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Search term: methane (Found by approved synonym)

ChemSpider 2D Image | Methane | CH4


  • Molecular FormulaCH4
  • Average mass16.042 Da
  • Monoisotopic mass16.031300 Da
  • ChemSpider ID291

More details:

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

200-812-7 [EINECS]
74-82-8 [RN]
metan [Polish]
metano [Spanish]
methaan [Dutch]
Methan [German] [ACD/IUPAC Name]
Methane [ACD/Index Name] [ACD/IUPAC Name] [Wiki]
Méthane [French] [ACD/IUPAC Name]
methyl hydride
甲烷 [Chinese]

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

02329_FLUKA [DBID]
05105_FLUKA [DBID]
05110_FLUKA [DBID]
05112_FLUKA [DBID]
05113_FLUKA [DBID]
05117_FLUKA [DBID]
05120_FLUKA [DBID]
05123_FLUKA [DBID]
161551_SIAL [DBID]
  • Experimental Physico-chemical Properties
  • Miscellaneous
    • Appearance:

      colourless odourless gas Oxford University Chemical Safety Data (No longer updated) More details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

      Stable. Extremely flammable - note low flash point; mixtures with air constitutean explosion hazard. Reacts violently with interhalogens. Incompatible with strong oxidizing agents, halogens, interha logens,oxygen. Oxford University Chemical Safety Data (No longer updated) More details
    • Safety:

      CAUTION: May be harmful if swallowed Alfa Aesar 13844, 14389
      DANGER: FLAMMABLE, explosion hazard with air and ignition Alfa Aesar 20919
      Not known to be hazardous in this form Alfa Aesar 40830, 40831, 40832, 40833, 42107, 43199, 43200, 43201
      Safety glasses, good ventilation. Remove sources ofignition from the working area. Use a flashback arresteron cylinders of compressed gas. Oxford University Chemical Safety Data (No longer updated) More details
      WARNING: Irritates lungs, eyes, skin Alfa Aesar A16862, H31868
  • Gas Chromatography
    • Retention Index (Normal Alkane):

      100 (Column class: All column type... (show more) s; CAS no: 74828; Data type: Normal alkane RI value specified by scale definition; Authors: von Kovats, E., 206. Gas-chromatographische Charakterisierung organischer Verbindungen. Teil 1: Retentionsindices aliphatischer Halogenide, Alkohole, Aldehyde und Ketone, Helv. Chim. Acta, 41(7), 1958, 1915-1932.) NIST Spectra nist ri

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

Boiling Point: -164.0±7.0 °C at 760 mmHg
Vapour Pressure: 205285.6±0.1 mmHg at 25°C
Enthalpy of Vaporization: 8.2±0.0 kJ/mol
Flash Point: -228.3±11.7 °C
Index of Refraction:
Molar Refractivity:
#H bond acceptors: 0
#H bond donors: 0
#Freely Rotating Bonds: 0
#Rule of 5 Violations: 0
ACD/LogP: 1.09
ACD/LogD (pH 5.5): 1.02
ACD/BCF (pH 5.5): 3.49
ACD/KOC (pH 5.5): 85.12
ACD/LogD (pH 7.4): 1.02
ACD/BCF (pH 7.4): 3.49
ACD/KOC (pH 7.4): 85.12
Polar Surface Area: 0 Å2
Surface Tension:
Molar Volume:

Predicted data is generated using the US Environmental Protection Agency’s EPISuite™

 Log Octanol-Water Partition Coef (SRC):
    Log Kow (KOWWIN v1.67 estimate) =  0.78
    Log Kow (Exper. database match) =  1.09
       Exper. Ref:  Hansch,C et al. (1995)

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  -62.40  (Adapted Stein & Brown method)
    Melting Pt (deg C):  -152.93  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  5.31E+005  (Mean VP of Antoine & Grain methods)
    MP  (exp database):  -182.4 deg C
    BP  (exp database):  -161.5 deg C
    VP  (exp database):  4.66E+05 mm Hg at 25 deg C

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  2610
       log Kow used: 1.09 (expkow database)
       no-melting pt equation used
     Water Sol (Exper. database match) =  22 mg/L (25 deg C)
        Exper. Ref:  YALKOWSKY,SH & DANNENFELSER,RM (1992)

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  428.49 mg/L
    Wat Sol (Exper. database match) =  22.00
       Exper. Ref:  YALKOWSKY,SH & DANNENFELSER,RM (1992)

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   4.14E-001  atm-m3/mole
   Group Method:   6.58E-001  atm-m3/mole
   Exper Database: 6.58E-01  atm-m3/mole
 Henrys LC [VP/WSol estimate using EPI values]:  6.146E-003 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  1.09  (exp database)
  Log Kaw used:  1.430  (exp database)
      Log Koa (KOAWIN v1.10 estimate):  -0.340
      Log Koa (experimental database):  -0.380

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.7399
   Biowin2 (Non-Linear Model)     :   0.9416
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   3.1637  (weeks       )
   Biowin4 (Primary Survey Model) :   3.8246  (days        )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.6648
   Biowin6 (MITI Non-Linear Model):   0.8891
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.7565
 Ready Biodegradability Prediction:   YES

 Hydrocarbon Biodegradation (BioHCwin v1.01):
     LOG BioHC Half-Life (days) :   0.5033
     BioHC Half-Life (days)     :   3.1866

 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
  Vapor pressure (liquid/subcooled):  6.21E+007 Pa (4.66E+005 mm Hg)
  Log Koa (Exp database): -0.380
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  4.83E-014 
       Octanol/air (Koa) model:  1.02E-013 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  1.74E-012 
       Mackay model           :  3.86E-012 
       Octanol/air (Koa) model:  8.19E-012 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   0.0069 E-12 cm3/molecule-sec
      Half-Life =  1559.182 Days (12-hr day; 1.5E6 OH/cm3)
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 2.8E-012 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  4.203
      Log Koc:  0.624 

 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 = 0.139 (BCF = 1.378)
       log Kow used: 1.09 (expkow database)

 Volatilization from Water:
    Henry LC:  0.658 atm-m3/mole  (Henry experimental database)
    Half-Life from Model River:      2.093  hours
    Half-Life from Model Lake :      2.093  hours

 Removal In Wastewater Treatment (recommended maximum 95%):
    Total removal:              99.61  percent
    Total biodegradation:        0.02  percent
    Total sludge adsorption:     0.28  percent
    Total to Air:               99.31  percent
      (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
           Mass Amount    Half-Life    Emissions
            (percent)        (hr)       (kg/hr)
   Air       56.8            3.74e+004    1000       
   Water     42.6            360          1000       
   Soil      0.502           720          1000       
   Sediment  0.0871          3.24e+003    0          
     Persistence Time: 144 hr


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