Bromine

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  • Identifiers

    CAS number
    7726-95-6

    Molecular formula
    Br2

    SMILES
    BrBr

    Safety labels

    Corrosive
    Corrosive

    Acute Toxic
    Acute Toxic

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Fishy 57.92%
    Odorless 44.74%
    Cheesy 44.65%
    Ripe 41.01%
    Sulfurous 28.58%
    Meaty 26.11%
    Fermented 23.67%
    Oily 23.22%
    Alcoholic 22.41%
    Pungent 21.74%

     

    Flavor
    Fishy 35.52%
    Egg 31.66%
    Ammoniacal 29.14%
    Garlic 25.93%
    Rotten 24.51%
    Sulfur 23.78%
    Odorless 22.26%
    Sulfurous 21.82%
    Decomposing cabbage 21.73%
    Ammonia 21.4%

     

    Odor impact est.
    Medium

    Odor threshold

    • Odor Threshold Low: 0.0099 [mmHg]. Odor Threshold High: 0.46 [mmHg]. Odor threshold from AIHA (<0.0099-0.46 ppm)
    • ODOR THRESHOLDS OF 0.05-3.5 PPM HAVE BEEN REPORTED.
    • Odor low 0.329 mg/cu m; Odor high 24.5 mg/cu m
    • Air odor threshold: 0.051 ppm (v/v); water odor threshold: 0.0063 ppm (w/v)

  • Properties

    XLogP3-AA
    1.9

    pKa est.
    -61.99 (strong acid)

    Molecular weight
    159.81 g/mol

    Melting point expt.

    • 19 °F (EPA, 1998)
    • -7.2 °C
    • 19 °F

    Boiling point

    • 139.2 °F at 760 mmHg (EPA, 1998)
    • 58.8 °C
    • 139 °F

    Flash point

    • 123.57 ˚C est.

    Solubility expt.

    • 4 % (NIOSH, 2024)
    • Solubility in water (25 °C): 0.2141 mol/L with formation of 0.00115 mol/L of HOBr
    • In water, 33.6 g/L at 25 °C
    • Water solubility: 35.8 g/L at 20 °C; 41.7 g/L at 0 °C
    • Freely soluble in alcohol, ether, chloroform, carbon tetrachloride, carbon disulfide, concentrated hydrochloride acid, aq solutions of bromides
    • Bromine is soluble in nonpolar solvents and in certain polar solvents such as alcohol and sulfuric acid. It is miscible with ... many halogenated solvents.
    • Solubility in water, g/100ml at 20 °C: 4.0
    • 4%

  • Synonyms

    • BROMINE
    • 7726-95-6
    • BR
    • Dibromine
    • molecular bromine
    • Brom
    • Brome
    • Bromo
    • Broom
    • Caswell No. 112
    • SBV4XY874G
    • BROMIUM
    • HSDB 514
    • EINECS 231-778-1
    • MFCD00010896
    • UNII-SBV4XY874G
    • EPA Pesticide Chemical Code 008701
    • Br2
    • DTXSID1035238
    • CHEBI:29224
    • BROMINE (MART.)
    • BROMINE [MART.]
    • EC 231-778-1
    • Bromo [Italian]
    • Bromo [Spanish]
    • Brome [French]
    • Brom [German]
    • Broom [Dutch]
    • Bromine 79
    • dibromane
    • Bromoniumbromid
    • bromine-bromide
    • Bromine liquid
    • Total Bromine
    • bromo-
    • Bromium 6C
    • Bromine water, CP
    • Bromium 30C
    • UN1744
    • Bromine, reagent grade
    • BROMINE [HSDB]
    • BROMIUM [HPUS]
    • BROMINE [MI]
    • BROMINE [WHO-DD]
    • Bromine, LR, >=99%
    • Bromine, p.a., 99.5%
    • DTXCID9015238
    • Bromine Number - 2 g/100 g
    • Bromine Index - 10 mg/100 g
    • Bromine Number - 10 g/100 g
    • BCP26202
    • Bromine Index - 100 mg/100 g
    • Bromine, ACS reagent, >=99.5%
    • BR1014
    • Bromine Index - 1000 mg/100 g
    • AKOS015897100
    • UN 1744
    • Bromine, SAJ first grade, >=97.0%
    • USEPA/OPP Pesticide Code: 008701
    • Bromine, >=99.99% trace metals basis
    • Bromine, JIS special grade, >=99.0%
    • BP-24346
    • B2414
    • Bromine, puriss. p.a., >=99.0% (RT)
    • NS00075687
    • Q2685750
    • 231-778-1

  • Applications

    Bromine (CAS 7726-95-6) is used as a building block for organobromine chemistry across industries and as a component in flame-retardant formulations for polymers and coatings; serves as a precursor for pharmaceutical and agrochemical intermediates; participates in the production of dyes and pigments and in photographic chemicals; used as a bromine-based disinfectant for industrial process water and swimming pools; plays a role in electronics-related coatings and inks with brominated flame retardants for fire safety; and brine solutions containing bromide are used as drilling fluids in oilfield operations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 107.95
    methanol 94.25
    isopropanol 96.95
    water 0.99
    ethyl acetate 234.38
    n-propanol 102.54
    acetone 307.87
    n-butanol 116.37
    acetonitrile 177.53
    DMF 408.67
    toluene 245.24
    isobutanol 91.66
    1,4-dioxane 486.52
    methyl acetate 207.96
    THF 659.73
    2-butanone 250.17
    n-pentanol 97.36
    sec-butanol 103.84
    n-hexane 86.73
    ethylene glycol 37.9
    NMP 604.93
    cyclohexane 178.61
    DMSO 427.86
    n-butyl acetate 235.57
    n-octanol 134.31
    chloroform 521.3
    n-propyl acetate 173.4
    acetic acid 182.79
    dichloromethane 438.2
    cyclohexanone 459.94
    propylene glycol 44.98
    isopropyl acetate 187.51
    DMAc 374.12
    2-ethoxyethanol 152.62
    isopentanol 117.14
    n-heptane 100.55
    ethyl formate 134.77
    1,2-dichloroethane 315.1
    n-hexanol 142.43
    2-methoxyethanol 212.86
    isobutyl acetate 135.79
    tetrachloromethane 191.46
    n-pentyl acetate 198.16
    transcutol 542.75
    n-heptanol 110.0
    ethylbenzene 144.46
    MIBK 199.98
    2-propoxyethanol 222.27
    tert-butanol 159.91
    MTBE 210.1
    2-butoxyethanol 166.18
    propionic acid 122.64
    o-xylene 188.81
    formic acid 41.51
    diethyl ether 244.45
    m-xylene 184.97
    p-xylene 192.16
    chlorobenzene 298.64
    dimethyl carbonate 133.47
    n-octane 54.39
    formamide 70.07
    cyclopentanone 553.17
    2-pentanone 262.16
    anisole 260.84
    cyclopentyl methyl ether 371.32
    gamma-butyrolactone 485.74
    1-methoxy-2-propanol 198.45
    pyridine 400.13
    3-pentanone 233.51
    furfural 445.2
    n-dodecane 43.33
    diethylene glycol 161.41
    diisopropyl ether 138.35
    tert-amyl alcohol 146.82
    acetylacetone 349.58
    n-hexadecane 49.27
    acetophenone 256.6
    methyl propionate 191.76
    isopentyl acetate 217.96
    trichloroethylene 561.38
    n-nonanol 123.23
    cyclohexanol 193.64
    benzyl alcohol 153.88
    2-ethylhexanol 135.35
    isooctanol 99.03
    dipropyl ether 229.81
    1,2-dichlorobenzene 291.17
    ethyl lactate 90.58
    propylene carbonate 287.83
    n-methylformamide 131.31
    2-pentanol 108.6
    n-pentane 81.42
    1-propoxy-2-propanol 205.49
    1-methoxy-2-propyl acetate 239.01
    2-(2-methoxypropoxy) propanol 212.21
    mesitylene 156.09
    ε-caprolactone 368.03
    p-cymene 132.39
    epichlorohydrin 441.72
    1,1,1-trichloroethane 423.44
    2-aminoethanol 58.92
    morpholine-4-carbaldehyde 481.46
    sulfolane 610.25
    2,2,4-trimethylpentane 57.77
    2-methyltetrahydrofuran 491.77
    n-hexyl acetate 240.84
    isooctane 50.22
    2-(2-butoxyethoxy)ethanol 254.24
    sec-butyl acetate 142.07
    tert-butyl acetate 247.02
    decalin 93.66
    glycerin 73.19
    diglyme 458.67
    acrylic acid 130.86
    isopropyl myristate 136.79
    n-butyric acid 172.53
    acetyl acetate 220.03
    di(2-ethylhexyl) phthalate 123.31
    ethyl propionate 167.29
    nitromethane 270.88
    1,2-diethoxyethane 285.44
    benzonitrile 232.65
    trioctyl phosphate 93.91
    1-bromopropane 231.36
    gamma-valerolactone 498.83
    n-decanol 100.89
    triethyl phosphate 126.16
    4-methyl-2-pentanol 88.07
    propionitrile 145.12
    vinylene carbonate 249.98
    1,1,2-trichlorotrifluoroethane 304.29
    DMS 215.81
    cumene 112.49
    2-octanol 100.04
    2-hexanone 191.69
    octyl acetate 160.19
    limonene 194.85
    1,2-dimethoxyethane 342.54
    ethyl orthosilicate 128.21
    tributyl phosphate 109.23
    diacetone alcohol 227.34
    N,N-dimethylaniline 218.25
    acrylonitrile 167.44
    aniline 198.3
    1,3-propanediol 90.99
    bromobenzene 345.37
    dibromomethane 364.74
    1,1,2,2-tetrachloroethane 454.72
    2-methyl-cyclohexyl acetate 182.52
    tetrabutyl urea 161.58
    diisobutyl methanol 117.25
    2-phenylethanol 178.69
    styrene 190.28
    dioctyl adipate 176.8
    dimethyl sulfate 233.03
    ethyl butyrate 200.19
    methyl lactate 111.32
    butyl lactate 130.94
    diethyl carbonate 146.08
    propanediol butyl ether 146.78
    triethyl orthoformate 166.49
    p-tert-butyltoluene 137.39
    methyl 4-tert-butylbenzoate 238.97
    morpholine 401.04
    tert-butylamine 125.04
    n-dodecanol 88.75
    dimethoxymethane 285.63
    ethylene carbonate 205.29
    cyrene 232.9
    2-ethoxyethyl acetate 237.08
    2-ethylhexyl acetate 202.6
    1,2,4-trichlorobenzene 340.46
    4-methylpyridine 379.23
    dibutyl ether 207.73
    2,6-dimethyl-4-heptanol 117.25
    DEF 298.53
    dimethyl isosorbide 402.34
    tetrachloroethylene 331.0
    eugenol 216.8
    triacetin 244.45
    span 80 217.76
    1,4-butanediol 50.7
    1,1-dichloroethane 314.75
    2-methyl-1-pentanol 102.98
    methyl formate 125.46
    2-methyl-1-butanol 106.96
    n-decane 62.86
    butyronitrile 156.83
    3,7-dimethyl-1-octanol 130.09
    1-chlorooctane 140.97
    1-chlorotetradecane 78.91
    n-nonane 66.15
    undecane 50.27
    tert-butylcyclohexane 80.98
    cyclooctane 90.4
    cyclopentanol 210.24
    tetrahydropyran 442.0
    tert-amyl methyl ether 197.14
    2,5,8-trioxanonane 367.04
    1-hexene 143.07
    2-isopropoxyethanol 137.04
    2,2,2-trifluoroethanol 87.13
    methyl butyrate 197.19

    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