Triclopyr

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  • Identifiers

    CAS number
    55335-06-3

    Molecular formula
    C7H4Cl3NO3

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

    Safety labels

    Irritant
    Irritant

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Odorless 70.27%
    Milky 22.47%
    Savory 22.37%
    Fatty 18.65%
    Meaty 17.97%
    Cooked 17.93%
    Dairy 17.22%
    Musk 17.04%
    Roasted 16.72%
    Burnt 16.59%

     

    Flavor
    Odorless 60.22%
    Bitter 47.61%
    Mild 38.07%
    Bland 29.78%
    Very mild 27.0%
    Sweet-like 22.5%
    Yeast 20.3%
    Bread crust 19.79%
    Orange flower 19.53%
    Taco 19.48%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    3.0

    pKa est.
    6.54 (neutral)

    Molecular weight
    256.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Melting point expt.

    • 150.5 °C
    • 148-150 °C

    Boiling point

    • 290 °C /decomposes/

    Flash point

    • 198.5 ˚C est.

    Solubility expt.

    • In water, 440 mg/L at 25 °C
    • In acetone = 989 g/kg; in 1-octanol = 307 g/kg
    • In acetone 581, acetonitrile 92.1, hexane 0.09, toluene 19.2, dichloromethane 24.9, methanol 665, ethyl acetate 271 (all in g/L)
    • Solubility in water, g/100ml at 25 °C: 0.04 (none)

  • Synonyms

    • TRICLOPYR
    • 55335-06-3
    • Redeem
    • Confront
    • Trichlopyr
    • Garlon 2
    • Dowco 233
    • Garlon 250
    • 2-((3,5,6-Trichloropyridin-2-yl)oxy)acetic acid
    • 3,5,6-Trichloro-2-pyridyloxyacetic acid
    • Grazon ET
    • Caswell No. 882I
    • ((3,5,6-Trichloro-2-pyridinyl)oxy)acetic acid
    • MV06PHJ6I0
    • NSC-190671
    • 2-[(3,5,6-trichloropyridin-2-yl)oxy]acetic acid
    • DTXSID0032497
    • CHEBI:9682
    • DTXCID8012497
    • RefChem:899274
    • triclopyr-(3,5,6-trichloro-2-pyridl-oxyacetic acid)
    • 259-597-3
    • Release
    • Garlon
    • Turflon
    • Acetic acid, [(3,5,6-trichloro-2-pyridinyl)oxy]-
    • C7H4Cl3NO3
    • MFCD00072514
    • NSC 190671
    • 2-(3,5,6-trichloropyridin-2-yl)oxyacetic acid
    • 3,5,6-TPA
    • [(3,5,6-trichloropyridin-2-yl)oxy]acetic acid
    • 2-[(3,5,6-trichloro-2-pyridyl)oxy]acetic acid
    • Triclopyr 100 microg/mL in Acetone
    • Acetic acid, ((3,5,6-trichloro-2-pyridinyl)oxy)-
    • NCGC00163927-04
    • Triclopyr 100 microg/mL in Acetonitrile
    • [(3,5,6-tTichloro-2-pyridyl)oxy]acetic Acid
    • ((3,5,6-Trichloropyridin-2-yl)oxy)acetic acid
    • 2-[(3,5,6-Trichloro-2-pyridinyl)oxy]acetic Acid
    • Triclopyr [ANSI]
    • Triclopyr [ISO]
    • Release [Pesticide]
    • HSDB 7060
    • Triclopyr [ANSI:ISO]
    • EINECS 259-597-3
    • UNII-MV06PHJ6I0
    • Acetic acid, 2-((3,5,6-trichloro-2-pyridinyl)oxy)-
    • Acetic acid, 2-[(3,5,6-trichloro-2-pyridinyl)oxy]-
    • EPA Pesticide Chemical Code 116001
    • BRN 0225301
    • 2-((3,5,6-TRICHLORO-2-PYRIDINYL)OXY)ACETIC ACID
    • TRICLOPYR [MI]
    • 3,4,5-Trichloro-2-pyridinyloxyacetic acid
    • TRICLOPYR [HSDB]
    • Acetic acid, (3,5,6-trichloro-2-pyridyloxy)-
    • SCHEMBL37162
    • 4-21-00-00362 (Beilstein Handbook Reference)
    • orb1705237
    • orb3024997
    • CHEMBL1865925
    • SCHEMBL29350609
    • HY-B2051
    • MSK22202
    • Triclopyr 10 microg/mL in Acetone
    • WLN: T6NJ BO1VQ CG EG FG
    • Tox21_400073
    • NSC190671
    • AKOS015895897
    • AC-2622
    • EBC-348059
    • FT28420
    • KS-5287
    • NCGC00163927-01
    • NCGC00163927-02
    • NCGC00163927-03
    • NCGC00163927-05
    • SY107508
    • CAS-55335-06-3
    • DB-052715
    • Acetic acid,5,6-trichloro-2-pyridyl)oxy]-
    • CS-0014145
    • NS00000442
    • T3742
    • [(3,6-Trichloro-2-pyridinyl)oxy]acetic acid
    • Acetic acid,5,6-trichloro-2-pyridinyl)oxy]-
    • Triclopyr, PESTANAL(R), analytical standard
    • D92737
    • EN300-7357031
    • [(3,5,6-trichloropyridin-2-yl)oxy]ethanoic acid
    • 335T063
    • Acetic acid, ((3,5,6-trichloro-2-pyridyl)oxy)-
    • Q2303660
    • SBK
    • 55335-06-3

  • Applications

    Triclopyr (CAS 55335-06-3) is a selective systemic herbicide in the pyridine class, typically applied as an ester formulation or amine salt. Real-world applications include controlling broadleaf weeds and woody brush in forestry site preparation and stand release; managing weeds in pastures and rangeland to improve forage; vegetation management along rights-of-way, roadsides, and utility corridors; landscape and turf weed control in parks, golf courses, and urban grounds; and vegetation control in noncrop and industrial sites.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 63.0
    methanol 65.57
    isopropanol 40.72
    water 1.11
    ethyl acetate 49.55
    n-propanol 55.81
    acetone 105.29
    n-butanol 44.23
    acetonitrile 41.2
    DMF 242.4
    toluene 3.76
    isobutanol 32.2
    1,4-dioxane 84.89
    methyl acetate 71.27
    THF 274.79
    2-butanone 100.84
    n-pentanol 45.43
    sec-butanol 51.42
    n-hexane 1.6
    ethylene glycol 22.62
    NMP 242.29
    cyclohexane 1.65
    DMSO 153.84
    n-butyl acetate 58.87
    n-octanol 17.85
    chloroform 4.21
    n-propyl acetate 63.49
    acetic acid 43.2
    dichloromethane 10.12
    cyclohexanone 68.86
    propylene glycol 17.99
    isopropyl acetate 32.66
    DMAc 326.66
    2-ethoxyethanol 150.71
    isopentanol 35.69
    n-heptane 4.81
    ethyl formate 44.36
    1,2-dichloroethane 12.26
    n-hexanol 30.62
    2-methoxyethanol 182.4
    isobutyl acetate 30.53
    tetrachloromethane 0.3
    n-pentyl acetate 31.78
    transcutol 160.99
    n-heptanol 20.52
    ethylbenzene 5.63
    MIBK 32.67
    2-propoxyethanol 101.53
    tert-butanol 45.34
    MTBE 52.33
    2-butoxyethanol 58.68
    propionic acid 26.41
    o-xylene 5.55
    formic acid 44.23
    diethyl ether 45.75
    m-xylene 3.5
    p-xylene 8.49
    chlorobenzene 3.9
    dimethyl carbonate 35.15
    n-octane 1.95
    formamide 92.1
    cyclopentanone 120.42
    2-pentanone 64.09
    anisole 36.91
    cyclopentyl methyl ether 67.16
    gamma-butyrolactone 120.31
    1-methoxy-2-propanol 107.39
    pyridine 49.14
    3-pentanone 49.61
    furfural 93.46
    n-dodecane 1.59
    diethylene glycol 74.08
    diisopropyl ether 10.47
    tert-amyl alcohol 54.89
    acetylacetone 56.11
    n-hexadecane 1.74
    acetophenone 46.52
    methyl propionate 58.47
    isopentyl acetate 45.08
    trichloroethylene 13.63
    n-nonanol 17.42
    cyclohexanol 33.72
    benzyl alcohol 36.73
    2-ethylhexanol 23.68
    isooctanol 16.48
    dipropyl ether 47.34
    1,2-dichlorobenzene 4.26
    ethyl lactate 36.27
    propylene carbonate 49.66
    n-methylformamide 98.62
    2-pentanol 31.67
    n-pentane 1.86
    1-propoxy-2-propanol 69.11
    1-methoxy-2-propyl acetate 62.04
    2-(2-methoxypropoxy) propanol 62.82
    mesitylene 2.91
    ε-caprolactone 75.18
    p-cymene 10.2
    epichlorohydrin 96.96
    1,1,1-trichloroethane 3.33
    2-aminoethanol 40.78
    morpholine-4-carbaldehyde 196.72
    sulfolane 100.23
    2,2,4-trimethylpentane 1.52
    2-methyltetrahydrofuran 137.5
    n-hexyl acetate 29.18
    isooctane 0.67
    2-(2-butoxyethoxy)ethanol 74.14
    sec-butyl acetate 35.65
    tert-butyl acetate 35.39
    decalin 1.34
    glycerin 33.62
    diglyme 145.94
    acrylic acid 23.92
    isopropyl myristate 16.04
    n-butyric acid 31.92
    acetyl acetate 21.3
    di(2-ethylhexyl) phthalate 17.2
    ethyl propionate 49.38
    nitromethane 102.21
    1,2-diethoxyethane 71.46
    benzonitrile 22.14
    trioctyl phosphate 13.13
    1-bromopropane 10.05
    gamma-valerolactone 146.14
    n-decanol 14.74
    triethyl phosphate 26.36
    4-methyl-2-pentanol 15.78
    propionitrile 37.33
    vinylene carbonate 35.01
    1,1,2-trichlorotrifluoroethane 50.82
    DMS 30.02
    cumene 5.75
    2-octanol 15.82
    2-hexanone 68.02
    octyl acetate 21.96
    limonene 15.04
    1,2-dimethoxyethane 243.92
    ethyl orthosilicate 25.32
    tributyl phosphate 16.67
    diacetone alcohol 55.25
    N,N-dimethylaniline 39.41
    acrylonitrile 42.1
    aniline 16.93
    1,3-propanediol 54.3
    bromobenzene 2.55
    dibromomethane 5.56
    1,1,2,2-tetrachloroethane 12.13
    2-methyl-cyclohexyl acetate 36.18
    tetrabutyl urea 36.27
    diisobutyl methanol 13.5
    2-phenylethanol 32.01
    styrene 6.53
    dioctyl adipate 26.72
    dimethyl sulfate 44.2
    ethyl butyrate 56.74
    methyl lactate 38.0
    butyl lactate 30.44
    diethyl carbonate 35.82
    propanediol butyl ether 39.34
    triethyl orthoformate 45.37
    p-tert-butyltoluene 9.56
    methyl 4-tert-butylbenzoate 41.06
    morpholine 152.79
    tert-butylamine 20.54
    n-dodecanol 12.02
    dimethoxymethane 147.74
    ethylene carbonate 31.16
    cyrene 74.58
    2-ethoxyethyl acetate 46.15
    2-ethylhexyl acetate 36.74
    1,2,4-trichlorobenzene 7.31
    4-methylpyridine 40.51
    dibutyl ether 28.16
    2,6-dimethyl-4-heptanol 13.5
    DEF 109.62
    dimethyl isosorbide 102.29
    tetrachloroethylene 5.75
    eugenol 43.71
    triacetin 34.79
    span 80 35.33
    1,4-butanediol 32.33
    1,1-dichloroethane 6.74
    2-methyl-1-pentanol 37.15
    methyl formate 75.42
    2-methyl-1-butanol 40.12
    n-decane 2.38
    butyronitrile 35.75
    3,7-dimethyl-1-octanol 17.35
    1-chlorooctane 6.62
    1-chlorotetradecane 3.7
    n-nonane 2.18
    undecane 1.9
    tert-butylcyclohexane 1.3
    cyclooctane 0.88
    cyclopentanol 57.6
    tetrahydropyran 70.79
    tert-amyl methyl ether 51.14
    2,5,8-trioxanonane 104.63
    1-hexene 8.43
    2-isopropoxyethanol 88.57
    2,2,2-trifluoroethanol 20.58
    methyl butyrate 70.58

    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