Dibromomethane

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  • Identifiers

    CAS number
    74-95-3

    Molecular formula
    CH2Br2

    SMILES
    C(Br)Br

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Fishy 52.04%
    Cheesy 45.69%
    Ripe 39.36%
    Meaty 36.43%
    Sulfurous 35.35%
    Odorless 31.73%
    Vegetable 25.59%
    Pungent 24.47%
    Savory 22.84%
    Oily 22.33%

     

    Flavor
    Fishy 37.23%
    Sulfurous 30.92%
    Ammoniacal 30.25%
    Meaty 29.03%
    Sulfury 26.85%
    Odorless 23.75%
    Onion 23.48%
    Egg 22.21%
    Garlic 20.25%
    Ammonia 20.2%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    1.8

    pKa est.
    3.61 (weak acid)

    Molecular weight
    173.83 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Melting point expt.

    • -62.5 °F (USCG, 1999)
    • -52.5 °C
    • -52.7 °C

    Boiling point

    • 206.6 °F at 760 mmHg (USCG, 1999)
    • 97 °C

    Flash point

    • 36.52 ˚C est.

    Solubility expt.

    • 11.70 g/1000 g water @ 15 °C; 11.93 g/1000 g water @ 30 °C
    • Miscible with chloroform, alcohol, ether, acetone
    • > 10% in acetone
    • > 10% in ether
    • For more Solubility (Complete) data for DIBROMOMETHANE (6 total), please visit the HSDB record page.
    • Solubility in water, g/100ml at 15 °C: 1.2 (moderate)

  • Synonyms

    • dibromomethane
    • 74-95-3
    • Methylene bromide
    • Methane, dibromo-
    • Methylene dibromide
    • CH2Br2
    • Dibrommethan
    • Methylenbromid
    • RCRA waste number U068
    • Dibromomethylene
    • CCRIS 939
    • dibromo-methane
    • HSDB 1334
    • NSC 7293
    • EINECS 200-824-2
    • UN2664
    • 1,1-dibromomethane
    • BRN 0969143
    • DTXSID4021557
    • CHEBI:47077
    • AI3-52311
    • NSC-7293
    • MFCD00000168
    • V69B659W01
    • METHYLENE BROMIDE [MI]
    • DTXCID401557
    • EC 200-824-2
    • 4-01-00-00078 (Beilstein Handbook Reference)
    • 4371-77-1
    • MFCD00000169
    • RCRA waste no. U068
    • dibromo methane
    • Qmacd\qih
    • methane, dibromo
    • UNII-V69B659W01
    • Dibromomethane, 99%
    • Dibromomethane, >=99%
    • WLN: E1E
    • SCHEMBL20033
    • CHEMBL1229889
    • DTXSID10162481
    • NSC7293
    • Dibromomethane, analytical standard
    • Dibromomethane, stabilized with BHT
    • Tox21_200410
    • STL282729
    • AKOS009031545
    • Dibromomethane [UN2664] [Poison]
    • FD61325
    • UN 2664
    • CAS-74-95-3
    • NCGC00248598-01
    • NCGC00257964-01
    • 2BM
    • SY350729
    • DB-029642
    • D0192
    • NS00005937
    • S0636
    • A15094
    • Q421736
    • F1908-0088
    • 200-824-2

  • Applications

    Dibromomethane (CAS 74-95-3) is primarily used as an industrial solvent and chemical intermediate: it serves as a solvent for organic reactions and for extraction and purification of natural products. It also acts as a building block for bromomethylation reactions to introduce bromomethyl groups into molecules, supporting the synthesis of brominated specialty chemicals. In addition, dibromomethane is used as a precursor for brominated compounds employed in materials applications such as polymers, coatings and inks, or as an additive to enhance flame retardancy in plastics. In laboratory and process development contexts, it is used as a starting reagent or precursor for various syntheses, with usage subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 36.28
    methanol 26.02
    isopropanol 36.21
    water 0.81
    ethyl acetate 93.92
    n-propanol 39.0
    acetone 134.6
    n-butanol 47.04
    acetonitrile 65.89
    DMF 145.71
    toluene 146.86
    isobutanol 36.53
    1,4-dioxane 225.18
    methyl acetate 86.29
    THF 322.95
    2-butanone 103.73
    n-pentanol 48.32
    sec-butanol 41.4
    n-hexane 43.33
    ethylene glycol 14.96
    NMP 274.39
    cyclohexane 109.86
    DMSO 195.35
    n-butyl acetate 133.24
    n-octanol 67.74
    chloroform 278.9
    n-propyl acetate 91.37
    acetic acid 77.56
    dichloromethane 233.25
    cyclohexanone 238.11
    propylene glycol 16.29
    isopropyl acetate 82.26
    DMAc 156.29
    2-ethoxyethanol 73.52
    isopentanol 49.21
    n-heptane 80.68
    ethyl formate 62.01
    1,2-dichloroethane 166.06
    n-hexanol 72.67
    2-methoxyethanol 85.42
    isobutyl acetate 78.14
    tetrachloromethane 109.07
    n-pentyl acetate 108.96
    transcutol 271.1
    n-heptanol 58.21
    ethylbenzene 89.95
    MIBK 95.23
    2-propoxyethanol 106.86
    tert-butanol 58.26
    MTBE 85.22
    2-butoxyethanol 85.7
    propionic acid 48.08
    o-xylene 119.78
    formic acid 21.08
    diethyl ether 100.36
    m-xylene 112.07
    p-xylene 114.68
    chlorobenzene 170.32
    dimethyl carbonate 56.59
    n-octane 39.0
    formamide 35.45
    cyclopentanone 261.46
    2-pentanone 112.67
    anisole 141.57
    cyclopentyl methyl ether 204.11
    gamma-butyrolactone 225.89
    1-methoxy-2-propanol 73.59
    pyridine 219.98
    3-pentanone 107.25
    furfural 244.79
    n-dodecane 30.01
    diethylene glycol 75.57
    diisopropyl ether 70.82
    tert-amyl alcohol 57.05
    acetylacetone 163.28
    n-hexadecane 33.88
    acetophenone 149.37
    methyl propionate 79.34
    isopentyl acetate 118.87
    trichloroethylene 301.0
    n-nonanol 65.46
    cyclohexanol 98.55
    benzyl alcohol 94.18
    2-ethylhexanol 80.19
    isooctanol 57.36
    dipropyl ether 138.49
    1,2-dichlorobenzene 167.19
    ethyl lactate 49.02
    propylene carbonate 140.72
    n-methylformamide 54.4
    2-pentanol 47.54
    n-pentane 41.0
    1-propoxy-2-propanol 109.17
    1-methoxy-2-propyl acetate 125.63
    2-(2-methoxypropoxy) propanol 110.25
    mesitylene 95.61
    ε-caprolactone 185.94
    p-cymene 101.83
    epichlorohydrin 219.15
    1,1,1-trichloroethane 210.46
    2-aminoethanol 23.32
    morpholine-4-carbaldehyde 234.39
    sulfolane 304.5
    2,2,4-trimethylpentane 34.01
    2-methyltetrahydrofuran 234.88
    n-hexyl acetate 121.6
    isooctane 29.1
    2-(2-butoxyethoxy)ethanol 127.66
    sec-butyl acetate 78.97
    tert-butyl acetate 111.69
    decalin 59.97
    glycerin 28.33
    diglyme 236.96
    acrylic acid 54.23
    isopropyl myristate 81.26
    n-butyric acid 72.32
    acetyl acetate 96.81
    di(2-ethylhexyl) phthalate 69.84
    ethyl propionate 83.13
    nitromethane 118.39
    1,2-diethoxyethane 163.28
    benzonitrile 134.0
    trioctyl phosphate 55.29
    1-bromopropane 116.58
    gamma-valerolactone 257.0
    n-decanol 56.66
    triethyl phosphate 78.17
    4-methyl-2-pentanol 42.95
    propionitrile 56.97
    vinylene carbonate 128.75
    1,1,2-trichlorotrifluoroethane 166.27
    DMS 101.77
    cumene 75.52
    2-octanol 55.67
    2-hexanone 106.05
    octyl acetate 85.76
    limonene 139.77
    1,2-dimethoxyethane 158.95
    ethyl orthosilicate 80.54
    tributyl phosphate 65.28
    diacetone alcohol 100.19
    N,N-dimethylaniline 129.86
    acrylonitrile 67.7
    aniline 114.79
    1,3-propanediol 34.99
    bromobenzene 199.88
    dibromomethane 194.45
    1,1,2,2-tetrachloroethane 250.28
    2-methyl-cyclohexyl acetate 116.02
    tetrabutyl urea 97.17
    diisobutyl methanol 76.47
    2-phenylethanol 104.29
    styrene 110.56
    dioctyl adipate 102.64
    dimethyl sulfate 101.75
    ethyl butyrate 118.44
    methyl lactate 48.84
    butyl lactate 74.72
    diethyl carbonate 81.87
    propanediol butyl ether 71.18
    triethyl orthoformate 102.47
    p-tert-butyltoluene 101.72
    methyl 4-tert-butylbenzoate 135.1
    morpholine 183.16
    tert-butylamine 51.36
    n-dodecanol 52.7
    dimethoxymethane 113.63
    ethylene carbonate 105.07
    cyrene 132.38
    2-ethoxyethyl acetate 123.79
    2-ethylhexyl acetate 119.95
    1,2,4-trichlorobenzene 196.52
    4-methylpyridine 198.07
    dibutyl ether 116.07
    2,6-dimethyl-4-heptanol 76.47
    DEF 130.53
    dimethyl isosorbide 226.81
    tetrachloroethylene 196.36
    eugenol 121.76
    triacetin 127.09
    span 80 114.87
    1,4-butanediol 24.53
    1,1-dichloroethane 141.28
    2-methyl-1-pentanol 52.21
    methyl formate 58.14
    2-methyl-1-butanol 45.14
    n-decane 42.01
    butyronitrile 69.99
    3,7-dimethyl-1-octanol 73.16
    1-chlorooctane 85.84
    1-chlorotetradecane 52.29
    n-nonane 43.44
    undecane 34.22
    tert-butylcyclohexane 50.24
    cyclooctane 61.71
    cyclopentanol 100.24
    tetrahydropyran 214.84
    tert-amyl methyl ether 91.35
    2,5,8-trioxanonane 193.5
    1-hexene 69.42
    2-isopropoxyethanol 74.03
    2,2,2-trifluoroethanol 46.3
    methyl butyrate 97.7

    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