Methanol

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  • Identifiers

    CAS number
    67-56-1

    Molecular formula
    CH4O

    SMILES
    CO

    Safety labels

    Flammable
    Flammable

    Acute Toxic
    Acute Toxic

    Health Hazard
    Health

  • Odor profile

    Alcoholic 65.97%
    Ethereal 61.99%
    Fermented 45.92%
    Sweet 44.42%
    Solvent 43.87%
    Winey 34.45%
    Odorless 30.87%
    Musty 30.17%
    Pungent 28.39%
    Gassy 27.64%

    Scent© AI

    Odor threshold

    • Odor Threshold Low: 4.2 [mmHg]. Odor Threshold High: 5960.0 [mmHg]. Detection odor threshold from AIHA (mean = 160 ppm)
    • The air odor threshold for methanol has been reported as 100 ppm. A level of 2,000 ppm ... is barely detectable.
    • Low threshold= 13.1150 mg/cu m; High threshold= 26840 mg/cu m; Irritating concn= 22875 mg/cu m.

  • Properties

    XLogP3-AA
    -0.5

    pKa est.
    8.88 (weak base)

    Molecular weight
    32.042 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Melting point expt.

    • -144 °F (NTP, 1992)
    • -97.8 °C
    • -97.6 °C
    • -98 °C
    • -144 °F

    Boiling point

    • 148.3 °F at 760 mmHg (NTP, 1992)
    • 64.7 °C at 760 mm Hg
    • 64.00 to 65.00 °C. @ 760.00 mm Hg
    • 65 °C
    • 147 °F

    Flash point est.
    7.06 ˚C

    Flash point expt.

    • 52 °F (NTP, 1992)
    • 52 °F (NFPA, 2010)
    • 54 °F
    • 9.7 °C (49.5 °F) - closed cup
    • 15.6 °C (open cup) /from table/
    • 52 °F (11 °C) (closed cup)
    • 9 °C c.c.
    • 52 °F

    Solubility expt.

    • greater than or equal to 100 mg/mL at 70 °F (NTP, 1992)
    • Miscible with water at 25 °C
    • Miscible with water at 20 °C
    • Miscible with ethanol, ether, benzene, most organic solvents and ketones
    • Soluble in acetone, chloroform
    • 1000 mg/mL at 25 °C
    • Solubility in water: miscible
    • Miscible

  • Synonyms

    • methanol
    • methyl alcohol
    • 67-56-1
    • wood alcohol
    • carbinol
    • Wood naphtha
    • Methylol
    • Methyl hydroxide
    • Methylalkohol
    • Monohydroxymethane
    • Alcohol, methyl
    • Alcool methylique
    • MeOH
    • Methyl hydrate
    • CH3OH
    • Metanolo
    • Alcool metilico
    • Metylowy alkohol
    • Freers Elm Arrester
    • Surflo-B17
    • Rcra waste number U154
    • Hydroxymethane
    • Wilbur-Ellis Smut-Guard
    • Metanol
    • Coat-B1400
    • Caswell No. 552
    • Metanol [Spanish]
    • Metanolo [Italian]
    • Alcohol,methyl
    • HSDB 93
    • Methylalkohol [German]
    • X-Cide 402 Industrial Bactericide
    • MetOH
    • NSC 85232
    • CCRIS 2301
    • Alcool metilico [Italian]
    • Metylowy alkohol [Polish]
    • Alcool methylique [French]
    • AI3-00409
    • Methyl alcohol [NF]
    • UN1230
    • CHEBI:17790
    • Pyro alcohol
    • Methanol cluster
    • RCRA waste no. U154
    • EINECS 200-659-6
    • UNII-Y4S76JWI15
    • NSC-85232
    • EPA Pesticide Chemical Code 053801
    • Y4S76JWI15
    • DTXSID2021731
    • MFCD00004595
    • 170082-17-4
    • DTXCID801731
    • METHYL ALCOHOL (METHANOL)
    • EC 200-659-6
    • Methanol, anhydrous
    • NSC85232
    • Methyl alcohol (NF)
    • NCGC00091172-01
    • Methanol; Methyl alcohol
    • METHANOL (D2)
    • METHYL ALCOHOL (MART.)
    • METHYL ALCOHOL [MART.]
    • CH4O
    • Methanol, for HPLC, >=99.9%
    • Methanol, ACS reagent, >=99.8%
    • Methanol, or methyl alcohol [UN1230] [Flammable liquid, Poison]
    • Alcohol, Wood
    • CAS-67-56-1
    • ACETONE IMPURITY A (EP IMPURITY)
    • ACETONE IMPURITY A [EP IMPURITY]
    • MOH
    • Methylalcohol
    • methly alcohol
    • Primary alcohol
    • methanol-
    • Wood
    • Manhattan spirits
    • Secondary alcohol
    • secondary alcohols
    • a primary alcohol
    • Methanol LC-MS
    • a secondary alcohol
    • Methanol, for HPLC
    • Methanol-[17O]
    • Methanol, ACS Grade
    • Methanol, HPLC grade
    • Methanol, LCMS grade
    • METHANOL [MI]
    • methanol (methyl alcohol)
    • Methanol, Histology Grade
    • bmse000294
    • Epitope ID:116865
    • METHANOL [USP-RS]
    • METHANOL [WHO-DD]
    • R-CHOH-R'
    • Methanol, or methyl alcohol
    • METHYL ALCOHOL [II]
    • Methanol, LR, >=99%
    • Methanol, SAJ special grade
    • Methanol, analytical standard
    • Methyl alcohol (DOT:OSHA)
    • METHYL ALCOHOL [FCC]
    • WLN: Q1
    • Methanol HPLC Gradient Grade
    • Methanol, Environmental Grade
    • CHEMBL14688
    • Methanol [for HPLC Solvent]
    • METHYL ALCOHOL [HSDB]
    • ALCOHOL,METHYL [VANDF]
    • Methanol, anhydrous, 99.8%
    • Methanol, p.a., 99.8%
    • Methanol, p.a., 99.9%
    • METHANOL [EP MONOGRAPH]
    • Methanol, AR, >=99.5%
    • METHYL ALCOHOL [USP-RS]
    • CHEBI:15734
    • CHEBI:35681
    • Methanol, NMR reference standard
    • Methanol, ultrapure, HPLC Grade
    • MSK6706
    • Methanol, 99.8%, ACS reagent
    • Methanol, anhydrous, >=99.5%
    • Methanol, low water for titration
    • Methanol, Absolute - Acetone free
    • Methanol, low benzene, HPLC grade
    • FAA77005

  • Applications

    Methanol (CAS 67-56-1) is a versatile solvent and cornerstone feedstock used to make formaldehyde, acetic acid, MTBE/TAME, dimethyl ether (DME), methyl methacrylate, methylamines, methyl chloride, and downstream resins/adhesives such as urea-formaldehyde and phenol-formaldehyde, as well as engineering plastic POM via formaldehyde; it serves as a fuel and fuel component (gasoline blending, racing fuel, direct methanol fuel cells), a marine fuel and in MTO/MTG routes to olefins/gasoline; acts as the alcohol reagent for biodiesel transesterification; is used as an antifreeze and gas-hydrate inhibitor for pipelines, a de-icer, windshield washer fluid, and ethanol denaturant; functions as an extraction/processing solvent in pharmaceuticals, paints and inks, and biotech; as a mobile phase in chromatography; as a carbon source for wastewater denitrification; as a hydrogen carrier and precursor in CO2 capture and utilization schemes; and is increasingly applied in power-to-methanol processes and clean energy supply chains.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 185.2
    methanol 592.9
    isopropanol 49.28
    water 317.66
    ethyl acetate 6.97
    n-propanol 87.03
    acetone 10.41
    n-butanol 51.31
    acetonitrile 14.81
    DMF 115.27
    toluene 0.43
    isobutanol 33.15
    1,4-dioxane 19.26
    methyl acetate 10.66
    THF 19.23
    2-butanone 5.73
    n-pentanol 15.82
    sec-butanol 26.07
    n-hexane 0.41
    ethylene glycol 447.68
    NMP 103.64
    cyclohexane 1.15
    DMSO 213.76
    n-butyl acetate 6.78
    n-octanol 5.5
    chloroform 19.49
    n-propyl acetate 3.88
    acetic acid 545.52
    dichloromethane 25.81
    cyclohexanone 15.06
    propylene glycol 172.06
    isopropyl acetate 2.42
    DMAc 39.49
    2-ethoxyethanol 53.01
    isopentanol 17.3
    n-heptane 1.12
    ethyl formate 26.86
    1,2-dichloroethane 13.59
    n-hexanol 15.39
    2-methoxyethanol 206.73
    isobutyl acetate 1.55
    tetrachloromethane 6.71
    n-pentyl acetate 3.94
    transcutol 60.63
    n-heptanol 8.14
    ethylbenzene 0.32
    MIBK 1.34
    2-propoxyethanol 42.43
    tert-butanol 25.94
    MTBE 2.34
    2-butoxyethanol 26.3
    propionic acid 146.46
    o-xylene 0.52
    formic acid 1238.71
    diethyl ether 3.56
    m-xylene 0.34
    p-xylene 0.46
    chlorobenzene 2.46
    dimethyl carbonate 5.44
    n-octane 0.33
    formamide 697.47
    cyclopentanone 20.04
    2-pentanone 3.64
    anisole 1.75
    cyclopentyl methyl ether 5.02
    gamma-butyrolactone 54.39
    1-methoxy-2-propanol 57.74
    pyridine 16.72
    3-pentanone 2.56
    furfural 84.98
    n-dodecane 0.25
    diethylene glycol 109.2
    diisopropyl ether 0.55
    tert-amyl alcohol 16.45
    acetylacetone 4.71
    n-hexadecane 0.24
    acetophenone 3.0
    methyl propionate 8.59
    isopentyl acetate 4.26
    trichloroethylene 21.31
    n-nonanol 4.36
    cyclohexanol 23.74
    benzyl alcohol 8.42
    2-ethylhexanol 5.82
    isooctanol 5.1
    dipropyl ether 3.46
    1,2-dichlorobenzene 3.8
    ethyl lactate 9.9
    propylene carbonate 25.3
    n-methylformamide 193.98
    2-pentanol 11.48
    n-pentane 0.79
    1-propoxy-2-propanol 22.0
    1-methoxy-2-propyl acetate 6.76
    2-(2-methoxypropoxy) propanol 13.72
    mesitylene 0.31
    ε-caprolactone 22.03
    p-cymene 1.08
    epichlorohydrin 28.07
    1,1,1-trichloroethane 3.99
    2-aminoethanol 372.78
    morpholine-4-carbaldehyde 78.77
    sulfolane 101.68
    2,2,4-trimethylpentane 0.33
    2-methyltetrahydrofuran 10.27
    n-hexyl acetate 4.67
    isooctane 0.18
    2-(2-butoxyethoxy)ethanol 24.39
    sec-butyl acetate 1.41
    tert-butyl acetate 1.94
    decalin 0.3
    glycerin 339.06
    diglyme 36.03
    acrylic acid 220.56
    isopropyl myristate 1.49
    n-butyric acid 98.49
    acetyl acetate 5.85
    di(2-ethylhexyl) phthalate 4.71
    ethyl propionate 3.12
    nitromethane 176.64
    1,2-diethoxyethane 4.83
    benzonitrile 6.96
    trioctyl phosphate 3.97
    1-bromopropane 3.94
    gamma-valerolactone 53.36
    n-decanol 3.07
    triethyl phosphate 4.41
    4-methyl-2-pentanol 3.27
    propionitrile 11.61
    vinylene carbonate 34.07
    1,1,2-trichlorotrifluoroethane 110.18
    DMS 5.02
    cumene 0.44
    2-octanol 3.28
    2-hexanone 1.98
    octyl acetate 2.74
    limonene 1.67
    1,2-dimethoxyethane 23.21
    ethyl orthosilicate 3.85
    tributyl phosphate 4.49
    diacetone alcohol 8.69
    N,N-dimethylaniline 2.01
    acrylonitrile 28.77
    aniline 7.79
    1,3-propanediol 281.55
    bromobenzene 1.36
    dibromomethane 12.63
    1,1,2,2-tetrachloroethane 18.24
    2-methyl-cyclohexyl acetate 3.89
    tetrabutyl urea 6.14
    diisobutyl methanol 2.54
    2-phenylethanol 7.94
    styrene 0.53
    dioctyl adipate 3.79
    dimethyl sulfate 15.68
    ethyl butyrate 4.9
    methyl lactate 23.8
    butyl lactate 10.54
    diethyl carbonate 4.12
    propanediol butyl ether 29.19
    triethyl orthoformate 4.67
    p-tert-butyltoluene 0.98
    methyl 4-tert-butylbenzoate 6.7
    morpholine 40.84
    tert-butylamine 11.19
    n-dodecanol 2.32
    dimethoxymethane 17.5
    ethylene carbonate 21.66
    cyrene 18.79
    2-ethoxyethyl acetate 5.88
    2-ethylhexyl acetate 3.19
    1,2,4-trichlorobenzene 4.84
    4-methylpyridine 6.72
    dibutyl ether 1.88
    2,6-dimethyl-4-heptanol 2.54
    DEF 15.75
    dimethyl isosorbide 17.95
    tetrachloroethylene 24.33
    eugenol 12.25
    triacetin 6.3
    span 80 20.55
    1,4-butanediol 75.94
    1,1-dichloroethane 4.8
    2-methyl-1-pentanol 7.01
    methyl formate 80.09
    2-methyl-1-butanol 20.67
    n-decane 0.34
    butyronitrile 10.77
    3,7-dimethyl-1-octanol 3.56
    1-chlorooctane 1.23
    1-chlorotetradecane 0.54
    n-nonane 0.34
    undecane 0.27
    tert-butylcyclohexane 0.26
    cyclooctane 0.28
    cyclopentanol 40.26
    tetrahydropyran 9.24
    tert-amyl methyl ether 2.12
    2,5,8-trioxanonane 26.11
    1-hexene 1.01
    2-isopropoxyethanol 15.45
    2,2,2-trifluoroethanol 203.75
    methyl butyrate 6.43

    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

Botanical

Name CAS Botanical Proportion
Orange, bitter (Spain) 2 72968-50-4 Citrus aurantium L., ssp. amara Engl., fam. Rutaceae 0.1%
Rose (Bulgaria) 2 8007-01-0 Rosa damascena Mill., fam. Rosaceae 0.08%
Carob bean extract 1 9000-40-2 Ceratonia siliqua L., fam. Leguminoseae 0.01%