Methane

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  • Identifiers

    CAS number
    74-82-8

    Molecular formula
    CH4

    SMILES
    C

    Safety labels

    Flammable
    Flammable

    Compressed Gas
    Compressed Gas

  • Odor profile

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    0.6

    pKa est.
    10.91 (weak base)

    Molecular weight
    16.043 g/mol

    Melting point expt.

    • -296 °F (USCG, 1999)
    • -296.5 °F (NTP, 1992)
    • -182.566 °C
    • -182.4 °C
    • -183 °C

    Boiling point

    • -258 °F at 760 mmHg (USCG, 1999)
    • -258.7 °F at 760 mmHg (NTP, 1992)
    • -161.50 °C
    • -161 °C

    Flash point

    • -108.14 ˚C est.
    • -306 °F (NTP, 1992)
    • -306 °F
    • -188 °C (-306 °F) - closed cup
    • Flammable gas

    Solubility expt.

    • 3.5 mL/100 mL at 63 °F (NTP, 1992)
    • In water, 22 mg/L at 25 °C
    • Slightly soluble in acetone; soluble in ethanol, ethyl ether, benzene, toluene, methanol
    • 0.91 mL in 1 g ether at 20 °C; 0.60 mL in 1 g ethyl alcohol at 20 °C
    • 0.022 mg/mL at 25 °C
    • Solubility in water, ml/100ml at 20 °C: 3.3

  • Synonyms

    • methane
    • Marsh gas
    • Methyl hydride
    • Fire Damp
    • Biogas
    • 74-82-8
    • R 50 (refrigerant)
    • methan
    • metano
    • tetrahydridocarbon
    • HSDB 167
    • Methane in gaseus state
    • UN1971
    • UN1972
    • BRN 1718732
    • OP0UW79H66
    • CH4
    • DTXSID8025545
    • CHEBI:16183
    • R 50
    • UNII-OP0UW79H66
    • Methane-12C
    • RefChem:6654
    • methane;tetrahydridocarbon
    • AC1L18XA
    • CHEMBL17564
    • DTXCID705545
    • CTK2H7747
    • AC1Q2825
    • AKOS005166816
    • C01438
    • 0CB689EE-132E-4559-A597-C79A40192203
    • 200-812-7
    • 02329_FLUKA
    • 14493-06-2
    • 150036-83-2
    • 295477_ALDRICH
    • 3B4-2254
    • 463035_ALDRICH
    • 490210_ALDRICH
    • 8006-14-2
    • AG-E-08601
    • AR-1A0383
    • AR-1A0497
    • Biodiesels
    • C5M
    • KST-1A1445
    • KST-1A1563
    • MolPort-018-618-244
    • Natural gas
    • MFCD00133992
    • Unalloyed steel
    • Alloy steel
    • C in Steel
    • C in Steel, chips
    • Carbon and Sulphur in Cast Iron
    • MFCD00144065
    • MFCD00146977
    • MFCD00211867
    • Methylidyne radical
    • EINECS 200-812-7
    • a methyl group
    • GO quantum dots
    • Gas, natural
    • Methane-d?
    • N-doped Grpahene
    • high purity SWNTs
    • N-doped MWCNTs
    • 74C
    • MWCNTs water paste
    • Flash-ignited MWNTs
    • Electrode pole pieces
    • Liquified natural gas
    • Synthetic natural gas
    • Methane [WHO-DD]
    • Acetylene carbon black
    • rGO-NH-Carboimidazole
    • MWNTs water suspension
    • C/S in Steel, chips
    • GO quantum dots powder
    • Nitrogen doped CMK-3
    • MWNTs DMSO suspension
    • PEG@GO
    • PEI@GO
    • MWCNTs water suspension
    • METHANE [HSDB]
    • SCHEMBL93
    • GO quantum dots(Powder)
    • METHANE [MI]
    • MWCNTs(long) 4-6nm
    • MWNTs(short) 4-6 nm
    • NanoIntegris Dielectic ink
    • SCHEMBL148
    • SCHEMBL777
    • SCHEMBL778
    • SCHEMBL849
    • GrapheitizedMWNT 8-15nm
    • MWCNTs(long) 5-15nm
    • GO quantum dots (solvent)
    • EC 200-812-7
    • Grapheitized MWNTs >50nm
    • Methane, >=99.0%
    • Customized MWNTs dispersion
    • GO quantum dots(20mg/ml)
    • Methane, analytical standard
    • MWNTs(short) 5-15 nm
    • MWNTs(short) 8-15 nm
    • CH2H2
    • CMK-3
    • CMK-8
    • MWCNTs(long) 20-30nm
    • MWCNTs(long) 8-15 nm
    • UNII-6GRV67N0U2
    • 4-01-00-00003 (Beilstein Handbook Reference)
    • MWNTs(short) 20-30 nm
    • MWNTs(short) 30-50 nm
    • Nanointegris ultrapure SWCNTs
    • UN 1971 (Salt/Mix)
    • UN 1972 (Salt/Mix)
    • Graphitized MWNTs 10-20nm
    • Low Purity Carboxylic SWCNTs
    • GO quantum dots(C: 1mg/ml)
    • Grapheitized MWNTs 20-30nm
    • Grapheitized MWNTs 30-50nm
    • Low purity Hydroxylate SWCNTs
    • METHANE (13C,D4)
    • MWNTs ethyl acetate suspension
    • 8006-14-2

  • Applications

    Methane (CAS 74-82-8) is a simple hydrocarbon widely used as a fuel and as a chemical feedstock for multiple industrial processes. Applications include: fuel for electricity generation, industrial heating, and residential cooking; feedstock for steam reforming to produce syngas (H2 and CO) used for methanol and ammonia synthesis; a source for methanol production from syngas; hydrogen supply for ammonia synthesis and related processes; and gas-to-liquids (GTL) technologies to convert syngas into liquids such as synthetic fuels.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 393.87
    methanol 478.85
    isopropanol 321.05
    water 2.11
    ethyl acetate 113.54
    n-propanol 310.15
    acetone 236.48
    n-butanol 296.65
    acetonitrile 199.22
    DMF 372.3
    toluene 45.35
    isobutanol 208.79
    1,4-dioxane 199.68
    methyl acetate 118.9
    THF 362.3
    2-butanone 154.73
    n-pentanol 146.91
    sec-butanol 262.76
    n-hexane 87.36
    ethylene glycol 123.43
    NMP 302.43
    cyclohexane 66.53
    DMSO 284.42
    n-butyl acetate 123.56
    n-octanol 97.12
    chloroform 367.0
    n-propyl acetate 69.18
    acetic acid 352.97
    dichloromethane 257.59
    cyclohexanone 194.3
    propylene glycol 172.08
    isopropyl acetate 60.89
    DMAc 184.71
    2-ethoxyethanol 119.69
    isopentanol 169.66
    n-heptane 60.72
    ethyl formate 108.02
    1,2-dichloroethane 141.41
    n-hexanol 233.06
    2-methoxyethanol 291.06
    isobutyl acetate 43.36
    tetrachloromethane 104.91
    n-pentyl acetate 76.75
    transcutol 179.74
    n-heptanol 109.26
    ethylbenzene 25.89
    MIBK 55.06
    2-propoxyethanol 197.2
    tert-butanol 296.21
    MTBE 145.45
    2-butoxyethanol 129.62
    propionic acid 237.07
    o-xylene 27.97
    formic acid 125.97
    diethyl ether 169.87
    m-xylene 28.52
    p-xylene 36.43
    chlorobenzene 77.79
    dimethyl carbonate 44.66
    n-octane 23.56
    formamide 122.74
    cyclopentanone 277.39
    2-pentanone 129.61
    anisole 50.95
    cyclopentyl methyl ether 139.93
    gamma-butyrolactone 294.19
    1-methoxy-2-propanol 196.87
    pyridine 173.24
    3-pentanone 87.18
    furfural 191.73
    n-dodecane 14.72
    diethylene glycol 124.38
    diisopropyl ether 41.65
    tert-amyl alcohol 236.79
    acetylacetone 86.37
    n-hexadecane 15.76
    acetophenone 43.69
    methyl propionate 99.57
    isopentyl acetate 91.87
    trichloroethylene 229.2
    n-nonanol 79.86
    cyclohexanol 170.59
    benzyl alcohol 56.12
    2-ethylhexanol 112.84
    isooctanol 73.6
    dipropyl ether 113.73
    1,2-dichlorobenzene 61.55
    ethyl lactate 40.41
    propylene carbonate 143.42
    n-methylformamide 202.57
    2-pentanol 175.71
    n-pentane 77.61
    1-propoxy-2-propanol 162.99
    1-methoxy-2-propyl acetate 69.23
    2-(2-methoxypropoxy) propanol 67.53
    mesitylene 19.77
    ε-caprolactone 148.38
    p-cymene 27.27
    epichlorohydrin 194.78
    1,1,1-trichloroethane 173.43
    2-aminoethanol 213.72
    morpholine-4-carbaldehyde 188.45
    sulfolane 296.17
    2,2,4-trimethylpentane 25.02
    2-methyltetrahydrofuran 251.07
    n-hexyl acetate 100.53
    isooctane 16.18
    2-(2-butoxyethoxy)ethanol 106.1
    sec-butyl acetate 40.87
    tert-butyl acetate 61.38
    decalin 19.79
    glycerin 168.21
    diglyme 150.67
    acrylic acid 214.64
    isopropyl myristate 41.35
    n-butyric acid 278.57
    acetyl acetate 62.16
    di(2-ethylhexyl) phthalate 41.77
    ethyl propionate 58.34
    nitromethane 258.73
    1,2-diethoxyethane 83.89
    benzonitrile 80.49
    trioctyl phosphate 37.79
    1-bromopropane 144.87
    gamma-valerolactone 234.31
    n-decanol 59.52
    triethyl phosphate 31.35
    4-methyl-2-pentanol 68.11
    propionitrile 178.15
    vinylene carbonate 116.24
    1,1,2-trichlorotrifluoroethane 184.38
    DMS 50.17
    cumene 19.2
    2-octanol 76.91
    2-hexanone 84.47
    octyl acetate 59.84
    limonene 51.96
    1,2-dimethoxyethane 158.57
    ethyl orthosilicate 32.57
    tributyl phosphate 39.73
    diacetone alcohol 88.96
    N,N-dimethylaniline 39.31
    acrylonitrile 190.93
    aniline 92.36
    1,3-propanediol 242.1
    bromobenzene 74.26
    dibromomethane 213.7
    1,1,2,2-tetrachloroethane 211.93
    2-methyl-cyclohexyl acetate 49.06
    tetrabutyl urea 51.01
    diisobutyl methanol 51.8
    2-phenylethanol 71.26
    styrene 36.6
    dioctyl adipate 50.22
    dimethyl sulfate 63.3
    ethyl butyrate 67.77
    methyl lactate 71.44
    butyl lactate 64.46
    diethyl carbonate 42.42
    propanediol butyl ether 115.26
    triethyl orthoformate 50.76
    p-tert-butyltoluene 30.52
    methyl 4-tert-butylbenzoate 59.72
    morpholine 258.24
    tert-butylamine 208.28
    n-dodecanol 46.48
    dimethoxymethane 135.4
    ethylene carbonate 101.85
    cyrene 56.1
    2-ethoxyethyl acetate 65.47
    2-ethylhexyl acetate 75.74
    1,2,4-trichlorobenzene 70.65
    4-methylpyridine 141.73
    dibutyl ether 84.31
    2,6-dimethyl-4-heptanol 51.8
    DEF 143.4
    dimethyl isosorbide 89.25
    tetrachloroethylene 159.11
    eugenol 62.26
    triacetin 57.89
    span 80 99.77
    1,4-butanediol 85.72
    1,1-dichloroethane 184.67
    2-methyl-1-pentanol 98.42
    methyl formate 120.91
    2-methyl-1-butanol 179.13
    n-decane 24.51
    butyronitrile 189.83
    3,7-dimethyl-1-octanol 70.16
    1-chlorooctane 57.73
    1-chlorotetradecane 25.15
    n-nonane 27.58
    undecane 18.13
    tert-butylcyclohexane 22.75
    cyclooctane 20.77
    cyclopentanol 247.81
    tetrahydropyran 236.31
    tert-amyl methyl ether 104.73
    2,5,8-trioxanonane 98.87
    1-hexene 144.69
    2-isopropoxyethanol 75.2
    2,2,2-trifluoroethanol 90.64
    methyl butyrate 86.57

    Scent© AI

1 4

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 No restriction Category 7A
Rinse-off products applied to the hair with some hand contact
 No restriction
Category 2
Products applied to the axillae
 No restriction Category 7B
Leave-on products applied to the hair with some hand contact
 No restriction
Category 3
Products applied to the face/body using fingertips
 No restriction Category 8
Products with significant anogenital exposure
 No restriction
Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
 No restriction
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 No restriction Category 10A
Household care products with mostly hand contact
 No restriction
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 No restriction Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 No restriction
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 No restriction Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 No restriction
Category 5D
Baby Creams, baby Oils and baby talc
 No restriction Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 No restriction
Category 6
Products with oral and lip exposure
 No restriction Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction