Potassium cyanate

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  • Identifiers

    CAS number
    590-28-3

    Molecular formula
    CKNO

    SMILES
    C(#N)[O-].[K+]

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 52.73%
    Floral 27.65%
    Bitter 16.85%
    Animal 16.32%
    Fishy 15.49%
    Dry 15.03%
    Pungent 15.02%
    Sweet 14.97%
    Sharp 14.51%
    Clean 13.67%

     

    Flavor
    Bitter 54.06%
    Odorless 43.06%
    Rotten 19.58%
    Formyl 19.56%
    Nitrile 19.38%
    Mousy 18.64%
    Mild 18.59%
    Decomposing cabbage 17.62%
    Bread crust 17.31%
    Urine 17.28%

     

    Odor impact est.
    High

  • Properties

    pKa est.
    2.44 (strong acid)

    Molecular weight
    81.115 g/mol

    Melting point expt.

    • 315 °C

    Flash point

    • 36.57 ˚C est.

    Solubility expt.

    • Very slightly sol in alcohol
    • In water, 6.3X10+5 mg/L @ 10 °C

  • Synonyms

    • POTASSIUM CYANATE
    • 590-28-3
    • Aero cyanate
    • Cyanic acid, potassium salt
    • Alicyanate
    • Kaliumcyanat
    • KOCN
    • Bulpur
    • Potassium isocyanate
    • Weedanol cyanol
    • Potassium cyanate (KCNO)
    • Aero cyanate weedkiller
    • Miller P.C. weedkiller
    • Ded-weed crabgrass killer
    • Weedone Crab Grass Killer
    • Potassium cyanate (KOCN)
    • Dupont PC crabgrass killer
    • Bonide krab crabgrass killer
    • Green cross crabgrass killer
    • P.C. 80 crabgrass killer
    • D & P Double O Crabgrass Killer
    • G9C31TWN5M
    • Cyanic acid, potassium salt (1:1)
    • DTXSID2047692
    • CHEBI:38904
    • NSC-146178
    • KCNO
    • KNCO
    • RefChem:175451
    • DTXCID0027692
    • 209-676-3
    • Potassiumcyanate
    • potassium;cyanate
    • CKNO
    • MFCD00011411
    • Isocyanic acid potassium salt
    • Caswell No. 688
    • Kaliumcyanat [German]
    • D&P double O Crabgrass killer
    • HSDB 1757
    • EINECS 209-676-3
    • UNII-G9C31TWN5M
    • EPA Pesticide Chemical Code 068002
    • NSC 146178
    • Kaliumzyanat
    • AI3-28750
    • potassium-cyanate
    • EC 209-676-3
    • SCHEMBL73963
    • POTASSIUM CYANATE [MI]
    • CHEMBL4079232
    • POTASSIUM CYANATE [HSDB]
    • AKOS015833743
    • 590-23-8
    • FP138901
    • SY006099
    • DB-002859
    • DB-210141
    • CS-0017815
    • NS00013993
    • C19067
    • D78243
    • Q416304
    • 590-28-3

  • Applications

    Potassium cyanate (CAS 590-28-3) is a versatile chemical intermediate used in organic synthesis and polymer chemistry. It serves as a precursor to isocyanates and urethane (carbamate) derivatives, enabling polyurethane crosslinking and related materials. It is a feedstock for cyanate ester chemistry, providing monomers for high-temperature resins and coatings. It also functions as a cyanating reagent to introduce cyanate groups into substrates, supporting the synthesis of heterocycles and pharmaceutical intermediates. In research and development, it is commonly evaluated as a laboratory-scale reagent for cyanation steps and catalyst development, with use governed by local regulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 86.27
    methanol 189.86
    isopropanol 66.62
    water 104.31
    ethyl acetate 45.63
    n-propanol 54.24
    acetone 169.25
    n-butanol 37.74
    acetonitrile 126.32
    DMF 974.9
    toluene 11.45
    isobutanol 37.17
    1,4-dioxane 119.11
    methyl acetate 94.22
    THF 119.5
    2-butanone 72.91
    n-pentanol 26.15
    sec-butanol 41.33
    n-hexane 2.9
    ethylene glycol 142.53
    NMP 444.48
    cyclohexane 5.81
    DMSO 682.0
    n-butyl acetate 20.79
    n-octanol 17.83
    chloroform 27.9
    n-propyl acetate 25.86
    acetic acid 155.19
    dichloromethane 41.96
    cyclohexanone 62.94
    propylene glycol 71.15
    isopropyl acetate 25.29
    DMAc 627.72
    2-ethoxyethanol 85.36
    isopentanol 27.55
    n-heptane 4.62
    ethyl formate 55.86
    1,2-dichloroethane 41.74
    n-hexanol 20.42
    2-methoxyethanol 186.19
    isobutyl acetate 14.21
    tetrachloromethane 9.23
    n-pentyl acetate 18.96
    transcutol 103.17
    n-heptanol 15.9
    ethylbenzene 5.47
    MIBK 23.63
    2-propoxyethanol 61.19
    tert-butanol 77.05
    MTBE 49.53
    2-butoxyethanol 39.8
    propionic acid 80.28
    o-xylene 13.02
    formic acid 220.4
    diethyl ether 43.96
    m-xylene 9.12
    p-xylene 8.83
    chlorobenzene 15.63
    dimethyl carbonate 80.85
    n-octane 2.34
    formamide 296.27
    cyclopentanone 100.37
    2-pentanone 43.27
    anisole 26.09
    cyclopentyl methyl ether 42.6
    gamma-butyrolactone 124.05
    1-methoxy-2-propanol 107.8
    pyridine 77.3
    3-pentanone 44.97
    furfural 146.16
    n-dodecane 2.34
    diethylene glycol 93.43
    diisopropyl ether 12.36
    tert-amyl alcohol 50.35
    acetylacetone 61.44
    n-hexadecane 2.47
    acetophenone 31.08
    methyl propionate 67.52
    isopentyl acetate 15.48
    trichloroethylene 54.17
    n-nonanol 15.68
    cyclohexanol 31.03
    benzyl alcohol 28.05
    2-ethylhexanol 12.0
    isooctanol 12.3
    dipropyl ether 20.55
    1,2-dichlorobenzene 15.56
    ethyl lactate 30.68
    propylene carbonate 53.74
    n-methylformamide 313.62
    2-pentanol 24.55
    n-pentane 4.99
    1-propoxy-2-propanol 41.33
    1-methoxy-2-propyl acetate 32.94
    2-(2-methoxypropoxy) propanol 42.84
    mesitylene 7.47
    ε-caprolactone 51.29
    p-cymene 6.93
    epichlorohydrin 83.43
    1,1,1-trichloroethane 22.66
    2-aminoethanol 108.54
    morpholine-4-carbaldehyde 314.27
    sulfolane 198.34
    2,2,4-trimethylpentane 3.16
    2-methyltetrahydrofuran 63.6
    n-hexyl acetate 22.61
    isooctane 2.19
    2-(2-butoxyethoxy)ethanol 49.35
    sec-butyl acetate 14.52
    tert-butyl acetate 26.16
    decalin 2.45
    glycerin 142.24
    diglyme 107.73
    acrylic acid 113.28
    isopropyl myristate 11.27
    n-butyric acid 49.46
    acetyl acetate 32.91
    di(2-ethylhexyl) phthalate 14.93
    ethyl propionate 25.11
    nitromethane 352.85
    1,2-diethoxyethane 30.95
    benzonitrile 31.89
    trioctyl phosphate 12.55
    1-bromopropane 17.38
    gamma-valerolactone 141.64
    n-decanol 12.9
    triethyl phosphate 15.85
    4-methyl-2-pentanol 14.26
    propionitrile 55.22
    vinylene carbonate 57.53
    1,1,2-trichlorotrifluoroethane 121.22
    DMS 36.84
    cumene 5.15
    2-octanol 11.42
    2-hexanone 24.54
    octyl acetate 16.25
    limonene 11.0
    1,2-dimethoxyethane 129.36
    ethyl orthosilicate 13.84
    tributyl phosphate 13.01
    diacetone alcohol 45.26
    N,N-dimethylaniline 30.26
    acrylonitrile 92.64
    aniline 31.74
    1,3-propanediol 87.0
    bromobenzene 11.1
    dibromomethane 23.82
    1,1,2,2-tetrachloroethane 48.58
    2-methyl-cyclohexyl acetate 14.36
    tetrabutyl urea 25.71
    diisobutyl methanol 9.62
    2-phenylethanol 19.01
    styrene 8.24
    dioctyl adipate 19.82
    dimethyl sulfate 165.82
    ethyl butyrate 19.03
    methyl lactate 74.87
    butyl lactate 23.14
    diethyl carbonate 15.84
    propanediol butyl ether 43.42
    triethyl orthoformate 17.15
    p-tert-butyltoluene 7.59
    methyl 4-tert-butylbenzoate 33.54
    morpholine 132.59
    tert-butylamine 42.17
    n-dodecanol 11.02
    dimethoxymethane 207.25
    ethylene carbonate 44.59
    cyrene 46.81
    2-ethoxyethyl acetate 31.4
    2-ethylhexyl acetate 12.61
    1,2,4-trichlorobenzene 21.42
    4-methylpyridine 63.2
    dibutyl ether 14.03
    2,6-dimethyl-4-heptanol 9.62
    DEF 123.41
    dimethyl isosorbide 53.13
    tetrachloroethylene 38.53
    eugenol 37.7
    triacetin 35.72
    span 80 35.39
    1,4-butanediol 45.29
    1,1-dichloroethane 27.62
    2-methyl-1-pentanol 18.84
    methyl formate 220.83
    2-methyl-1-butanol 28.43
    n-decane 3.16
    butyronitrile 39.36
    3,7-dimethyl-1-octanol 13.79
    1-chlorooctane 8.42
    1-chlorotetradecane 4.95
    n-nonane 3.06
    undecane 2.64
    tert-butylcyclohexane 2.3
    cyclooctane 2.3
    cyclopentanol 49.97
    tetrahydropyran 53.3
    tert-amyl methyl ether 38.55
    2,5,8-trioxanonane 83.57
    1-hexene 7.32
    2-isopropoxyethanol 48.42
    2,2,2-trifluoroethanol 105.35
    methyl butyrate 36.64

    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