Clopyralid

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  • Identifiers

    CAS number
    1702-17-6

    Molecular formula
    C6H3Cl2NO2

    SMILES
    C1=CC(=NC(=C1Cl)C(=O)O)Cl

    Safety labels

    Corrosive
    Corrosive

  • Odor profile

    Fragrance
    Odorless 71.39%
    Roasted 26.15%
    Meaty 22.58%
    Cooked 21.86%
    Bitter 21.78%
    Savory 21.15%
    Burnt 20.96%
    Nutty 20.28%
    Grape 19.96%
    Animal 19.28%

     

    Flavor
    Odorless 56.46%
    Bitter 47.84%
    Mild 39.11%
    Nutty 30.56%
    Bland 23.28%
    Very mild 23.26%
    Roasted 22.29%
    Bread crust 21.93%
    Roasted peanuts 21.42%
    Taco 21.34%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    2.3

    pKa est.
    6.54 (neutral)

    Molecular weight
    192.0 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    325°C

    Melting point expt.

    • 151-152 °C

    Flash point

    • 147.76 ˚C est.

    Solubility expt.

    • In water, 7.85X10+3 mg/L (distilled water); 188 g/L at pH 5, 143 g/L ay pH 7; 157 g/L at pH 9, all at 20 °C
    • Approximately 1000 ppm in water at 25 °C
    • Solubility at 25 °C: > 25% w/w in methanol, acetone, xylene
    • Solubility (g/kg, 20 °C): acetonitrile 121, n-hexane 6, methanol 104
    • Solubility at 25 °C: acetone > 25 g/100 mL; methanol > 15 g/100 mL; xylene < 0.65 g/100 mL
    • Solubility in water at 20 °C: poor

  • Synonyms

    • CLOPYRALID
    • 1702-17-6
    • 3,6-Dichloropyridine-2-carboxylic acid
    • 3,6-Dichloropicolinic acid
    • 3,6-Dichloro-2-pyridinecarboxylic acid
    • 2-Pyridinecarboxylic acid, 3,6-dichloro-
    • Clopyralide
    • Benzalox
    • Cirtoxin
    • Cyronal
    • Dowco 290
    • Lontrel
    • Matrigon
    • Versatill
    • Format
    • Shield
    • Lontrel L
    • Lontrel 3
    • Reclaim
    • Stinger
    • Transline
    • Acide dichloro-3,6 picolinique
    • Lontrel 100
    • Lontrel 300
    • Acide 3,6-dichloropicolinique
    • IWD 3523
    • XRM 3972
    • Acide 3,6-dichloropicolinique [French]
    • 10G14M0WDH
    • Kyselina 3,6-dichlorpikolinova
    • Acide dichloro-3,6 picolinique [French]
    • DTXSID9029221
    • Picolinic acid, 3,6-dichloro-
    • CHEBI:62961
    • CLOPYRALID [MI]
    • CLOPYRALID [ISO]
    • CLOPYRALID [HSDB]
    • MFCD00078655
    • DTXCID309221
    • 3,6-DCP
    • Clopyralid 10 microg/mL in Acetonitrile
    • Campaign
    • Cliophar
    • Huiloralid
    • Clopyralid 100 microg/mL in Acetonitrile
    • Loncid
    • Crusader S
    • Lontrel SF 100
    • Caswell No. 323H
    • 3,6-Dichloro-pyridine-2-carboxylic acid
    • Acide dichloro-3,6 picolinique (French)
    • CAS-1702-17-6
    • Clopyralid [ANSI:BSI:ISO]
    • HSDB 6593
    • EINECS 216-935-4
    • 3,6-Dichloro-2-Pyridinecarboxylicacid
    • EPA Pesticide Chemical Code 117401
    • BRN 0473755
    • Kyselina 3,6-dichlorpikolinova [Czech]
    • UNII-10G14M0WDH
    • Clopiralid
    • 2-Pyridine carboxylic acid, 3,6-dichloro-
    • Clopyralid (Standard)
    • 3,6Dichloropicolinic acid
    • Acide 3,6dichloropicolinique
    • SCHEMBL54779
    • Picolinic acid, 3,6dichloro
    • 5-22-02-00046 (Beilstein Handbook Reference)
    • Kyselina 3,6dichlorpikolinova
    • Acide dichloro3,6 picolinique
    • CHEMBL1650605
    • 3,6Dichloro2pyridinecarboxylic acid
    • HY-W018749R
    • Tox21_201435
    • Tox21_300876
    • 3,6-dichloropyridine carboxylic acid
    • AC-330
    • STK373127
    • AKOS001083806
    • AB03013
    • CS-W019535
    • HY-W018749
    • PS-6031
    • 2Pyridine carboxylic acid, 3,6dichloro
    • 3,6 Dichloropyridine-2-carboxylic acid
    • USEPA/OPP Pesticide Code: 117403
    • 2-Pyridinecarboxylic acid, 3,6-dichloro
    • 3,6-dichloro-2-pyridine carboxylic acid
    • NCGC00163834-01
    • NCGC00163834-02
    • NCGC00163834-04
    • NCGC00163834-05
    • NCGC00163834-06
    • NCGC00254780-01
    • NCGC00258986-01
    • DB-022127
    • D4117
    • EU-0000162
    • NS00005373
    • Clopyralid, PESTANAL(R), analytical standard
    • EN300-08124
    • C18779
    • D67447
    • F11213
    • SR-01000389672
    • Q2188539
    • SR-01000389672-1
    • Z56846826
    • 3,6-Dichloro-2-pyridinecarboxylic acid, 3,6-Dichloropicolinic acid
    • 216-935-4

  • Applications

    Clopyralid (CAS 1702-17-6) is a selective herbicide and an active ingredient in formulations for broadleaf weed control in agriculture and land management. It is commonly applied to cereals, oilseeds, and legume crops to suppress broadleaf weeds with limited crop injury. It is also used in pasture and forage systems to control broadleaf weeds such as those that compete with grasses. In turf and landscape maintenance, clopyralid-based products provide selective control of broadleaf weeds in established lawns, golf courses, and other managed turf areas. Additionally, it is employed in non-crop vegetation management under professional weed-control programs for rights-of-way, industrial sites, and maintained landscapes, typically as part of integrated weed management.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 34.68
    methanol 35.43
    isopropanol 33.31
    water 3.78
    ethyl acetate 58.72
    n-propanol 34.58
    acetone 99.69
    n-butanol 32.36
    acetonitrile 26.89
    DMF 710.17
    toluene 19.3
    isobutanol 28.33
    1,4-dioxane 69.6
    methyl acetate 51.15
    THF 175.17
    2-butanone 93.54
    n-pentanol 36.91
    sec-butanol 40.33
    n-hexane 3.65
    ethylene glycol 38.75
    NMP 390.91
    cyclohexane 1.23
    DMSO 389.44
    n-butyl acetate 51.71
    n-octanol 31.4
    chloroform 26.97
    n-propyl acetate 54.78
    acetic acid 19.23
    dichloromethane 42.34
    cyclohexanone 85.72
    propylene glycol 20.85
    isopropyl acetate 48.29
    DMAc 562.89
    2-ethoxyethanol 96.57
    isopentanol 33.27
    n-heptane 6.19
    ethyl formate 43.61
    1,2-dichloroethane 53.76
    n-hexanol 45.47
    2-methoxyethanol 129.25
    isobutyl acetate 26.0
    tetrachloromethane 8.62
    n-pentyl acetate 43.23
    transcutol 100.21
    n-heptanol 34.05
    ethylbenzene 23.13
    MIBK 58.74
    2-propoxyethanol 113.36
    tert-butanol 51.69
    MTBE 52.66
    2-butoxyethanol 64.42
    propionic acid 22.79
    o-xylene 28.71
    formic acid 31.82
    diethyl ether 39.17
    m-xylene 28.29
    p-xylene 27.24
    chlorobenzene 18.91
    dimethyl carbonate 66.54
    n-octane 3.46
    formamide 64.87
    cyclopentanone 148.37
    2-pentanone 91.6
    anisole 64.49
    cyclopentyl methyl ether 78.99
    gamma-butyrolactone 132.19
    1-methoxy-2-propanol 114.73
    pyridine 52.95
    3-pentanone 81.68
    furfural 119.08
    n-dodecane 3.37
    diethylene glycol 105.22
    diisopropyl ether 18.99
    tert-amyl alcohol 57.4
    acetylacetone 112.57
    n-hexadecane 3.75
    acetophenone 72.01
    methyl propionate 83.18
    isopentyl acetate 40.81
    trichloroethylene 70.66
    n-nonanol 29.93
    cyclohexanol 27.67
    benzyl alcohol 47.13
    2-ethylhexanol 33.6
    isooctanol 26.63
    dipropyl ether 44.62
    1,2-dichlorobenzene 25.43
    ethyl lactate 40.74
    propylene carbonate 54.77
    n-methylformamide 143.26
    2-pentanol 33.83
    n-pentane 2.87
    1-propoxy-2-propanol 80.3
    1-methoxy-2-propyl acetate 72.75
    2-(2-methoxypropoxy) propanol 66.42
    mesitylene 21.63
    ε-caprolactone 69.81
    p-cymene 24.46
    epichlorohydrin 138.21
    1,1,1-trichloroethane 29.15
    2-aminoethanol 39.38
    morpholine-4-carbaldehyde 244.64
    sulfolane 231.14
    2,2,4-trimethylpentane 3.53
    2-methyltetrahydrofuran 83.78
    n-hexyl acetate 45.54
    isooctane 2.72
    2-(2-butoxyethoxy)ethanol 71.11
    sec-butyl acetate 38.48
    tert-butyl acetate 56.15
    decalin 3.46
    glycerin 44.94
    diglyme 124.3
    acrylic acid 23.25
    isopropyl myristate 27.0
    n-butyric acid 30.13
    acetyl acetate 30.48
    di(2-ethylhexyl) phthalate 24.7
    ethyl propionate 61.71
    nitromethane 83.41
    1,2-diethoxyethane 53.54
    benzonitrile 41.32
    trioctyl phosphate 24.82
    1-bromopropane 27.64
    gamma-valerolactone 154.46
    n-decanol 25.15
    triethyl phosphate 34.1
    4-methyl-2-pentanol 26.13
    propionitrile 33.37
    vinylene carbonate 46.6
    1,1,2-trichlorotrifluoroethane 93.74
    DMS 40.73
    cumene 20.06
    2-octanol 28.62
    2-hexanone 70.75
    octyl acetate 33.56
    limonene 28.7
    1,2-dimethoxyethane 162.14
    ethyl orthosilicate 31.99
    tributyl phosphate 24.4
    diacetone alcohol 84.96
    N,N-dimethylaniline 71.78
    acrylonitrile 52.03
    aniline 32.65
    1,3-propanediol 46.51
    bromobenzene 18.67
    dibromomethane 26.99
    1,1,2,2-tetrachloroethane 63.6
    2-methyl-cyclohexyl acetate 37.62
    tetrabutyl urea 47.35
    diisobutyl methanol 24.56
    2-phenylethanol 51.25
    styrene 23.58
    dioctyl adipate 32.87
    dimethyl sulfate 163.35
    ethyl butyrate 49.71
    methyl lactate 61.6
    butyl lactate 38.67
    diethyl carbonate 32.23
    propanediol butyl ether 49.24
    triethyl orthoformate 37.64
    p-tert-butyltoluene 24.74
    methyl 4-tert-butylbenzoate 61.89
    morpholine 85.92
    tert-butylamine 29.14
    n-dodecanol 20.47
    dimethoxymethane 247.13
    ethylene carbonate 37.97
    cyrene 80.89
    2-ethoxyethyl acetate 50.39
    2-ethylhexyl acetate 36.07
    1,2,4-trichlorobenzene 29.26
    4-methylpyridine 74.86
    dibutyl ether 27.15
    2,6-dimethyl-4-heptanol 24.56
    DEF 175.65
    dimethyl isosorbide 113.38
    tetrachloroethylene 44.14
    eugenol 72.03
    triacetin 40.15
    span 80 44.9
    1,4-butanediol 32.44
    1,1-dichloroethane 30.2
    2-methyl-1-pentanol 35.92
    methyl formate 106.78
    2-methyl-1-butanol 34.19
    n-decane 4.65
    butyronitrile 35.12
    3,7-dimethyl-1-octanol 28.55
    1-chlorooctane 17.54
    1-chlorotetradecane 9.5
    n-nonane 4.19
    undecane 3.93
    tert-butylcyclohexane 4.24
    cyclooctane 1.32
    cyclopentanol 39.84
    tetrahydropyran 39.69
    tert-amyl methyl ether 60.54
    2,5,8-trioxanonane 101.45
    1-hexene 16.0
    2-isopropoxyethanol 67.11
    2,2,2-trifluoroethanol 26.16
    methyl butyrate 73.02

    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