Hexazinone

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  • Identifiers

    CAS number
    51235-04-2

    Molecular formula
    C12H20N4O2

    SMILES
    CN1C(=NC(=O)N(C1=O)C2CCCCC2)N(C)C

    Safety labels

    Irritant
    Irritant

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Odorless 34.12%
    Animal 26.42%
    Mint 22.38%
    Bitter 21.75%
    Musty 21.25%
    Herbal 20.48%
    Cooling 20.04%
    Nutty 18.17%
    Roasted 17.89%
    Earthy 17.56%

     

    Flavor
    Bitter 75.43%
    Odorless 26.24%
    Cedarleaf 20.85%
    Lovage 19.48%
    Nitrile 19.3%
    Carrot 19.3%
    Green pepper 19.07%
    Parsley 19.04%
    Bread crust 18.98%
    Broom 18.97%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    1.3

    pKa est.
    4.98 (weak acid)

    Molecular weight
    252.31 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Slow

    Melting point expt.

    • 117.2 °C

    Boiling point

    • Decomposes

    Flash point

    • 187.21 ˚C est.

    Solubility expt.

    • In water, 3.3X10+4 mg/L at 25 °C
    • At 25 °C (g/kg): chloroform 3880, methanol 2650, benzene 940, dimethylformamide 836, acetone 792, toluene 386, hexane 3

  • Synonyms

    • HEXAZINONE
    • 51235-04-2
    • Velpar
    • 3-Cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione
    • Velpar L
    • Velpar weed killer
    • Hexazinon
    • Hexazinone [ISO]
    • 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4-dione
    • 1,3,5-Triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(dimethylamino)-1-methyl-
    • Hexazinone [ANSI:BSI:ISO]
    • CCRIS 5273
    • HSDB 6670
    • DPX 3674
    • EINECS 257-074-4
    • UNII-Y51727MR1Y
    • BRN 0618801
    • CHEBI:5705
    • DTXSID4024145
    • Y51727MR1Y
    • HEXAZINONE [MI]
    • HEXAZINONE [HSDB]
    • 3-Cyclohexyl-1-methyl-6-(dimethylamino)-s-trazine-2,4(1H,3H)-dione
    • DTXCID804145
    • Brushkiller
    • 3-Cyclohexyl-6-(dimethylamino)-1-methyl-s-triazine-2,4(1H,3H)-dione
    • 5-26-10-00171 (Beilstein Handbook Reference)
    • DPX-3674
    • 3-Cyclohexyl-6-dimethylamino-1-methyl-1,2,3,4-tetrahydro-1,3,5-triazine-2,4-dione
    • Hexazinone 10 microg/mL in Acetonitrile
    • Gridball
    • Hexazinone 100 microg/mL in Acetonitrile
    • s-Triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(dimethylamino)-1-methyl-
    • Hexazinone (ANSI:BSI:ISO)
    • Caswell No. 271AA
    • 3-Cyclohexy-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione
    • 3-cyclohexyl-6-dimethylamino-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione
    • CAS-51235-04-2
    • EPA Pesticide Chemical Code 107201
    • SHA 107201
    • ELINONE
    • SENTAI
    • SCHEMBL66377
    • CHEMBL2252598
    • HY-B1849
    • Tox21_201665
    • Tox21_300745
    • BDBM50487023
    • AKOS015914992
    • Hexazinone 1000 microg/mL in Toluene
    • NCGC00164460-01
    • NCGC00168317-01
    • NCGC00168317-02
    • NCGC00168317-03
    • NCGC00254651-01
    • NCGC00259214-01
    • AC-16229
    • BS-32507
    • FH178904
    • DB-051928
    • CS-0013917
    • H1686
    • NS00000457
    • Hexazinone, PESTANAL(R), analytical standard
    • A12586
    • A828499
    • Q408234
    • 3Cyclohexyl1methyl6(dimethylamino)strazine2,4(1H,3H)dione
    • 3Cyclohexyl6(dimethylamino)1methylstriazine2,4(1H,3H)dione
    • 1-methyl-3-cyclohexyl-6-dimethylamino-s-triazine-2,4(1H,3H)-dione
    • 3Cyclohexyl6(dimethylamino)1methyl1,3,5triazine2,4(1H,3H)dione
    • s-Triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(dimethylamino)-1-methyl-;
    • 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,2,3,4-tetrahydro-1,3,5-triazine-2,4-dione
    • 3-Cyclohexyl-6-dimethylamino-1-methyl-1,2,3,4-tetrahydro-1,3,5-triazine-2-,4-dione

  • Applications

    Hexazinone (CAS 51235-04-2) is a selective systemic herbicide used primarily in agriculture and forestry to control a broad spectrum of annual grasses and broadleaf weeds. It is applied as a pre-emergence or post-emergence treatment in crops such as sugarcane and is used for site preparation and vegetation management in forestry to reduce competing vegetation before planting. It also serves in non-crop vegetation control programs, including rights-of-way, rail corridors, and industrial sites, where selective weed control is required. In formulation or tank-mix programs, hexazinone is combined with other herbicides to extend spectrum and manage weed resistance, with use governed by label directions and local regulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 50.35
    methanol 62.59
    isopropanol 33.79
    water 1.27
    ethyl acetate 45.48
    n-propanol 40.14
    acetone 60.93
    n-butanol 38.94
    acetonitrile 38.19
    DMF 164.4
    toluene 29.04
    isobutanol 34.37
    1,4-dioxane 73.36
    methyl acetate 57.14
    THF 129.26
    2-butanone 57.77
    n-pentanol 26.34
    sec-butanol 33.74
    n-hexane 0.47
    ethylene glycol 37.6
    NMP 215.19
    cyclohexane 1.89
    DMSO 111.01
    n-butyl acetate 33.48
    n-octanol 5.04
    chloroform 324.1
    n-propyl acetate 22.08
    acetic acid 157.72
    dichloromethane 282.49
    cyclohexanone 121.6
    propylene glycol 42.27
    isopropyl acetate 28.12
    DMAc 159.22
    2-ethoxyethanol 54.25
    isopentanol 37.33
    n-heptane 0.32
    ethyl formate 69.49
    1,2-dichloroethane 149.32
    n-hexanol 24.51
    2-methoxyethanol 137.14
    isobutyl acetate 17.0
    tetrachloromethane 26.29
    n-pentyl acetate 20.8
    transcutol 41.78
    n-heptanol 10.66
    ethylbenzene 8.97
    MIBK 25.36
    2-propoxyethanol 72.53
    tert-butanol 31.74
    MTBE 15.71
    2-butoxyethanol 39.61
    propionic acid 72.77
    o-xylene 16.95
    formic acid 118.19
    diethyl ether 12.44
    m-xylene 15.86
    p-xylene 15.44
    chlorobenzene 75.54
    dimethyl carbonate 37.78
    n-octane 0.19
    formamide 133.91
    cyclopentanone 157.69
    2-pentanone 40.98
    anisole 19.14
    cyclopentyl methyl ether 31.44
    gamma-butyrolactone 213.21
    1-methoxy-2-propanol 74.45
    pyridine 149.0
    3-pentanone 29.01
    furfural 258.11
    n-dodecane 0.2
    diethylene glycol 89.17
    diisopropyl ether 3.37
    tert-amyl alcohol 33.12
    acetylacetone 65.64
    n-hexadecane 0.24
    acetophenone 37.22
    methyl propionate 45.34
    isopentyl acetate 34.93
    trichloroethylene 419.54
    n-nonanol 5.09
    cyclohexanol 45.87
    benzyl alcohol 49.99
    2-ethylhexanol 12.47
    isooctanol 9.01
    dipropyl ether 4.91
    1,2-dichlorobenzene 68.45
    ethyl lactate 27.0
    propylene carbonate 136.03
    n-methylformamide 106.25
    2-pentanol 18.35
    n-pentane 0.65
    1-propoxy-2-propanol 35.03
    1-methoxy-2-propyl acetate 42.0
    2-(2-methoxypropoxy) propanol 28.02
    mesitylene 7.98
    ε-caprolactone 114.04
    p-cymene 7.0
    epichlorohydrin 262.5
    1,1,1-trichloroethane 105.15
    2-aminoethanol 52.67
    morpholine-4-carbaldehyde 155.48
    sulfolane 216.3
    2,2,4-trimethylpentane 0.79
    2-methyltetrahydrofuran 74.72
    n-hexyl acetate 19.46
    isooctane 0.44
    2-(2-butoxyethoxy)ethanol 32.76
    sec-butyl acetate 15.57
    tert-butyl acetate 25.22
    decalin 1.2
    glycerin 84.56
    diglyme 54.82
    acrylic acid 106.43
    isopropyl myristate 5.77
    n-butyric acid 104.83
    acetyl acetate 47.62
    di(2-ethylhexyl) phthalate 19.52
    ethyl propionate 21.43
    nitromethane 177.87
    1,2-diethoxyethane 13.31
    benzonitrile 71.71
    trioctyl phosphate 10.96
    1-bromopropane 36.17
    gamma-valerolactone 220.97
    n-decanol 3.67
    triethyl phosphate 16.17
    4-methyl-2-pentanol 11.62
    propionitrile 37.66
    vinylene carbonate 149.38
    1,1,2-trichlorotrifluoroethane 262.85
    DMS 35.65
    cumene 6.42
    2-octanol 5.57
    2-hexanone 22.62
    octyl acetate 9.49
    limonene 7.88
    1,2-dimethoxyethane 57.04
    ethyl orthosilicate 14.51
    tributyl phosphate 13.38
    diacetone alcohol 49.66
    N,N-dimethylaniline 14.12
    acrylonitrile 69.54
    aniline 57.81
    1,3-propanediol 87.92
    bromobenzene 68.86
    dibromomethane 131.32
    1,1,2,2-tetrachloroethane 284.2
    2-methyl-cyclohexyl acetate 23.24
    tetrabutyl urea 17.59
    diisobutyl methanol 6.38
    2-phenylethanol 46.43
    styrene 11.77
    dioctyl adipate 13.39
    dimethyl sulfate 69.09
    ethyl butyrate 18.15
    methyl lactate 51.7
    butyl lactate 27.35
    diethyl carbonate 16.78
    propanediol butyl ether 28.57
    triethyl orthoformate 15.12
    p-tert-butyltoluene 6.15
    methyl 4-tert-butylbenzoate 30.9
    morpholine 103.62
    tert-butylamine 12.3
    n-dodecanol 2.67
    dimethoxymethane 59.85
    ethylene carbonate 106.89
    cyrene 61.24
    2-ethoxyethyl acetate 31.89
    2-ethylhexyl acetate 26.02
    1,2,4-trichlorobenzene 95.61
    4-methylpyridine 120.78
    dibutyl ether 3.13
    2,6-dimethyl-4-heptanol 6.38
    DEF 58.95
    dimethyl isosorbide 59.57
    tetrachloroethylene 171.45
    eugenol 39.4
    triacetin 22.64
    span 80 26.51
    1,4-butanediol 33.63
    1,1-dichloroethane 104.08
    2-methyl-1-pentanol 29.06
    methyl formate 95.71
    2-methyl-1-butanol 37.77
    n-decane 0.27
    butyronitrile 41.88
    3,7-dimethyl-1-octanol 7.19
    1-chlorooctane 2.45
    1-chlorotetradecane 1.15
    n-nonane 0.21
    undecane 0.23
    tert-butylcyclohexane 0.83
    cyclooctane 0.47
    cyclopentanol 59.47
    tetrahydropyran 48.41
    tert-amyl methyl ether 14.75
    2,5,8-trioxanonane 40.17
    1-hexene 3.03
    2-isopropoxyethanol 33.0
    2,2,2-trifluoroethanol 100.05
    methyl butyrate 35.15

    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