Sodium Azide

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  • Identifiers

    CAS number
    26628-22-8

    Molecular formula
    N3Na

    SMILES
    [N-]=[N+]=[N-].[Na+]

    Safety labels

    Acute Toxic
    Acute Toxic

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Odorless 87.45%
    Pungent 40.94%
    Sharp 19.33%
    Radish 18.8%
    Burnt 16.57%
    Sulfurous 13.69%
    Sour 13.4%
    Bitter 11.99%
    Alliaceous 11.71%
    Garlic 10.81%

     

    Flavor
    Bitter 57.78%
    Odorless 52.31%
    Mustard 40.64%
    Pungent 39.44%
    Sulfur 29.48%
    Formyl 24.93%
    Horseradish 22.81%
    Rotten 22.81%
    Vinegar 21.94%
    Strong 20.66%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    0.93 (strong acid)

    Molecular weight
    65.01 g/mol

    Melting point expt.

    • Decomposes at 527 °F to sodium and nitrogen (EPA, 1998)
    • 275 °C (decomp)
    • 527 °F (decomposes to sodium and nitrogen)
    • 527 °F (Decomposes)

    Boiling point

    • Decomposes in vacuum (EPA, 1998)
    • decomposes
    • Decomposes

    Flash point

    • 61.6 ˚C est.
    • Not flammable (EPA, 1998)

    Solubility expt.

    • 50 to 100 mg/mL at 72 °F (NTP, 1992)
    • In water, 41.0 g/100 mL at 17 °C
    • Highly soluble in water. Rapidly converted to hydrazoic acid ... Solubility in water: 40.16% at 10 °C; 41.7% at 17 °C
    • Slightly soluble in ethanol, insoluble in ethyl ether
    • Slightly soluble in alcohol; insoluble in ether; soluble in liquid ammonia
    • Solubility in water, g/100ml at 17 °C: 41.7 (good)
    • (63 °F): 42%

  • Synonyms

    • sodium azide
    • 26628-22-8
    • Azide, sodium
    • Natriumazid
    • Hydrazoic acid sodium salt
    • Azoture de sodium
    • Nemazyd
    • Kazoe
    • SMITE
    • Sodium, azoture de
    • azidosodium
    • Natriummazide
    • Sodiumazide
    • hydrazoic acid, sodium salt
    • Natriumazid [German]
    • sodium;azide
    • Azydek sodu
    • Natriummazide [Dutch]
    • Azydek sodu [Polish]
    • Caswell No. 744A
    • Sodium, azoturo di
    • RCRA waste number P105
    • Azoture de sodium [French]
    • NSC 3072
    • Sodium, azoture de [French]
    • Sodium, azoturo di [Italian]
    • CCRIS 1261
    • HSDB 695
    • NCI-C06462
    • EINECS 247-852-1
    • EPA Pesticide Chemical Code 107701
    • 968JJ8C9DV
    • DTXSID8020121
    • AI3-50436
    • CHEBI:278547
    • Sodium Azide-15N3
    • U-3886
    • SODIUM AZIDE [MI]
    • SODIUM AZIDE [HSDB]
    • CHEMBL89295
    • DTXCID80121
    • EC 247-852-1
    • NSC-3072
    • Natriumazid (German)
    • Azydek sodu (Polish)
    • Natriummazide (Dutch)
    • Na N3
    • Sodium trinitride
    • Azoture de sodium (French)
    • Sodium, azoture de (French)
    • Sodium, azoturo di (Italian)
    • 1015486-10-8
    • CAS-26628-22-8
    • NaN3
    • UN1687
    • RCRA waste no. P105
    • UNII-968JJ8C9DV
    • Sodium salt of hydrazoic acid
    • azido sodium
    • sodium azid
    • sodium-azide
    • Natrium azide
    • sodium azid e
    • Azide, 2% solution
    • Sodium azide (ACGIH)
    • SODIUM AZIDE(NA(N3))
    • Tox21_202461
    • Tox21_300024
    • Sodium azide [UN1687] [Poison]
    • AKOS015833396
    • AKOS015951264
    • FS07873
    • NCGC00090996-01
    • NCGC00254054-01
    • NCGC00260010-01
    • NS00076412
    • S0489
    • Q407577
    • 247-852-1

  • Applications

    Sodium Azide (CAS 26628-22-8) is widely used as an azide source in organic synthesis, notably for preparing aryl and alkyl azides and for azide-functionalization of polymers to enable CuAAC (click) reactions in materials, coatings, and adhesives. It also serves as a precursor for hydrazoic acid and azide gases used in gas-generating systems for automotive airbags. In laboratory settings, sodium azide is employed as a preservative/antimicrobial agent in certain solutions and microbiology media. In some industrial water treatment formulations, it may be used as a corrosion-inhibiting additive or in related metal-protection formulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 8.82
    methanol 14.33
    isopropanol 6.41
    water 1.12
    ethyl acetate 12.61
    n-propanol 6.05
    acetone 30.97
    n-butanol 5.13
    acetonitrile 21.72
    DMF 108.73
    toluene 5.18
    isobutanol 4.67
    1,4-dioxane 24.72
    methyl acetate 21.84
    THF 28.92
    2-butanone 19.86
    n-pentanol 4.37
    sec-butanol 5.46
    n-hexane 1.45
    ethylene glycol 7.34
    NMP 100.4
    cyclohexane 1.61
    DMSO 112.42
    n-butyl acetate 9.08
    n-octanol 4.91
    chloroform 9.86
    n-propyl acetate 8.45
    acetic acid 17.29
    dichloromethane 13.17
    cyclohexanone 20.61
    propylene glycol 5.62
    isopropyl acetate 8.56
    DMAc 105.19
    2-ethoxyethanol 12.11
    isopentanol 5.1
    n-heptane 1.53
    ethyl formate 11.14
    1,2-dichloroethane 13.0
    n-hexanol 4.71
    2-methoxyethanol 22.98
    isobutyl acetate 4.95
    tetrachloromethane 2.45
    n-pentyl acetate 7.06
    transcutol 31.11
    n-heptanol 3.47
    ethylbenzene 3.81
    MIBK 9.0
    2-propoxyethanol 12.71
    tert-butanol 9.49
    MTBE 10.69
    2-butoxyethanol 8.31
    propionic acid 11.79
    o-xylene 6.47
    formic acid 10.59
    diethyl ether 9.81
    m-xylene 4.52
    p-xylene 5.39
    chlorobenzene 8.08
    dimethyl carbonate 15.53
    n-octane 0.88
    formamide 19.17
    cyclopentanone 32.77
    2-pentanone 13.08
    anisole 11.17
    cyclopentyl methyl ether 12.5
    gamma-butyrolactone 39.65
    1-methoxy-2-propanol 16.7
    pyridine 20.3
    3-pentanone 14.22
    furfural 35.6
    n-dodecane 1.0
    diethylene glycol 14.06
    diisopropyl ether 4.31
    tert-amyl alcohol 8.06
    acetylacetone 20.95
    n-hexadecane 1.11
    acetophenone 13.31
    methyl propionate 16.47
    isopentyl acetate 8.04
    trichloroethylene 17.99
    n-nonanol 4.59
    cyclohexanol 5.84
    benzyl alcohol 8.19
    2-ethylhexanol 4.37
    isooctanol 3.12
    dipropyl ether 6.31
    1,2-dichlorobenzene 8.95
    ethyl lactate 7.61
    propylene carbonate 18.81
    n-methylformamide 29.28
    2-pentanol 4.22
    n-pentane 1.36
    1-propoxy-2-propanol 10.46
    1-methoxy-2-propyl acetate 13.04
    2-(2-methoxypropoxy) propanol 15.13
    mesitylene 3.73
    ε-caprolactone 18.02
    p-cymene 4.23
    epichlorohydrin 24.94
    1,1,1-trichloroethane 9.33
    2-aminoethanol 7.85
    morpholine-4-carbaldehyde 58.14
    sulfolane 61.11
    2,2,4-trimethylpentane 1.15
    2-methyltetrahydrofuran 17.11
    n-hexyl acetate 9.72
    isooctane 0.82
    2-(2-butoxyethoxy)ethanol 14.23
    sec-butyl acetate 6.2
    tert-butyl acetate 10.68
    decalin 1.46
    glycerin 10.46
    diglyme 28.94
    acrylic acid 15.47
    isopropyl myristate 5.87
    n-butyric acid 9.4
    acetyl acetate 11.54
    di(2-ethylhexyl) phthalate 6.77
    ethyl propionate 9.23
    nitromethane 48.31
    1,2-diethoxyethane 11.86
    benzonitrile 11.9
    trioctyl phosphate 4.95
    1-bromopropane 6.81
    gamma-valerolactone 39.15
    n-decanol 3.91
    triethyl phosphate 7.31
    4-methyl-2-pentanol 3.42
    propionitrile 11.15
    vinylene carbonate 17.54
    1,1,2-trichlorotrifluoroethane 22.28
    DMS 16.28
    cumene 3.46
    2-octanol 3.08
    2-hexanone 9.42
    octyl acetate 7.08
    limonene 5.78
    1,2-dimethoxyethane 25.93
    ethyl orthosilicate 6.44
    tributyl phosphate 6.27
    diacetone alcohol 13.74
    N,N-dimethylaniline 11.38
    acrylonitrile 18.62
    aniline 8.14
    1,3-propanediol 8.77
    bromobenzene 6.81
    dibromomethane 8.38
    1,1,2,2-tetrachloroethane 15.63
    2-methyl-cyclohexyl acetate 7.82
    tetrabutyl urea 10.32
    diisobutyl methanol 3.9
    2-phenylethanol 7.62
    styrene 5.1
    dioctyl adipate 9.11
    dimethyl sulfate 37.3
    ethyl butyrate 8.26
    methyl lactate 14.11
    butyl lactate 7.65
    diethyl carbonate 7.19
    propanediol butyl ether 9.91
    triethyl orthoformate 7.28
    p-tert-butyltoluene 4.27
    methyl 4-tert-butylbenzoate 13.51
    morpholine 23.5
    tert-butylamine 5.94
    n-dodecanol 3.42
    dimethoxymethane 32.06
    ethylene carbonate 13.67
    cyrene 16.81
    2-ethoxyethyl acetate 11.24
    2-ethylhexyl acetate 7.08
    1,2,4-trichlorobenzene 11.79
    4-methylpyridine 18.43
    dibutyl ether 6.11
    2,6-dimethyl-4-heptanol 3.9
    DEF 26.59
    dimethyl isosorbide 22.69
    tetrachloroethylene 10.3
    eugenol 12.67
    triacetin 14.53
    span 80 11.14
    1,4-butanediol 4.5
    1,1-dichloroethane 9.84
    2-methyl-1-pentanol 4.51
    methyl formate 24.35
    2-methyl-1-butanol 4.77
    n-decane 1.31
    butyronitrile 8.21
    3,7-dimethyl-1-octanol 4.9
    1-chlorooctane 3.57
    1-chlorotetradecane 2.31
    n-nonane 1.21
    undecane 1.14
    tert-butylcyclohexane 1.32
    cyclooctane 0.8
    cyclopentanol 7.98
    tetrahydropyran 13.09
    tert-amyl methyl ether 10.07
    2,5,8-trioxanonane 24.63
    1-hexene 3.36
    2-isopropoxyethanol 8.54
    2,2,2-trifluoroethanol 10.71
    methyl butyrate 11.71

    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