Imazapyr

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  • Identifiers

    CAS number
    81334-34-1

    Molecular formula
    C13H15N3O3

    SMILES
    CC(C)C1(C(=O)NC(=N1)C2=C(C=CC=N2)C(=O)O)C

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 64.03%
    Roasted 29.38%
    Nutty 25.58%
    Popcorn 23.89%
    Cooling 21.14%
    Mint 18.88%
    Savory 18.6%
    Burnt 18.55%
    Bitter 16.75%
    Cooked 16.75%

     

    Flavor
    Bitter 77.07%
    Odorless 32.66%
    Bland 20.52%
    Cedarleaf 19.69%
    Taco 19.24%
    Bread crust 19.0%
    Roasted peanuts 18.94%
    Nitrile 18.75%
    Lovage 18.35%
    Carrot 18.32%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    1.2

    pKa est.
    6.68 (neutral)

    Molecular weight
    261.28 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    498°C

    Melting point expt.

    • 171 °C
    • MP: 160-180 (decomposes) /Imazapyr isopropylamine salt/

    Flash point

    • 211.94 ˚C est.

    Solubility expt.

    • In acetone 3.39, dimethyl sulfoxide 47.1, hexane 0.00095, methanol 10.5, dichloromethane 8.72, toluene 0.180 (25 °C, all in g/100 mL)
    • In water, 1.13X10+4 mg/L at 25 °C; 9.74 g/L at 15 °C

  • Synonyms

    • Imazapyr
    • 81334-34-1
    • Charper
    • Arsenal 250A
    • (+-)-Imazapyr
    • 2-(4-Isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)nicotinic acid
    • DTXSID8034665
    • 787MX0M5A6
    • AC 243,997
    • 3-Pyridinecarboxylic acid, 2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl)-
    • DTXCID6014665
    • 2-(4,5-Dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl)-3-pyridinecarboxylic acid
    • 3-Pyridinecarboxylic acid, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-
    • 2-(5-methyl-4-oxo-5-(propan-2-yl)-4,5-dihydro-1H-imidazol-2-yl)pyridine-3-carboxylic acid
    • 2-[5-methyl-4-oxo-5-(propan-2-yl)-4,5-dihydro-1H-imidazol-2-yl]pyridine-3-carboxylic acid
    • RefChem:790605
    • CHEBI:82021
    • 617-219-8
    • Imazapyr acid
    • 3-Pyridinecarboxylicacid, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-
    • 2-(4-isopropyl-4-methyl-5-oxo-4,5-dihydro-1H-imidazol-2-yl)nicotinic acid
    • 2-[4-methyl-5-oxo-4-(propan-2-yl)-4,5-dihydro-1H-imidazol-2-yl]pyridine-3-carboxylic acid
    • MFCD00144470
    • 2-(4-methyl-5-oxo-4-propan-2-yl-1H-imidazol-2-yl)pyridine-3-carboxylic acid
    • (+/-)-Imazapyr
    • Caswell No. 003F
    • Imazapyr [ANSI:BSI:ISO]
    • CCRIS 8873
    • HSDB 6676
    • EPA Pesticide Chemical Code 128821
    • BRN 5442754
    • UNII-787MX0M5A6
    • ()-Imazapyr
    • IMAZAPYR [HSDB]
    • IMAZAPYR [ISO]
    • IMAZAPYR [MI]
    • ChemDiv3_000415
    • IMAZAPYR, (RS)-
    • SCHEMBL18541
    • CBDivE_005644
    • IFLab1_000189
    • orb1696951
    • SCHEMBL7910507
    • CHEMBL1621900
    • IMAZAPYR, (+/-)-
    • SCHEMBL30165351
    • CLQMBPJKHLGMQK-UHFFFAOYSA-
    • CHEBI:133187
    • HMS1412I13
    • HMS1474C19
    • BB_SC-04059
    • GDA33434
    • MSK22540
    • Tox21_301001
    • BBL010100
    • MFCD00525150
    • STK711164
    • 2-(4-isopropyl-4-methyl-5-oxo-1H-imidazol-2-yl)pyridine-3-carboxylic acid
    • AKOS001578180
    • AKOS004912681
    • CCG-103717
    • EBC-609966
    • Imazapyr 10 microg/mL in Acetonitrile
    • IDI1_008408
    • NCGC00160495-01
    • NCGC00160495-02
    • NCGC00160495-03
    • NCGC00160495-04
    • NCGC00160495-05
    • NCGC00254903-01
    • 3-pyridinecarboxylic acid, 2-(4,5-dihydro-4-methyl-4-(1- methylethyl)-5-oxo-1H-imidazol-2-yl)-
    • VS-02317
    • CAS-81334-34-1
    • EU-0067726
    • Imazapyr, PESTANAL(R), analytical standard
    • NS00002912
    • A12858
    • C18864
    • 334I341
    • SR-01000395021
    • SR-01000396484
    • Q3323027
    • SR-01000395021-1
    • SR-01000396484-1
    • Z56768722
    • 2-(5-isopropyl-5-methyl-4-oxo-2-imidazolin-2-yl)nicotinic acid
    • 2-(5-isopropyl-5-methyl-4-oxo-4,5-dihydro-1H-imidazol-2-yl)nicotinic acid
    • 2-(4,5-DIHYDRO-4-METHYL-4-(1-METHYLETHYL)-5-OXO-1H-IMIDAZOL- 2-YL)-3-PYRIDINECARBOXYLIC ACID
    • 94795-74-1
    • InChI=1/C13H15N3O3/c1-7(2)13(3)12(19)15-10(16-13)9-8(11(17)18)5-4-6-14-9/h4-7H,1-3H3,(H,17,18)(H,15,16,19)
    • 81334-34-1

  • Applications

    Imazapyr (CAS 81334-34-1) is used primarily as a systemic, broad-spectrum herbicide applied to the soil to control perennial weeds and brush in agricultural production and as a site-preparation tool for reforestation. It is widely employed for vegetation management in non-crop areas such as rights-of-way, utility corridors, industrial sites, and other undeveloped lands where long-lasting control of woody and herbaceous weeds is desired. In turf and landscape settings, it is used to suppress stubborn weeds in lawns and ornamental plantings, often in combination with other herbicides. The product is formulated in various tank mixes with adjuvants to enhance soil penetration and residual activity, and use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 15.5
    methanol 28.03
    isopropanol 8.79
    water 0.35
    ethyl acetate 6.08
    n-propanol 14.09
    acetone 7.49
    n-butanol 12.81
    acetonitrile 4.02
    DMF 125.03
    toluene 3.83
    isobutanol 9.95
    1,4-dioxane 11.9
    methyl acetate 9.92
    THF 39.02
    2-butanone 18.76
    n-pentanol 6.36
    sec-butanol 11.89
    n-hexane 0.16
    ethylene glycol 10.86
    NMP 112.3
    cyclohexane 0.25
    DMSO 107.57
    n-butyl acetate 8.76
    n-octanol 0.67
    chloroform 27.1
    n-propyl acetate 4.13
    acetic acid 32.12
    dichloromethane 27.04
    cyclohexanone 29.85
    propylene glycol 11.05
    isopropyl acetate 4.79
    DMAc 191.39
    2-ethoxyethanol 26.51
    isopentanol 13.27
    n-heptane 0.09
    ethyl formate 9.4
    1,2-dichloroethane 21.25
    n-hexanol 7.26
    2-methoxyethanol 69.1
    isobutyl acetate 2.53
    tetrachloromethane 3.81
    n-pentyl acetate 3.69
    transcutol 29.87
    n-heptanol 2.73
    ethylbenzene 2.0
    MIBK 7.32
    2-propoxyethanol 36.07
    tert-butanol 12.73
    MTBE 4.43
    2-butoxyethanol 16.38
    propionic acid 16.59
    o-xylene 3.66
    formic acid 54.24
    diethyl ether 3.13
    m-xylene 2.89
    p-xylene 3.34
    chlorobenzene 6.72
    dimethyl carbonate 10.39
    n-octane 0.04
    formamide 88.3
    cyclopentanone 41.45
    2-pentanone 9.29
    anisole 6.22
    cyclopentyl methyl ether 8.71
    gamma-butyrolactone 47.23
    1-methoxy-2-propanol 37.72
    pyridine 26.41
    3-pentanone 8.54
    furfural 57.46
    n-dodecane 0.03
    diethylene glycol 39.75
    diisopropyl ether 0.82
    tert-amyl alcohol 15.76
    acetylacetone 11.23
    n-hexadecane 0.03
    acetophenone 11.21
    methyl propionate 11.34
    isopentyl acetate 10.95
    trichloroethylene 52.4
    n-nonanol 0.9
    cyclohexanol 9.48
    benzyl alcohol 13.33
    2-ethylhexanol 3.34
    isooctanol 2.37
    dipropyl ether 1.59
    1,2-dichlorobenzene 8.64
    ethyl lactate 7.86
    propylene carbonate 21.37
    n-methylformamide 52.17
    2-pentanol 5.91
    n-pentane 0.16
    1-propoxy-2-propanol 16.26
    1-methoxy-2-propyl acetate 15.29
    2-(2-methoxypropoxy) propanol 16.01
    mesitylene 1.6
    ε-caprolactone 26.69
    p-cymene 1.81
    epichlorohydrin 63.9
    1,1,1-trichloroethane 11.31
    2-aminoethanol 20.72
    morpholine-4-carbaldehyde 73.95
    sulfolane 90.72
    2,2,4-trimethylpentane 0.19
    2-methyltetrahydrofuran 18.58
    n-hexyl acetate 2.88
    isooctane 0.1
    2-(2-butoxyethoxy)ethanol 17.18
    sec-butyl acetate 3.3
    tert-butyl acetate 7.35
    decalin 0.21
    glycerin 31.8
    diglyme 31.89
    acrylic acid 22.13
    isopropyl myristate 1.25
    n-butyric acid 19.75
    acetyl acetate 4.79
    di(2-ethylhexyl) phthalate 5.05
    ethyl propionate 4.85
    nitromethane 42.83
    1,2-diethoxyethane 4.66
    benzonitrile 9.63
    trioctyl phosphate 2.69
    1-bromopropane 5.97
    gamma-valerolactone 68.77
    n-decanol 0.68
    triethyl phosphate 6.71
    4-methyl-2-pentanol 4.4
    propionitrile 7.16
    vinylene carbonate 22.98
    1,1,2-trichlorotrifluoroethane 78.16
    DMS 8.08
    cumene 1.62
    2-octanol 1.01
    2-hexanone 6.08
    octyl acetate 1.81
    limonene 1.86
    1,2-dimethoxyethane 27.5
    ethyl orthosilicate 5.73
    tributyl phosphate 3.53
    diacetone alcohol 21.68
    N,N-dimethylaniline 5.94
    acrylonitrile 13.55
    aniline 14.25
    1,3-propanediol 30.83
    bromobenzene 5.51
    dibromomethane 14.67
    1,1,2,2-tetrachloroethane 46.9
    2-methyl-cyclohexyl acetate 6.58
    tetrabutyl urea 5.42
    diisobutyl methanol 2.1
    2-phenylethanol 14.37
    styrene 2.16
    dioctyl adipate 2.99
    dimethyl sulfate 36.95
    ethyl butyrate 5.14
    methyl lactate 19.25
    butyl lactate 7.82
    diethyl carbonate 5.09
    propanediol butyl ether 10.02
    triethyl orthoformate 5.4
    p-tert-butyltoluene 1.63
    methyl 4-tert-butylbenzoate 10.85
    morpholine 27.58
    tert-butylamine 4.25
    n-dodecanol 0.5
    dimethoxymethane 26.01
    ethylene carbonate 16.3
    cyrene 24.99
    2-ethoxyethyl acetate 7.9
    2-ethylhexyl acetate 7.58
    1,2,4-trichlorobenzene 14.26
    4-methylpyridine 25.27
    dibutyl ether 0.61
    2,6-dimethyl-4-heptanol 2.1
    DEF 22.95
    dimethyl isosorbide 30.42
    tetrachloroethylene 28.63
    eugenol 14.93
    triacetin 5.47
    span 80 9.81
    1,4-butanediol 9.66
    1,1-dichloroethane 11.23
    2-methyl-1-pentanol 8.93
    methyl formate 26.35
    2-methyl-1-butanol 13.5
    n-decane 0.04
    butyronitrile 6.07
    3,7-dimethyl-1-octanol 1.54
    1-chlorooctane 0.28
    1-chlorotetradecane 0.15
    n-nonane 0.03
    undecane 0.03
    tert-butylcyclohexane 0.18
    cyclooctane 0.08
    cyclopentanol 13.18
    tetrahydropyran 8.91
    tert-amyl methyl ether 5.72
    2,5,8-trioxanonane 23.02
    1-hexene 0.85
    2-isopropoxyethanol 12.61
    2,2,2-trifluoroethanol 24.35
    methyl butyrate 8.19

    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