CHEBI:29888 [DBID]
NCGC00013687 [DBID]
More...

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

Density: 2.4±0.1 g/cm3
Boiling Point:
Vapour Pressure:
Enthalpy of Vaporization:
Flash Point:
Index of Refraction: 1.560
Molar Refractivity: 23.7±0.3 cm3
#H bond acceptors: 7
#H bond donors: 4
#Freely Rotating Bonds: 2
#Rule of 5 Violations: 0
ACD/LogP: -3.42
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: 144 Å2
Polarizability: 9.4±0.5 10-24cm3
Surface Tension: 166.4±3.0 dyne/cm
Molar Volume: 73.2±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) =  -1.74

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  480.00  (Adapted Stein & Brown method)
    Melting Pt (deg C):  90.27  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  4.05E-011  (Modified Grain method)
    MP  (exp database):  61 deg C
    Subcooled liquid VP: 8.76E-011 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: -1.74 (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 :   6.86E-021  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  9.484E-018 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  -1.74  (KowWin est)
  Log Kaw used:  -18.552  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  16.812
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.6628
   Biowin2 (Non-Linear Model)     :   0.6181
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.8059  (weeks       )
   Biowin4 (Primary Survey Model) :   3.5910  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.1827
   Biowin6 (MITI Non-Linear Model):   0.0684
 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):  1.17E-008 Pa (8.76E-011 mm Hg)
  Log Koa (Koawin est  ): 16.812
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  257 
       Octanol/air (Koa) model:  1.59E+004 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  1 
       Mackay model           :  1 
       Octanol/air (Koa) model:  1 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   0.5600 E-12 cm3/molecule-sec
      Half-Life =    19.100 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    :  7.883
      Log Koc:  0.897 

 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: -1.74 (estimated)

 Volatilization from Water:
    Henry LC:  6.86E-021 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 1.139E+017  hours   (4.744E+015 days)
    Half-Life from Model Lake : 1.242E+018  hours   (5.176E+016 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       8.13e-010       458          1000       
   Water     39              360          1000       
   Soil      60.9            720          1000       
   Sediment  0.0713          3.24e+003    0          
     Persistence Time: 579 hr




                    

Click to predict properties on the Chemicalize site






Advertisement