Ethephon

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  • Identifiers

    CAS number
    16672-87-0

    Molecular formula
    C2H6ClO3P

    SMILES
    C(CCl)P(=O)(O)O

    Safety labels

    Corrosive
    Corrosive

    Acute Toxic
    Acute Toxic

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Odorless 65.31%
    Sour 25.01%
    Cheesy 24.24%
    Fruity 20.66%
    Savory 20.42%
    Meaty 18.75%
    Sharp 18.08%
    Sweet 17.89%
    Milky 17.82%
    Sulfurous 17.42%

     

    Flavor
    Odorless 71.51%
    Sour 35.29%
    Mild 28.38%
    Acidic 26.58%
    Bland 24.84%
    Yeast 22.34%
    Vinegar 22.2%
    Pungent 21.79%
    Faint 21.65%
    Soy 21.27%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    -1.0

    pKa est.
    7.12 (neutral)

    Molecular weight
    144.49 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Melting point expt.

    • 74-75 °C

    Boiling point

    • 265 °C (decomposes)

    Flash point

    • 153.23 ˚C est.

    Solubility expt.

    • Freely soluble in ethylene glycol, propylene glycol; practically insoluble in petroleum ether
    • VERY SLIGHTLY SOL IN AROMATIC SOLVENTS; VERY SOL IN ALCOHOL
    • Soluble in short-chain alcohols; sparingly soluble in nonpolar organic solvents; insoluble in kerosene and diesel oil.
    • Readily soluble in methanol, ethanol, isopropanol, acetone, diethyl ether and other polar organic solvents. Sparingly soluble in non-polar organic solvents such as benzene and toluene. Insoluble in kerosene and diesel oil.
    • For more Solubility (Complete) data for ETHEPHON (6 total), please visit the HSDB record page.

  • Synonyms

    • ETHEPHON
    • 16672-87-0
    • 2-Chloroethylphosphonic acid
    • (2-Chloroethyl)phosphonic acid
    • Ethrel
    • Bromeflor
    • Camposan
    • Cerone
    • 2-Cepa
    • Ethefon
    • Etheverse
    • Flordimex
    • Kamposan
    • Tomathrel
    • Cepha
    • Ethel
    • Florel
    • 2-Chloroethanephosphonic acid
    • Chloroethylphosphonic acid
    • Roll-Fruct
    • Cepha 10LS
    • Ethrel C
    • Bromoflor
    • Floridex
    • Arvest
    • Ethepon
    • Terpal
    • Gagro
    • CEPA
    • PREP
    • Chipco Florel PRO
    • Amchem 68-250
    • Florel Plant Growth
    • 2-Chloraethyl-phosphonsaeure
    • Acide chloro-2-ethyl-phosphonique
    • G 996
    • XU5R5VQ87S
    • CHEBI:52741
    • beta-chloroethylphosphonic acid
    • RefChem:138390
    • P(33)-(2-chloroethyl)phosphonic acid
    • 240-718-3
    • Chlorethephon
    • Phosphonic acid, (2-chloroethyl)-
    • DTXSID7024085
    • MFCD00002142
    • CEP
    • Ethephon 100 microg/mL in Acetonitrile
    • Ethephon [ANSI]
    • DTXCID804085
    • Caswell No. 426A
    • (2-Chloroethyl) Phosphonic Acid (>85%)
    • CAS-16672-87-0
    • HSDB 2618
    • EINECS 240-718-3
    • 2-Chloraethyl-phosphonsaeure [German]
    • UNII-XU5R5VQ87S
    • EPA Pesticide Chemical Code 099801
    • BRN 1751208
    • Acide chloro-2-ethyl-phosphonique [French]
    • Ethrel-E
    • Ethrel-R (Salt/Mix)
    • ETHEPHON [HSDB]
    • ETHEPHON [MI]
    • Chloroethyl)phosphonic acid
    • 2-Cloroethylphosphonic acid
    • SCHEMBL37574
    • orb2566298
    • SCHEMBL9436890
    • CHEMBL1895474
    • Ethephon, >=96% (titration)
    • MSK24015
    • Tox21_202118
    • Tox21_301134
    • AKOS009031487
    • HY-W131845
    • NCGC00163720-01
    • NCGC00163720-02
    • NCGC00163720-03
    • NCGC00163720-04
    • NCGC00163720-05
    • NCGC00163720-06
    • NCGC00255033-01
    • NCGC00259667-01
    • (P)-(2-CHLOROETHYL)PHOSPHONIC ACID
    • DB-043662
    • CS-0197818
    • Ethephon, PESTANAL(R), analytical standard
    • NS00001210
    • EN300-19733
    • C18399
    • T70393
    • (2-Chloroethyl) Phosphonic Acid (>85per cent)
    • 672C870
    • Q209355
    • 16672-87-0

  • Applications

    Ethephon (CAS 16672-87-0) is a plant growth regulator that releases ethylene upon hydrolysis and is widely used in agriculture and horticulture to control the timing of fruit ripening and, for some crops, to influence flowering and abscission processes to aid harvest scheduling. Real-world applications include accelerating post-harvest ripening of climacteric fruits such as bananas, mangoes, pineapples, and avocados; triggering flowering in select crops to optimize production cycles; and promoting fruit or leaf abscission to facilitate harvest operations. Applications are typically implemented as foliar sprays with crop-specific timing and rates, and use is subject to local regulations and formulation guidelines.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 163.45
    methanol 325.62
    isopropanol 99.63
    water 1515.18
    ethyl acetate 6.74
    n-propanol 88.21
    acetone 76.66
    n-butanol 53.98
    acetonitrile 17.15
    DMF 325.66
    toluene 3.67
    isobutanol 45.81
    1,4-dioxane 47.01
    methyl acetate 9.63
    THF 115.84
    2-butanone 17.68
    n-pentanol 40.85
    sec-butanol 42.2
    n-hexane 6.3
    ethylene glycol 317.91
    NMP 168.08
    cyclohexane 8.26
    DMSO 275.32
    n-butyl acetate 9.52
    n-octanol 17.59
    chloroform 3.57
    n-propyl acetate 10.6
    acetic acid 101.28
    dichloromethane 5.61
    cyclohexanone 28.83
    propylene glycol 182.61
    isopropyl acetate 8.09
    DMAc 131.36
    2-ethoxyethanol 147.58
    isopentanol 34.58
    n-heptane 7.23
    ethyl formate 20.47
    1,2-dichloroethane 7.75
    n-hexanol 33.14
    2-methoxyethanol 255.54
    isobutyl acetate 6.43
    tetrachloromethane 3.12
    n-pentyl acetate 10.47
    transcutol 87.57
    n-heptanol 29.19
    ethylbenzene 2.96
    MIBK 17.77
    2-propoxyethanol 104.05
    tert-butanol 90.3
    MTBE 14.35
    2-butoxyethanol 75.31
    propionic acid 40.49
    o-xylene 5.39
    formic acid 313.03
    diethyl ether 17.3
    m-xylene 5.27
    p-xylene 3.92
    chlorobenzene 2.13
    dimethyl carbonate 15.82
    n-octane 3.05
    formamide 316.45
    cyclopentanone 56.67
    2-pentanone 20.91
    anisole 9.07
    cyclopentyl methyl ether 35.06
    gamma-butyrolactone 52.65
    1-methoxy-2-propanol 157.96
    pyridine 13.54
    3-pentanone 11.86
    furfural 51.94
    n-dodecane 1.61
    diethylene glycol 166.21
    diisopropyl ether 7.81
    tert-amyl alcohol 44.98
    acetylacetone 24.92
    n-hexadecane 1.69
    acetophenone 11.56
    methyl propionate 12.11
    isopentyl acetate 8.03
    trichloroethylene 5.64
    n-nonanol 16.26
    cyclohexanol 32.0
    benzyl alcohol 16.89
    2-ethylhexanol 13.8
    isooctanol 19.78
    dipropyl ether 18.85
    1,2-dichlorobenzene 2.55
    ethyl lactate 22.83
    propylene carbonate 21.0
    n-methylformamide 163.57
    2-pentanol 30.91
    n-pentane 8.07
    1-propoxy-2-propanol 61.13
    1-methoxy-2-propyl acetate 17.58
    2-(2-methoxypropoxy) propanol 40.4
    mesitylene 5.89
    ε-caprolactone 21.61
    p-cymene 4.57
    epichlorohydrin 31.42
    1,1,1-trichloroethane 3.2
    2-aminoethanol 317.25
    morpholine-4-carbaldehyde 135.44
    sulfolane 100.66
    2,2,4-trimethylpentane 2.26
    2-methyltetrahydrofuran 33.58
    n-hexyl acetate 10.64
    isooctane 2.56
    2-(2-butoxyethoxy)ethanol 61.27
    sec-butyl acetate 6.05
    tert-butyl acetate 12.49
    decalin 2.39
    glycerin 296.77
    diglyme 97.22
    acrylic acid 49.15
    isopropyl myristate 5.94
    n-butyric acid 30.12
    acetyl acetate 5.74
    di(2-ethylhexyl) phthalate 9.92
    ethyl propionate 8.68
    nitromethane 74.39
    1,2-diethoxyethane 16.5
    benzonitrile 6.27
    trioctyl phosphate 9.5
    1-bromopropane 4.16
    gamma-valerolactone 78.81
    n-decanol 12.71
    triethyl phosphate 8.07
    4-methyl-2-pentanol 19.86
    propionitrile 9.73
    vinylene carbonate 15.93
    1,1,2-trichlorotrifluoroethane 53.95
    DMS 6.86
    cumene 3.8
    2-octanol 15.21
    2-hexanone 15.33
    octyl acetate 8.25
    limonene 6.35
    1,2-dimethoxyethane 116.74
    ethyl orthosilicate 8.34
    tributyl phosphate 7.73
    diacetone alcohol 42.42
    N,N-dimethylaniline 16.76
    acrylonitrile 13.71
    aniline 11.54
    1,3-propanediol 178.48
    bromobenzene 1.35
    dibromomethane 4.55
    1,1,2,2-tetrachloroethane 7.58
    2-methyl-cyclohexyl acetate 10.52
    tetrabutyl urea 16.21
    diisobutyl methanol 11.26
    2-phenylethanol 16.12
    styrene 2.85
    dioctyl adipate 10.15
    dimethyl sulfate 35.7
    ethyl butyrate 9.56
    methyl lactate 40.52
    butyl lactate 21.22
    diethyl carbonate 6.12
    propanediol butyl ether 65.54
    triethyl orthoformate 10.38
    p-tert-butyltoluene 5.25
    methyl 4-tert-butylbenzoate 24.22
    morpholine 73.67
    tert-butylamine 46.61
    n-dodecanol 9.91
    dimethoxymethane 118.86
    ethylene carbonate 14.64
    cyrene 57.19
    2-ethoxyethyl acetate 11.78
    2-ethylhexyl acetate 6.21
    1,2,4-trichlorobenzene 2.84
    4-methylpyridine 11.29
    dibutyl ether 8.04
    2,6-dimethyl-4-heptanol 11.26
    DEF 36.47
    dimethyl isosorbide 52.98
    tetrachloroethylene 8.07
    eugenol 35.62
    triacetin 14.37
    span 80 38.98
    1,4-butanediol 111.95
    1,1-dichloroethane 3.75
    2-methyl-1-pentanol 21.42
    methyl formate 96.1
    2-methyl-1-butanol 29.73
    n-decane 2.52
    butyronitrile 10.73
    3,7-dimethyl-1-octanol 11.59
    1-chlorooctane 4.07
    1-chlorotetradecane 2.33
    n-nonane 2.77
    undecane 1.93
    tert-butylcyclohexane 2.17
    cyclooctane 4.38
    cyclopentanol 64.75
    tetrahydropyran 24.71
    tert-amyl methyl ether 12.61
    2,5,8-trioxanonane 74.89
    1-hexene 7.75
    2-isopropoxyethanol 72.38
    2,2,2-trifluoroethanol 66.49
    methyl butyrate 13.49

    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