Cyanogen

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  • Identifiers

    CAS number
    460-19-5

    Molecular formula
    C2N2

    SMILES
    C(#N)C#N

    Safety labels

    Flammable
    Flammable

    Compressed Gas
    Compressed Gas

    Acute Toxic
    Acute Toxic

    Environmental Hazard
    Environmental

  • Odor profile

    Sweet 26.84%
    Floral 26.6%
    Pungent 24.48%
    Odorless 20.74%
    Spicy 18.87%
    Burnt 17.96%
    Bitter 16.43%
    Sulfurous 15.6%
    Fishy 14.9%
    Geranium 14.46%

    Scent© AI

    Odor threshold>

    • Odor threshold is >250 ppm
    • Odor & irritation threshold detection tests on humans indicated no odor up to 250 ppm ...
    • Odor threshold is 500 mg/cu m; Irritation concentration is 32 mg/cu m.

  • Properties

    XLogP3-AA
    0.1

    Molecular weight
    52.03 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Melting point expt.

    • -18.2 °F (USCG, 1999)
    • -27.83 °C
    • Burns with a pink flame having a bluish border. MP: -27.9 °C (also reported as -34.4 °C). Above 500 °C polymerizes to insoluble paracyanogen (CN)n. One volume of water dissolves about 4 volumes of cyanogen gas. ... Slowly hydrolyzed in aqueous solution giving oxilic acid and ammonia.
    • -27.9 °C
    • -18 °F

    Boiling point

    • -6.1 °F at 760 mmHg (USCG, 1999)
    • -21.1 °C
    • -21.2 °C
    • -6 °F

    Flash point est.
    37.93 ˚C

    Flash point expt.

    • Flammable gas
    • NA (Gas)

    Solubility expt.

    • 1 % (NIOSH, 2024)
    • Soluble in ethanol, ethyl ether
    • Solubility at 20 °C: water dissolves 4.5 times its own volume of cyanogen; diethyl ether, 5.0 times; and ethanol, 23.0 times
    • 450 CC IN 100 ML WATER @ 20 °C
    • 2300 cc in 100 ml ethyl alcohol @ 20 °C
    • For more Solubility (Complete) data for CYANOGEN (7 total), please visit the HSDB record page.
    • Solubility in water, ml/100ml at 20 °C: 450
    • 1%

  • Synonyms

    • CYANOGEN
    • Oxalonitrile
    • Ethanedinitrile
    • Dicyan
    • Carbon nitride
    • Dicyanogen
    • Nitriloacetonitrile
    • Oxalyl cyanide
    • Oxalic acid dinitrile
    • Prussite
    • 460-19-5
    • Cyanogene
    • Oxalic nitrile
    • Cyanogen (C2N2)
    • Carbon nitride (C2N2)
    • Cyanogene [French]
    • NCCN
    • RCRA waste number P031
    • (CN)2
    • Cyanogen gas
    • HSDB 2130
    • bis(nitridocarbon)(C--C)
    • EINECS 207-306-5
    • C2N2
    • 534Q0F66RK
    • CYANOGEN [HSDB]
    • CYANOGEN [MI]
    • DTXSID1023992
    • CHEBI:29308
    • EC 207-306-5
    • CYANOGENE (FRENCH)
    • carbononitridic cyanide
    • UN1026
    • RCRA waste no. P031
    • UNII-534Q0F66RK
    • ethane dinitrile
    • CYANOGEN, GAS
    • Ethanedinitrile (9CI)
    • Cyanogen (ACGIH:OSHA)
    • CYANOGEN, LIQUEFIED
    • N C C N
    • DTXCID603992
    • Cyanogen [UN1026] [Poison gas]
    • UN 1026
    • bis(nitridocarbon)(C--C);ethanedinitrile
    • NS00043588
    • Q421724
    • 207-306-5

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 8.81
    methanol 16.38
    isopropanol 5.81
    water 1.8
    ethyl acetate 21.55
    n-propanol 6.15
    acetone 59.45
    n-butanol 4.6
    acetonitrile 43.21
    DMF 130.5
    toluene 6.6
    isobutanol 4.11
    1,4-dioxane 39.92
    methyl acetate 39.35
    THF 45.66
    2-butanone 27.97
    n-pentanol 4.3
    sec-butanol 4.44
    n-hexane 1.61
    ethylene glycol 12.92
    NMP 149.72
    cyclohexane 5.41
    DMSO 193.91
    n-butyl acetate 19.39
    n-octanol 6.11
    chloroform 27.77
    n-propyl acetate 15.53
    acetic acid 37.53
    dichloromethane 39.38
    cyclohexanone 37.9
    propylene glycol 6.06
    isopropyl acetate 12.23
    DMAc 111.01
    2-ethoxyethanol 15.75
    isopentanol 4.12
    n-heptane 3.77
    ethyl formate 21.43
    1,2-dichloroethane 31.82
    n-hexanol 5.59
    2-methoxyethanol 28.07
    isobutyl acetate 7.94
    tetrachloromethane 8.1
    n-pentyl acetate 12.69
    transcutol 57.13
    n-heptanol 4.25
    ethylbenzene 4.11
    MIBK 9.43
    2-propoxyethanol 16.19
    tert-butanol 7.54
    MTBE 8.81
    2-butoxyethanol 11.64
    propionic acid 18.93
    o-xylene 7.07
    formic acid 24.41
    diethyl ether 12.18
    m-xylene 4.32
    p-xylene 6.78
    chlorobenzene 15.07
    dimethyl carbonate 22.02
    n-octane 1.79
    formamide 51.16
    cyclopentanone 56.05
    2-pentanone 17.17
    anisole 13.27
    cyclopentyl methyl ether 17.02
    gamma-butyrolactone 76.17
    1-methoxy-2-propanol 17.36
    pyridine 41.44
    3-pentanone 20.14
    furfural 81.76
    n-dodecane 1.54
    diethylene glycol 20.37
    diisopropyl ether 4.47
    tert-amyl alcohol 5.72
    acetylacetone 36.89
    n-hexadecane 1.79
    acetophenone 20.32
    methyl propionate 24.42
    isopentyl acetate 14.1
    trichloroethylene 51.02
    n-nonanol 5.58
    cyclohexanol 7.36
    benzyl alcohol 9.92
    2-ethylhexanol 5.33
    isooctanol 3.74
    dipropyl ether 12.32
    1,2-dichlorobenzene 18.26
    ethyl lactate 11.05
    propylene carbonate 37.32
    n-methylformamide 51.89
    2-pentanol 3.67
    n-pentane 1.73
    1-propoxy-2-propanol 13.97
    1-methoxy-2-propyl acetate 21.78
    2-(2-methoxypropoxy) propanol 18.17
    mesitylene 3.98
    ε-caprolactone 33.45
    p-cymene 6.27
    epichlorohydrin 47.04
    1,1,1-trichloroethane 22.65
    2-aminoethanol 9.54
    morpholine-4-carbaldehyde 91.23
    sulfolane 126.97
    2,2,4-trimethylpentane 0.93
    2-methyltetrahydrofuran 26.36
    n-hexyl acetate 16.27
    isooctane 0.73
    2-(2-butoxyethoxy)ethanol 20.16
    sec-butyl acetate 8.53
    tert-butyl acetate 12.9
    decalin 1.9
    glycerin 14.33
    diglyme 54.97
    acrylic acid 26.85
    isopropyl myristate 8.07
    n-butyric acid 13.53
    acetyl acetate 25.19
    di(2-ethylhexyl) phthalate 8.61
    ethyl propionate 14.41
    nitromethane 126.28
    1,2-diethoxyethane 22.99
    benzonitrile 21.66
    trioctyl phosphate 6.71
    1-bromopropane 11.17
    gamma-valerolactone 66.37
    n-decanol 4.63
    triethyl phosphate 11.75
    4-methyl-2-pentanol 2.64
    propionitrile 19.81
    vinylene carbonate 34.5
    1,1,2-trichlorotrifluoroethane 49.26
    DMS 29.41
    cumene 3.41
    2-octanol 3.59
    2-hexanone 14.08
    octyl acetate 10.35
    limonene 9.35
    1,2-dimethoxyethane 39.79
    ethyl orthosilicate 9.67
    tributyl phosphate 8.6
    diacetone alcohol 16.25
    N,N-dimethylaniline 13.08
    acrylonitrile 34.63
    aniline 10.7
    1,3-propanediol 9.84
    bromobenzene 14.87
    dibromomethane 22.95
    1,1,2,2-tetrachloroethane 39.24
    2-methyl-cyclohexyl acetate 12.18
    tetrabutyl urea 15.33
    diisobutyl methanol 4.72
    2-phenylethanol 9.81
    styrene 6.45
    dioctyl adipate 14.88
    dimethyl sulfate 55.16
    ethyl butyrate 17.17
    methyl lactate 19.37
    butyl lactate 11.47
    diethyl carbonate 14.44
    propanediol butyl ether 11.6
    triethyl orthoformate 13.86
    p-tert-butyltoluene 5.76
    methyl 4-tert-butylbenzoate 17.83
    morpholine 34.98
    tert-butylamine 4.96
    n-dodecanol 4.06
    dimethoxymethane 37.76
    ethylene carbonate 24.8
    cyrene 21.27
    2-ethoxyethyl acetate 21.21
    2-ethylhexyl acetate 12.44
    1,2,4-trichlorobenzene 23.23
    4-methylpyridine 28.94
    dibutyl ether 10.58
    2,6-dimethyl-4-heptanol 4.72
    DEF 37.39
    dimethyl isosorbide 37.84
    tetrachloroethylene 29.86
    eugenol 16.43
    triacetin 27.18
    span 80 13.36
    1,4-butanediol 5.67
    1,1-dichloroethane 18.51
    2-methyl-1-pentanol 3.75
    methyl formate 46.72
    2-methyl-1-butanol 3.6
    n-decane 2.22
    butyronitrile 12.27
    3,7-dimethyl-1-octanol 6.07
    1-chlorooctane 6.13
    1-chlorotetradecane 3.26
    n-nonane 2.27
    undecane 1.82
    tert-butylcyclohexane 1.34
    cyclooctane 2.1
    cyclopentanol 10.6
    tetrahydropyran 21.59
    tert-amyl methyl ether 7.67
    2,5,8-trioxanonane 40.25
    1-hexene 3.47
    2-isopropoxyethanol 10.64
    2,2,2-trifluoroethanol 23.3
    methyl butyrate 20.26

    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