Paclobutrazol

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  • Identifiers

    CAS number
    76738-62-0

    Molecular formula
    C15H20ClN3O

    SMILES
    CC(C)(C)[C@@H]([C@H](CC1=CC=C(C=C1)Cl)N2C=NC=N2)O

    Safety labels

    Irritant
    Irritant

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Floral 48.79%
    Woody 32.71%
    Animal 32.23%
    Grapefruit 28.34%
    Lily 26.98%
    Green 24.91%
    Rose 24.84%
    Fresh 23.72%
    Fruity 23.32%
    Vetiver 23.11%

     

    Flavor
    Bitter 55.88%
    Mild 27.25%
    Odorless 25.45%
    Bland 22.07%
    Green pepper 20.05%
    Cedarleaf 19.83%
    Carrot 19.3%
    Syrup 19.29%
    Yeasty 19.13%
    Tomato leaf 19.13%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    3.2

    pKa est.
    5.83 (weak acid)

    Molecular weight
    293.79 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    484°C

    Flash point

    • 178.68 ˚C est.

  • Synonyms

    • Paclobutrazol
    • Bonzi
    • Friazole
    • 76738-62-0
    • Clipper 50WP
    • Trimmit
    • Cultar
    • Parlay
    • 6PLV42R3ZA
    • (2S,3S)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol
    • DTXSID2024242
    • 1H-1,2,4-Triazole-1-ethanol, beta-((4-chlorophenyl)methyl)-alpha-(1,1-dimethylethyl)-, (alphaR,betaR)-rel-
    • DTXCID50196503
    • RefChem:858277
    • CHEBI:73162
    • 616-379-6
    • paclobutrazol (ISO); (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol
    • 1-(4-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pentan-3-ol
    • Caswell No. 628C
    • 66346-05-2
    • (2S,3S)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pentan-3-ol
    • 2S,3S-Paclobutrazol
    • Clipper
    • Duo Xiao Zuo
    • PP 333
    • Paclobutrazol [ISO]
    • (2S,3S)-Paclobutrazol
    • UNII-6PLV42R3ZA
    • ICI-PP 333
    • Paclobutrazol [ANSI:BSI:ISO]
    • (2RS,3RS)-1-(4-Chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol
    • EINECS 266-325-7
    • (S,S)-paclobutrazol
    • EPA Pesticide Chemical Code 125601
    • PACLOBUTRAZOL [MI]
    • 3EF5QC8G5W
    • Paclobutrazol, (2S,3S)-
    • SCHEMBL36911
    • alpha-tert-Butyl-beta-(4-chlorobenzyl)-1H-1,2,4-triazole-1-ethanol
    • CHEMBL1897373
    • DTXSID30216556
    • CHEBI:139344
    • RMOGWMIKYWRTKW-UONOGXRCSA-N
    • HY-B0853
    • AKOS040756325
    • (2RS,3RS)-1-(4-Chlorophenyl)-4,4-dimethyl-2-1,2,4-triazol-1-yl pentan-3-ol
    • beta-((4-Chlorophenyl)methyl)-alpha-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol
    • NCGC00164308-01
    • NCGC00164453-01
    • NCGC00168328-01
    • NCGC00168328-02
    • (R*,R*)-(+-)-beta-((4-Chlorophenyl)methyl)-alpha-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol
    • 1H-1,2,4-Triazole-1-ethanol, beta-((4-chlorophenyl)methyl)-alpha-(1,1-dimethylethyl)-, (S-(R*,R*))-
    • CS-0012866
    • NS00125046
    • P2299
    • Q3270569
    • alpha-tert-Butyl-beta-((4-chlorophenyl)methyl)-1H-triazol-1-ethanol
    • (2S,3S)-1-(4-Chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)-3-pentanol
    • (alphaS,betaS)-beta-[(4-Chlorophenyl)methyl]-alpha-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol
    • 1H-1,2,4-TRIAZOLE-1-ETHANOL, .BETA.-((4-CHLOROPHENYL)METHYL)-.ALPHA.-(1,1-DIMETHYLETHYL)-, (.ALPHA.R,.BETA.R)-REL-
    • 1H-1,2,4-Triazole-1-ethanol, beta-((4-chlorophenyl)methyl)-alpha-(1,1-dimethylethyl)-, (R*,R*)-(+-)-
    • 1H-1,2,4-Triazole-1-ethanol, beta-[(4-chlorophenyl)methyl]-alpha-(1,1-dimethylethyl)-, (alphaS,betaS)-
    • 76738-62-0

  • Applications

    Paclobutrazol, CAS 76738-62-0, is a triazole plant growth regulator used in agriculture and horticulture to inhibit gibberellin biosynthesis and control plant height; typical applications include reducing height and improving fruiting potential in fruit crops and grapes, treating ornamental and greenhouse crops to limit lodging and improve form, managing turfgrass height on lawns and sports fields, and use in nurseries and propagation systems to enhance uniform growth and quality of nursery stock.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 74.33
    methanol 136.62
    isopropanol 52.25
    water 2.92
    ethyl acetate 73.6
    n-propanol 68.87
    acetone 101.68
    n-butanol 69.85
    acetonitrile 31.73
    DMF 205.18
    toluene 148.1
    isobutanol 56.35
    1,4-dioxane 114.45
    methyl acetate 76.53
    THF 278.14
    2-butanone 122.82
    n-pentanol 67.82
    sec-butanol 56.37
    n-hexane 1.17
    ethylene glycol 29.74
    NMP 112.63
    cyclohexane 3.9
    DMSO 116.82
    n-butyl acetate 76.56
    n-octanol 43.54
    chloroform 389.61
    n-propyl acetate 66.68
    acetic acid 105.07
    dichloromethane 247.67
    cyclohexanone 157.41
    propylene glycol 62.18
    isopropyl acetate 55.12
    DMAc 303.99
    2-ethoxyethanol 142.8
    isopentanol 69.74
    n-heptane 3.41
    ethyl formate 73.61
    1,2-dichloroethane 115.85
    n-hexanol 77.03
    2-methoxyethanol 187.71
    isobutyl acetate 61.97
    tetrachloromethane 23.14
    n-pentyl acetate 58.81
    transcutol 305.28
    n-heptanol 61.97
    ethylbenzene 52.8
    MIBK 72.9
    2-propoxyethanol 158.31
    tert-butanol 75.79
    MTBE 54.08
    2-butoxyethanol 120.81
    propionic acid 55.04
    o-xylene 63.37
    formic acid 70.91
    diethyl ether 32.13
    m-xylene 79.06
    p-xylene 88.09
    chlorobenzene 116.36
    dimethyl carbonate 52.75
    n-octane 2.1
    formamide 90.16
    cyclopentanone 173.08
    2-pentanone 90.9
    anisole 100.56
    cyclopentyl methyl ether 97.39
    gamma-butyrolactone 156.59
    1-methoxy-2-propanol 150.47
    pyridine 181.79
    3-pentanone 70.66
    furfural 194.47
    n-dodecane 2.27
    diethylene glycol 129.59
    diisopropyl ether 12.85
    tert-amyl alcohol 68.16
    acetylacetone 115.24
    n-hexadecane 2.61
    acetophenone 115.7
    methyl propionate 76.56
    isopentyl acetate 83.61
    trichloroethylene 328.5
    n-nonanol 43.73
    cyclohexanol 69.77
    benzyl alcohol 126.71
    2-ethylhexanol 51.99
    isooctanol 49.82
    dipropyl ether 35.42
    1,2-dichlorobenzene 91.97
    ethyl lactate 57.98
    propylene carbonate 115.92
    n-methylformamide 77.23
    2-pentanol 43.78
    n-pentane 1.32
    1-propoxy-2-propanol 106.84
    1-methoxy-2-propyl acetate 101.62
    2-(2-methoxypropoxy) propanol 104.95
    mesitylene 33.69
    ε-caprolactone 123.18
    p-cymene 33.39
    epichlorohydrin 204.34
    1,1,1-trichloroethane 106.71
    2-aminoethanol 64.93
    morpholine-4-carbaldehyde 195.79
    sulfolane 134.27
    2,2,4-trimethylpentane 2.93
    2-methyltetrahydrofuran 128.46
    n-hexyl acetate 62.87
    isooctane 2.1
    2-(2-butoxyethoxy)ethanol 137.95
    sec-butyl acetate 53.52
    tert-butyl acetate 62.04
    decalin 4.04
    glycerin 84.84
    diglyme 212.25
    acrylic acid 59.82
    isopropyl myristate 30.91
    n-butyric acid 90.03
    acetyl acetate 53.96
    di(2-ethylhexyl) phthalate 48.65
    ethyl propionate 52.62
    nitromethane 121.25
    1,2-diethoxyethane 83.43
    benzonitrile 105.9
    trioctyl phosphate 30.58
    1-bromopropane 52.39
    gamma-valerolactone 246.78
    n-decanol 32.93
    triethyl phosphate 38.47
    4-methyl-2-pentanol 37.8
    propionitrile 45.17
    vinylene carbonate 120.84
    1,1,2-trichlorotrifluoroethane 179.95
    DMS 58.31
    cumene 34.2
    2-octanol 36.94
    2-hexanone 80.57
    octyl acetate 41.9
    limonene 39.79
    1,2-dimethoxyethane 174.85
    ethyl orthosilicate 39.49
    tributyl phosphate 32.33
    diacetone alcohol 100.32
    N,N-dimethylaniline 78.53
    acrylonitrile 64.07
    aniline 126.14
    1,3-propanediol 89.12
    bromobenzene 114.89
    dibromomethane 141.4
    1,1,2,2-tetrachloroethane 244.6
    2-methyl-cyclohexyl acetate 69.5
    tetrabutyl urea 47.25
    diisobutyl methanol 27.85
    2-phenylethanol 116.78
    styrene 63.36
    dioctyl adipate 50.71
    dimethyl sulfate 71.0
    ethyl butyrate 59.67
    methyl lactate 69.72
    butyl lactate 64.24
    diethyl carbonate 42.96
    propanediol butyl ether 108.34
    triethyl orthoformate 51.47
    p-tert-butyltoluene 31.66
    methyl 4-tert-butylbenzoate 86.3
    morpholine 147.63
    tert-butylamine 36.36
    n-dodecanol 24.69
    dimethoxymethane 136.4
    ethylene carbonate 91.34
    cyrene 118.93
    2-ethoxyethyl acetate 84.45
    2-ethylhexyl acetate 63.68
    1,2,4-trichlorobenzene 118.44
    4-methylpyridine 200.7
    dibutyl ether 29.72
    2,6-dimethyl-4-heptanol 27.85
    DEF 88.36
    dimethyl isosorbide 166.65
    tetrachloroethylene 135.63
    eugenol 98.29
    triacetin 75.59
    span 80 86.32
    1,4-butanediol 51.35
    1,1-dichloroethane 130.5
    2-methyl-1-pentanol 71.14
    methyl formate 80.87
    2-methyl-1-butanol 63.9
    n-decane 3.61
    butyronitrile 55.46
    3,7-dimethyl-1-octanol 44.8
    1-chlorooctane 20.68
    1-chlorotetradecane 8.72
    n-nonane 2.86
    undecane 2.76
    tert-butylcyclohexane 4.08
    cyclooctane 1.73
    cyclopentanol 71.57
    tetrahydropyran 105.46
    tert-amyl methyl ether 50.11
    2,5,8-trioxanonane 159.83
    1-hexene 11.25
    2-isopropoxyethanol 106.68
    2,2,2-trifluoroethanol 48.36
    methyl butyrate 77.3

    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