Sodium Nitrite

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  • Identifiers

    CAS number
    7632-00-0

    Molecular formula
    NNaO2

    SMILES
    N(=O)[O-].[Na+]

    Safety labels

    Oxidizer
    Oxidizer

    Acute Toxic
    Acute Toxic

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Odorless 82.72%
    Pungent 23.25%
    Sharp 22.87%
    Sour 20.23%
    Fruity 15.9%
    Ethereal 15.08%
    Caramellic 14.61%
    Burnt 14.58%
    Fermented 12.93%
    Cheesy 12.92%

     

    Flavor
    Odorless 57.92%
    Pungent 36.19%
    Mustard 30.33%
    Vinegar 29.5%
    Sour 27.37%
    Formyl 26.45%
    Bitter 24.46%
    Sulfur 22.66%
    Mousy 22.31%
    Rotten 21.87%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    0.44 (strong acid)

    Molecular weight
    68.995 g/mol

    Melting point expt.

    • 520 °F (NTP, 1992)
    • 30 °F (USCG, 1999)
    • 271 °C
    • No melting point; decomposes at 280 °C

    Boiling point

    • Decomposes at 608 °F (NTP, 1992)
    • 239 °F at 760 mmHg (USCG, 1999)

    Flash point

    • 42.85 ˚C est.

    Solubility expt.

    • greater than or equal to 100 mg/mL at 66 °F (NTP, 1992)
    • Sol in water; moderately sol in methanol; sparingly soluble in diethyl ether
    • Slightly soluble in ethanol
    • Sol in 1.5 parts cold, 0.6 parts boiling water.
    • 84.8 g/100 g of water at 25 °C
    • 0.3 G/100 CC ETHER AT 20 °C; 4.4 G/100 CC METHANOL AT 20 °C; 3 G/100 CC ABS ALC AT 20 °C; VERY SOL IN AMMONIA.
    • Solubility in water, g/100ml at 20 °C: 82

  • Synonyms

    • SODIUM NITRITE
    • 7632-00-0
    • Nitrous acid, sodium salt
    • Nitrite, sodium
    • Erinitrit
    • Filmerine
    • Natrium nitrit
    • Nitrito sodico
    • Anti-rust
    • Nitrite de sodium
    • Natrum nitrosum
    • Azotyn sodowy
    • Dusitan sodny
    • Synfat 1004
    • Nitrous acid soda
    • NaNO2
    • DTXSID0020941
    • Natrii nitris
    • NCI-C02084
    • INS NO.250
    • M0KG633D4F
    • INS-250
    • Sodium nitrite (USP)
    • Sodium nitrite [USP]
    • NSC-77391
    • DTXCID00941
    • CHEBI:78870
    • RefChem:56029
    • 231-555-9
    • sodium;nitrite
    • sodiumnitrite
    • NNaO2
    • MFCD00011118
    • CHEMBL93268
    • Sodium Nitrite-18O2 (10% 16O2)
    • Caswell No. 782
    • Dusitan sodny [Czech]
    • Azotyn sodowy [Polish]
    • Natrium nitrit [German]
    • Nitrito sodico [Spanish]
    • Nitrite de sodium [French]
    • CCRIS 559
    • CAS-7632-00-0
    • HSDB 757
    • EINECS 231-555-9
    • NSC 77391
    • UN1500
    • EPA Pesticide Chemical Code 076204
    • UNII-M0KG633D4F
    • natrium nitrite
    • sodium nitrit
    • Sodium nitrite ACS grade
    • SCHEMBL341
    • EC 231-555-9
    • SODIUM NITRITE [MI]
    • SODIUM NITRITE [FCC]
    • SODIUM NITRITE [HSDB]
    • NATRUM NITROSUM [HPUS]
    • SODIUM NITRITE [VANDF]
    • orb1944701
    • orb3025097
    • Acidified sodium nitrite (ASN)
    • SODIUM NITRITE [MART.]
    • Sodium Nitrite 1000ppm As N
    • Sodium nitrite, AR, >=98%
    • Sodium nitrite, LR, >=98%
    • SODIUM NITRITE [USP-RS]
    • SODIUM NITRITE [WHO-DD]
    • SODIUM NITRITE [WHO-IP]
    • HMS3652K08
    • Nitrous acid, sodium salt (1:1)
    • Sodium nitrite, analytical standard
    • Sodium nitrite, granular, 99.5%
    • Sodium nitrite, Trace metals grade
    • Tox21_202155
    • Tox21_300025
    • s4074
    • SODIUM NITRITE [ORANGE BOOK]
    • NATRII NITRIS [WHO-IP LATIN]
    • SODIUM NITRITE [EP MONOGRAPH]
    • AKOS024427981
    • SODIUM NITRITE [USP MONOGRAPH]
    • CCG-266007
    • NCGC00090737-01
    • NCGC00090737-02
    • NCGC00254137-01
    • NCGC00259704-01
    • Sodium nitrite [UN1500] [Oxidizer]
    • BP-31053
    • E250
    • NITHIODOTE COMPONENT SODIUM NITRITE
    • Sodium nitrite, ACS reagent, >=97.0%
    • Sodium nitrite, p.a., ACS reagent, 99%
    • NS00075682
    • S0565
    • Sodium nitrite, 99.5%, super free-flowing
    • Sodium nitrite, ReagentPlus(R), >=99.0%
    • SW219150-1
    • 0.1M Sodium nitrite (naturally short expiry)
    • Sodium nitrite, 99.999% trace metals basis
    • Sodium nitrite, SAJ first grade, >=97.0%
    • D05865
    • E78844
    • Sodium nitrite, >=99.99% trace metals basis
    • Sodium nitrite, JIS special grade, >=98.5%
    • Sodium nitrite, purum p.a., >=98.0% (RT)
    • F035920
    • Q339975
    • Sodium nitrite, puriss. p.a., ACS reagent, >=99.0% (RT)
    • Sodium nitrite, United States Pharmacopeia (USP) Reference Standard
    • Reagecon Sodium Nitrite 0.1M according to Chinese Pharmacopoeia (ChP)
    • Sodium nitrite, anhydrous, free-flowing, Redi-Dri(TM), ACS reagent, >=97%
    • Sodium nitrite, puriss. p.a., ACS reagent, reag. Ph. Eur., >=99%
    • Reagecon Nitrite (Sodium Nitrite) 100 microg/mL Stock Solution in Water according to Chinese Pharmacopoeia (ChP)
    • 7632-00-0

  • Applications

    Sodium nitrite is commonly used in the food-processing industry as a curing agent and color fixative for processed meats, helping preserve texture and impart a characteristic pink color while inhibiting spoilage; in the chemical industry as an intermediate for diazotization to form diazonium salts, enabling synthesis of azo dyes, pigments, and related coatings and inks; as a corrosion inhibitor in industrial cooling water systems and as an anti-corrosion additive in reinforced concrete to protect steel reinforcements from rust; in pharmaceutical and fine-chemical manufacturing as a reagent for nitrosation and other transformations, serving as a building block for various intermediates; and as a general nitrite source in organic synthesis, illustrating its role as a versatile chemical building block.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 50.75
    methanol 102.47
    isopropanol 42.62
    water 47.61
    ethyl acetate 15.93
    n-propanol 33.78
    acetone 55.49
    n-butanol 27.37
    acetonitrile 29.24
    DMF 534.1
    toluene 5.3
    isobutanol 24.56
    1,4-dioxane 51.05
    methyl acetate 27.45
    THF 68.44
    2-butanone 26.68
    n-pentanol 18.89
    sec-butanol 26.85
    n-hexane 1.25
    ethylene glycol 67.08
    NMP 196.19
    cyclohexane 1.43
    DMSO 368.61
    n-butyl acetate 9.63
    n-octanol 11.5
    chloroform 6.17
    n-propyl acetate 11.26
    acetic acid 54.68
    dichloromethane 11.43
    cyclohexanone 25.2
    propylene glycol 44.87
    isopropyl acetate 10.97
    DMAc 289.79
    2-ethoxyethanol 53.12
    isopentanol 22.99
    n-heptane 1.62
    ethyl formate 25.97
    1,2-dichloroethane 13.06
    n-hexanol 13.32
    2-methoxyethanol 120.77
    isobutyl acetate 6.27
    tetrachloromethane 2.05
    n-pentyl acetate 9.39
    transcutol 62.0
    n-heptanol 11.03
    ethylbenzene 3.03
    MIBK 13.47
    2-propoxyethanol 40.18
    tert-butanol 54.78
    MTBE 24.65
    2-butoxyethanol 27.55
    propionic acid 31.83
    o-xylene 6.86
    formic acid 82.44
    diethyl ether 17.96
    m-xylene 5.18
    p-xylene 4.21
    chlorobenzene 5.0
    dimethyl carbonate 33.4
    n-octane 0.8
    formamide 107.56
    cyclopentanone 42.01
    2-pentanone 20.48
    anisole 14.87
    cyclopentyl methyl ether 21.68
    gamma-butyrolactone 51.89
    1-methoxy-2-propanol 78.41
    pyridine 29.77
    3-pentanone 15.79
    furfural 61.95
    n-dodecane 0.96
    diethylene glycol 56.69
    diisopropyl ether 5.18
    tert-amyl alcohol 35.77
    acetylacetone 24.92
    n-hexadecane 1.0
    acetophenone 15.56
    methyl propionate 26.92
    isopentyl acetate 8.52
    trichloroethylene 14.02
    n-nonanol 10.88
    cyclohexanol 17.5
    benzyl alcohol 17.35
    2-ethylhexanol 7.62
    isooctanol 8.7
    dipropyl ether 9.8
    1,2-dichlorobenzene 5.32
    ethyl lactate 16.24
    propylene carbonate 23.71
    n-methylformamide 140.67
    2-pentanol 17.14
    n-pentane 1.91
    1-propoxy-2-propanol 27.34
    1-methoxy-2-propyl acetate 16.77
    2-(2-methoxypropoxy) propanol 29.76
    mesitylene 4.07
    ε-caprolactone 23.58
    p-cymene 3.53
    epichlorohydrin 43.8
    1,1,1-trichloroethane 5.35
    2-aminoethanol 66.85
    morpholine-4-carbaldehyde 149.2
    sulfolane 87.24
    2,2,4-trimethylpentane 1.5
    2-methyltetrahydrofuran 30.34
    n-hexyl acetate 11.92
    isooctane 1.09
    2-(2-butoxyethoxy)ethanol 36.07
    sec-butyl acetate 6.8
    tert-butyl acetate 13.37
    decalin 0.99
    glycerin 79.14
    diglyme 61.22
    acrylic acid 41.59
    isopropyl myristate 6.75
    n-butyric acid 25.18
    acetyl acetate 10.12
    di(2-ethylhexyl) phthalate 9.87
    ethyl propionate 12.08
    nitromethane 98.56
    1,2-diethoxyethane 15.93
    benzonitrile 12.84
    trioctyl phosphate 8.05
    1-bromopropane 6.69
    gamma-valerolactone 69.3
    n-decanol 9.09
    triethyl phosphate 7.71
    4-methyl-2-pentanol 10.6
    propionitrile 19.84
    vinylene carbonate 24.66
    1,1,2-trichlorotrifluoroethane 53.72
    DMS 15.07
    cumene 3.03
    2-octanol 7.88
    2-hexanone 12.48
    octyl acetate 9.49
    limonene 5.15
    1,2-dimethoxyethane 80.62
    ethyl orthosilicate 6.92
    tributyl phosphate 8.03
    diacetone alcohol 29.38
    N,N-dimethylaniline 17.62
    acrylonitrile 32.64
    aniline 16.31
    1,3-propanediol 57.36
    bromobenzene 3.26
    dibromomethane 6.46
    1,1,2,2-tetrachloroethane 13.96
    2-methyl-cyclohexyl acetate 7.64
    tetrabutyl urea 15.19
    diisobutyl methanol 5.89
    2-phenylethanol 12.3
    styrene 4.01
    dioctyl adipate 10.8
    dimethyl sulfate 66.23
    ethyl butyrate 8.84
    methyl lactate 37.99
    butyl lactate 13.44
    diethyl carbonate 7.27
    propanediol butyl ether 30.49
    triethyl orthoformate 8.41
    p-tert-butyltoluene 3.86
    methyl 4-tert-butylbenzoate 20.42
    morpholine 65.84
    tert-butylamine 25.13
    n-dodecanol 7.44
    dimethoxymethane 115.78
    ethylene carbonate 19.07
    cyrene 29.67
    2-ethoxyethyl acetate 14.49
    2-ethylhexyl acetate 6.56
    1,2,4-trichlorobenzene 7.13
    4-methylpyridine 28.47
    dibutyl ether 7.28
    2,6-dimethyl-4-heptanol 5.89
    DEF 59.16
    dimethyl isosorbide 33.73
    tetrachloroethylene 10.26
    eugenol 24.48
    triacetin 15.15
    span 80 23.63
    1,4-butanediol 28.98
    1,1-dichloroethane 7.92
    2-methyl-1-pentanol 15.3
    methyl formate 91.33
    2-methyl-1-butanol 21.69
    n-decane 1.18
    butyronitrile 17.93
    3,7-dimethyl-1-octanol 9.31
    1-chlorooctane 3.42
    1-chlorotetradecane 2.24
    n-nonane 1.06
    undecane 1.05
    tert-butylcyclohexane 1.1
    cyclooctane 0.74
    cyclopentanol 25.73
    tetrahydropyran 23.17
    tert-amyl methyl ether 20.58
    2,5,8-trioxanonane 51.34
    1-hexene 3.7
    2-isopropoxyethanol 31.01
    2,2,2-trifluoroethanol 34.97
    methyl butyrate 17.87

    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