Nitrogen

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  • Identifiers

    CAS number
    7727-37-9

    Molecular formula
    N2

    SMILES
    N#N

    Safety labels

    Compressed Gas
    Compressed Gas

  • Odor profile

    Fragrance
    Odorless 52.48%
    Pungent 23.63%
    Fishy 16.98%
    Bitter 15.64%
    Sharp 14.24%
    Burnt 13.5%
    Sulfurous 13.15%
    Floral 12.41%
    Almond 12.07%
    Sweet 11.72%

     

    Flavor
    Bitter 77.79%
    Odorless 32.96%
    Rotten 21.83%
    Formyl 20.93%
    Sulfur 20.33%
    Decomposing cabbage 18.75%
    Nitrile 18.56%
    Mousy 18.46%
    Shrimp 17.33%
    Pungent 16.97%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    0.1

    pKa est.
    2.09 (strong acid)

    Molecular weight
    28.014 g/mol

    Melting point expt.

    • -354 °F (USCG, 1999)
    • -210.01 °C (63.14K)
    • TRIPLE POINT TEMP: 63.1 DEG K; TRIPLE POINT PRESSURE: 0.127 ATM; HEAT OF FUSION: 6.1 CAL/G
    • -210.01 °C
    • -210 °C

    Boiling point

    • -320.1 °F at 760 mmHg (USCG, 1999)
    • -195.79 °C (77.36 K)
    • -196 °C

    Flash point

    • 59.87 ˚C est.

    Solubility expt.

    • In water, 1.81X10+4 mg/L at 21 °C
    • Insoluble in ethanol
    • Sparingly soluble in water: 100 vol water absorbs 2.4 vol nitrogen at 0 °C; 100 vol water absorbs 1.6 vol nitrogen at 20 °C /gas/
    • Slightly soluble in water and alcohol
    • For more Solubility (Complete) data for Nitrogen, Elemental (7 total), please visit the HSDB record page.
    • 18.1 mg/mL at 21 °C
    • Solubility in water: poor
    • Solubility in water: poor

  • Synonyms

    • Nitrogen
    • 7727-37-9
    • N
    • Nitrogen gas
    • Molecular nitrogen
    • Dinitrogen
    • Nitrogen-14
    • Nitrogeno
    • nitrogen molecule
    • Nitrogen (n2)
    • HSDB 5060
    • Diatomic nitrogen
    • Nitrogen, liquid
    • Nitrogen, compressed
    • INS NO.941
    • N2
    • CHEBI:17997
    • INS-941
    • UNII-N762921K75
    • DTXSID4036304
    • E-941
    • N762921K75
    • NITROGEN (II)
    • NITROGEN [II]
    • NITROGEN (MART.)
    • NITROGEN [MART.]
    • MOL Nitrogen
    • Azote [French]
    • Nitrogeno [Spanish]
    • NITROGEN (EP MONOGRAPH)
    • NITROGEN [EP MONOGRAPH]
    • Nitrogen [NF]
    • Nitrogen (liquified)
    • EINECS 231-783-9
    • UN1066
    • UN1977
    • nitrogencompressed
    • Nitrogen (TN)
    • Nitrogen, elemental
    • NITROGENNF
    • NITROGEN [HSDB]
    • NITROGEN [FCC]
    • NITROGEN [JAN]
    • NITROGEN [MI]
    • Nitrogen (JP18/NF)
    • NITROGEN [VANDF]
    • NITROGENCompressed, NF
    • NITROGEN [WHO-DD]
    • NITROGEN [GREEN BOOK]
    • Nitrogen, >=99.998%
    • Nitrogen, >=99.999%
    • CHEMBL142438
    • DTXCID6015504
    • DB09152
    • UN 1066
    • UN 1977
    • E941
    • Nitrogen, Messer(R) CANGas, 99.999%
    • NS00076303
    • C00697
    • D00083
    • Nitrogen Check Standard: N @ 50 ppm in Toluene
    • Nitrogen, refrigerated liquid (cryogenic liquid)
    • Nitrogen Check Standard: N @ 1 ppm in Isooctane
    • Nitrogen Calibration Set: 0-100 mg/L in Isooctane
    • Nitrogen Check Standard: N @ 10 ppm in Isooctane
    • Nitrogen Check Standard: N @ 50 ppm in Isooctane
    • Nitrogen, compressed [UN1066] [Nonflammable gas]
    • Nitrogenc70f6047-a0cb-4f70-aa3a-78acd681efc3
    • Q2370426
    • ASTM D4629 Calibration Set, N @ 0-100 mg/L in Isooctane
    • Nitrogen Set for ASTM D6366: N @ 10, 25, 50, 75, 100 ng/microL in Isooctane
    • Nitrogen, refrigerated liquid (cryogenic liquid) [UN1977] [Nonflammable gas]
    • 231-783-9
    • N#N
    • Nitrogen Set for ASTM D6366: N @ Blank, 0.1, 0.5, 1.0, 2.5, 5.0, 10 ng/microL in p-Xylene

  • Applications

    Nitrogen (CAS 7727-37-9) is an inert, non-reactive gas used as an inerting, shielding, and purge gas across industries to prevent oxidation and moisture uptake. Typical applications include inerting/blanketing in chemical processing and storage to prevent undesired reactions and degradation caused by oxygen; purge gas and protective atmosphere in the packaging of food, beverages, and pharmaceuticals to extend shelf life; shielding gas in metal fabrication and welding to minimize oxidation and surface discoloration; carrier gas and protective atmosphere in electronics and semiconductor manufacturing for processes such as CVD, annealing, and plasma processing; inerting in polymer and plastics processing to prevent oxidative degradation during extrusion, molding, or foaming; purge gas in coatings, inks, and cleaning to prevent exposure to air and moisture during drying. Subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 20.95
    methanol 41.09
    isopropanol 15.35
    water 4.81
    ethyl acetate 25.79
    n-propanol 15.09
    acetone 69.71
    n-butanol 11.31
    acetonitrile 53.05
    DMF 229.92
    toluene 9.09
    isobutanol 11.3
    1,4-dioxane 51.83
    methyl acetate 43.03
    THF 52.94
    2-butanone 38.12
    n-pentanol 8.48
    sec-butanol 12.0
    n-hexane 3.34
    ethylene glycol 22.8
    NMP 177.08
    cyclohexane 5.01
    DMSO 182.81
    n-butyl acetate 15.31
    n-octanol 8.85
    chloroform 39.33
    n-propyl acetate 15.77
    acetic acid 50.97
    dichloromethane 40.01
    cyclohexanone 42.11
    propylene glycol 15.45
    isopropyl acetate 16.25
    DMAc 177.19
    2-ethoxyethanol 20.8
    isopentanol 9.47
    n-heptane 3.54
    ethyl formate 23.46
    1,2-dichloroethane 28.5
    n-hexanol 8.54
    2-methoxyethanol 45.01
    isobutyl acetate 9.91
    tetrachloromethane 9.49
    n-pentyl acetate 11.92
    transcutol 49.24
    n-heptanol 6.4
    ethylbenzene 6.0
    MIBK 15.03
    2-propoxyethanol 20.55
    tert-butanol 19.52
    MTBE 19.23
    2-butoxyethanol 14.03
    propionic acid 32.11
    o-xylene 10.22
    formic acid 32.72
    diethyl ether 19.44
    m-xylene 7.05
    p-xylene 9.28
    chlorobenzene 17.58
    dimethyl carbonate 29.98
    n-octane 1.93
    formamide 50.9
    cyclopentanone 66.2
    2-pentanone 25.03
    anisole 17.78
    cyclopentyl methyl ether 23.68
    gamma-butyrolactone 82.83
    1-methoxy-2-propanol 31.7
    pyridine 42.5
    3-pentanone 26.95
    furfural 70.52
    n-dodecane 1.93
    diethylene glycol 25.39
    diisopropyl ether 7.57
    tert-amyl alcohol 15.36
    acetylacetone 40.52
    n-hexadecane 2.1
    acetophenone 21.07
    methyl propionate 32.59
    isopentyl acetate 12.95
    trichloroethylene 47.23
    n-nonanol 7.92
    cyclohexanol 12.81
    benzyl alcohol 13.13
    2-ethylhexanol 7.34
    isooctanol 5.6
    dipropyl ether 11.95
    1,2-dichlorobenzene 18.71
    ethyl lactate 13.23
    propylene carbonate 39.73
    n-methylformamide 68.97
    2-pentanol 8.38
    n-pentane 3.29
    1-propoxy-2-propanol 16.71
    1-methoxy-2-propyl acetate 20.53
    2-(2-methoxypropoxy) propanol 20.19
    mesitylene 6.02
    ε-caprolactone 34.66
    p-cymene 6.53
    epichlorohydrin 47.69
    1,1,1-trichloroethane 26.37
    2-aminoethanol 20.93
    morpholine-4-carbaldehyde 105.13
    sulfolane 113.91
    2,2,4-trimethylpentane 2.56
    2-methyltetrahydrofuran 34.49
    n-hexyl acetate 17.1
    isooctane 1.69
    2-(2-butoxyethoxy)ethanol 21.32
    sec-butyl acetate 10.66
    tert-butyl acetate 18.17
    decalin 3.0
    glycerin 28.12
    diglyme 48.33
    acrylic acid 43.1
    isopropyl myristate 9.06
    n-butyric acid 23.61
    acetyl acetate 24.54
    di(2-ethylhexyl) phthalate 9.63
    ethyl propionate 16.71
    nitromethane 117.15
    1,2-diethoxyethane 18.22
    benzonitrile 21.8
    trioctyl phosphate 7.54
    1-bromopropane 14.27
    gamma-valerolactone 74.16
    n-decanol 6.36
    triethyl phosphate 11.58
    4-methyl-2-pentanol 5.8
    propionitrile 26.53
    vinylene carbonate 36.2
    1,1,2-trichlorotrifluoroethane 50.95
    DMS 27.47
    cumene 5.45
    2-octanol 5.27
    2-hexanone 15.93
    octyl acetate 11.28
    limonene 9.49
    1,2-dimethoxyethane 42.94
    ethyl orthosilicate 9.93
    tributyl phosphate 9.04
    diacetone alcohol 22.72
    N,N-dimethylaniline 17.2
    acrylonitrile 43.81
    aniline 15.15
    1,3-propanediol 19.9
    bromobenzene 16.35
    dibromomethane 24.72
    1,1,2,2-tetrachloroethane 40.58
    2-methyl-cyclohexyl acetate 12.24
    tetrabutyl urea 14.89
    diisobutyl methanol 6.43
    2-phenylethanol 11.22
    styrene 8.85
    dioctyl adipate 14.01
    dimethyl sulfate 69.04
    ethyl butyrate 14.01
    methyl lactate 26.8
    butyl lactate 11.88
    diethyl carbonate 12.55
    propanediol butyl ether 15.76
    triethyl orthoformate 12.06
    p-tert-butyltoluene 6.5
    methyl 4-tert-butylbenzoate 19.73
    morpholine 48.62
    tert-butylamine 12.51
    n-dodecanol 5.51
    dimethoxymethane 58.16
    ethylene carbonate 28.44
    cyrene 25.54
    2-ethoxyethyl acetate 18.5
    2-ethylhexyl acetate 11.35
    1,2,4-trichlorobenzene 23.52
    4-methylpyridine 34.92
    dibutyl ether 10.36
    2,6-dimethyl-4-heptanol 6.43
    DEF 52.08
    dimethyl isosorbide 33.52
    tetrachloroethylene 28.34
    eugenol 18.21
    triacetin 24.69
    span 80 16.82
    1,4-butanediol 9.85
    1,1-dichloroethane 25.57
    2-methyl-1-pentanol 7.54
    methyl formate 55.21
    2-methyl-1-butanol 9.43
    n-decane 2.66
    butyronitrile 18.29
    3,7-dimethyl-1-octanol 7.98
    1-chlorooctane 6.9
    1-chlorotetradecane 4.05
    n-nonane 2.66
    undecane 2.19
    tert-butylcyclohexane 2.78
    cyclooctane 2.15
    cyclopentanol 19.8
    tetrahydropyran 28.12
    tert-amyl methyl ether 16.35
    2,5,8-trioxanonane 38.17
    1-hexene 6.65
    2-isopropoxyethanol 14.28
    2,2,2-trifluoroethanol 29.35
    methyl butyrate 22.29

    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