ChemSpider 2D Image | Hydrazine | H4N2


  • Molecular FormulaH4N2
  • Average mass32.045 Da
  • Monoisotopic mass32.037449 Da
  • ChemSpider ID8960

More details:

Featured data source

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

302-01-2 [RN]
H2NNH2 [Formula]
Hidrazina [Spanish]
Hydrazin [German] [ACD/IUPAC Name]
Hydrazine [ACD/Index Name] [ACD/IUPAC Name] [Wiki]
Hydrazine [French] [ACD/Index Name] [ACD/IUPAC Name]
Hydrazyna [Polish]
N2H4 [Formula]
聯氨 [Chinese]

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

215155_SIAL [DBID]
C05361 [DBID]
CHEBI:15571 [DBID]
NSC2122 [DBID]
RCRA waste no. U133 [DBID]
RCRA waste number U133 [DBID]

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

Density: 0.9±0.1 g/cm3
Boiling Point: 113.5±9.0 °C at 760 mmHg
Vapour Pressure: 20.7±0.2 mmHg at 25°C
Enthalpy of Vaporization: 41.8±0.0 kJ/mol
Flash Point:
Index of Refraction: 1.422
Molar Refractivity: 9.1±0.3 cm3
#H bond acceptors: 2
#H bond donors: 4
#Freely Rotating Bonds: 1
#Rule of 5 Violations: 0
ACD/LogP: -1.20
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: 52 Å2
Polarizability: 3.6±0.5 10-24cm3
Surface Tension: 39.9±3.0 dyne/cm
Molar Volume: 35.9±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) =  -1.47
    Log Kow (Exper. database match) =  -2.07
       Exper. Ref:  Hansch,C et al. (1995)

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  499.25  (Adapted Stein & Brown method)
    Melting Pt (deg C):  198.90  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  20.8  (Mean VP of Antoine & Grain methods)
    MP  (exp database):  2 deg C
    BP  (exp database):  113.5 deg C
    VP  (exp database):  1.44E+01 mm Hg at 25 deg C

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  1e+006
       log Kow used: -2.07 (expkow database)
       no-melting pt equation used
     Water Sol (Exper. database match) =  1e+006 mg/L ( deg C)
        Exper. Ref:  AMOORE,JE & HAUTALA,E (1983)

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  1e+006 mg/L
    Wat Sol (Exper. database match) =  1000000.00
       Exper. Ref:  AMOORE,JE & HAUTALA,E (1983)

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   1.44E-008  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  8.772E-007 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  -2.07  (exp database)
  Log Kaw used:  -6.230  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  4.160
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.7323
   Biowin2 (Non-Linear Model)     :   0.9278
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   3.1284  (weeks       )
   Biowin4 (Primary Survey Model) :   3.8015  (days        )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.2438
   Biowin6 (MITI Non-Linear Model):   0.0000
 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):  1.92E+003 Pa (14.4 mm Hg)
  Log Koa (Koawin est  ): 4.160
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  1.56E-009 
       Octanol/air (Koa) model:  3.55E-009 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  5.64E-008 
       Mackay model           :  1.25E-007 
       Octanol/air (Koa) model:  2.84E-007 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   0.0000 E-12 cm3/molecule-sec
      Half-Life =   -------
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 9.07E-008 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  14.3
      Log Koc:  1.155 

 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: -2.07 (expkow database)

 Volatilization from Water:
    Henry LC:  1.44E-008 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 2.302E+004  hours   (959.1 days)
    Half-Life from Model Lake : 2.512E+005  hours   (1.046E+004 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       0.332           1e+005       1000       
   Water     39.2            360          1000       
   Soil      60.3            720          1000       
   Sediment  0.0718          3.24e+003    0          
     Persistence Time: 567 hr


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