2,4,6-Tri-tert-butylphenyl cyclic butylethylpropanediyl phosphite

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  • Identifiers

    CAS number
    161717-32-4

    Molecular formula
    C27H47O3P

    SMILES
    CCCCC1(COP(OC1)OC2=C(C=C(C=C2C(C)(C)C)C(C)(C)C)C(C)(C)C)CC

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Woody 61.92%
    Dry 36.71%
    Amber 36.04%
    Green 35.71%
    Spicy 34.17%
    Vetiver 33.88%
    Herbal 32.0%
    Leathery 31.28%
    Musk 29.63%
    Earthy 27.75%

     

    Flavor
    Musty 30.59%
    Camphor 29.28%
    Earth 29.21%
    Green 27.7%
    Spice 27.68%
    Earthy 27.55%
    Mild 26.32%
    Woody 25.93%
    Pepper 25.16%
    Herbal 23.64%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    9.7

    pKa est.
    6.13 (neutral)

    Molecular weight
    450.6 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    446°C

    Flash point

    • 172.74 ˚C est.

  • Synonyms

    • 161717-32-4
    • Ultranox 641
    • 1,3,2-Dioxaphosphorinane, 5-butyl-5-ethyl-2-[2,4,6-tris(1,1-dimethylethyl)phenoxy]-
    • 038VMC282G
    • 2,4,6-Tri-tert-butylphenyl cyclic butylethylpropanediyl phosphite
    • PHOSPHOROUS ACID, CYCLIC BUTYLETHYL
    • 1,3,2-Dioxaphosphorinane, 5-butyl-5-ethyl-2-(2,4,6-tris(1,1-dimethylethyl)phenoxy)-
    • EC 423-560-1
    • 2,4,6-tri-tert-butylphenyl 2-butyl-2-ethyl-1,3-propanediolphosphite
    • 2,4,6,-TRI-TERT-BUTYLPHENYL CYCLIC BUTYLETHYLPROPANE
    • BUTYL-5-ETHYL-2-(2,4,6-TRIS(1,1-DIMETHYLETHYL)PHENOXY)-1,3,2-DIOXAPHOSPHORINANE, 5-
    • RefChem:442860
    • 423-560-1
    • 5-butyl-5-ethyl-2-(2,4,6-tritert-butylphenoxy)-1,3,2-dioxaphosphinane
    • UNII-038VMC282G
    • 1,3,2-Dioxaphosphorinane,5-butyl-5-ethyl-2-[2,4,6-tris(1,1-dimethylethyl)phenoxy]-
    • SCHEMBL1246434
    • DTXSID7051767
    • SCHEMBL16142420
    • 5-butyl-5-ethyl-2-(2,4,6-tri-tert-butylphenoxy)-1,3,2-dioxaphosphinane
    • NS00007582
    • Q27247542
    • 1,3,2-DIOXAPHOSPHORINANE, 5-BUTYL-5-ETHYL-2-(2,4,6-TRIS(1,1- DIMETHYLETHYL)PHENOXY)-
    • 161717-32-4

  • Applications

    2,4,6-Tri-tert-butylphenyl cyclic butylethylpropanediyl phosphite (CAS 161717-32-4) is a multifunctional organophosphite stabilizer used primarily to protect polymers from oxidative degradation during processing and service. It is commonly employed as a processing antioxidant and hydroperoxide scavenger for plastics such as polyolefins and PVC, helping to extend melt processing windows and reduce color formation. In coatings and inks, it serves as a stabilizer that improves resin longevity under reactive curing conditions. It is also used in adhesive formulations to enhance oxidative stability and may be added to lubricants and hydraulic fluids as an antioxidant/stabilizer. Additionally, it can function as an intermediate in the synthesis of other organophosphite esters for specialty polymers and electronics-related encapsulation materials, subject to formulation limits and regulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 60.28
    methanol 17.78
    isopropanol 74.39
    water 0.2
    ethyl acetate 156.97
    n-propanol 91.49
    acetone 184.5
    n-butanol 94.45
    acetonitrile 61.27
    DMF 221.5
    toluene 209.85
    isobutanol 90.03
    1,4-dioxane 234.37
    methyl acetate 137.48
    THF 584.35
    2-butanone 239.12
    n-pentanol 123.86
    sec-butanol 116.84
    n-hexane 29.8
    ethylene glycol 8.18
    NMP 511.61
    cyclohexane 37.52
    DMSO 145.98
    n-butyl acetate 256.71
    n-octanol 116.82
    chloroform 702.71
    n-propyl acetate 195.44
    acetic acid 100.63
    dichloromethane 512.4
    cyclohexanone 413.84
    propylene glycol 38.75
    isopropyl acetate 158.92
    DMAc 346.88
    2-ethoxyethanol 138.71
    isopentanol 102.71
    n-heptane 31.67
    ethyl formate 100.64
    1,2-dichloroethane 292.64
    n-hexanol 137.98
    2-methoxyethanol 112.2
    isobutyl acetate 197.93
    tetrachloromethane 88.52
    n-pentyl acetate 267.79
    transcutol 312.12
    n-heptanol 134.46
    ethylbenzene 144.07
    MIBK 165.64
    2-propoxyethanol 204.92
    tert-butanol 105.65
    MTBE 142.61
    2-butoxyethanol 222.98
    propionic acid 109.68
    o-xylene 135.57
    formic acid 16.2
    diethyl ether 109.42
    m-xylene 156.33
    p-xylene 219.45
    chlorobenzene 292.2
    dimethyl carbonate 84.09
    n-octane 19.35
    formamide 34.07
    cyclopentanone 538.37
    2-pentanone 209.25
    anisole 217.41
    cyclopentyl methyl ether 278.55
    gamma-butyrolactone 477.78
    1-methoxy-2-propanol 155.19
    pyridine 365.09
    3-pentanone 163.22
    furfural 364.39
    n-dodecane 13.09
    diethylene glycol 76.13
    diisopropyl ether 62.14
    tert-amyl alcohol 133.72
    acetylacetone 243.7
    n-hexadecane 15.42
    acetophenone 250.21
    methyl propionate 146.49
    isopentyl acetate 273.85
    trichloroethylene 664.36
    n-nonanol 119.86
    cyclohexanol 143.24
    benzyl alcohol 174.85
    2-ethylhexanol 133.42
    isooctanol 131.2
    dipropyl ether 138.14
    1,2-dichlorobenzene 263.23
    ethyl lactate 113.47
    propylene carbonate 325.39
    n-methylformamide 87.07
    2-pentanol 96.95
    n-pentane 21.43
    1-propoxy-2-propanol 214.57
    1-methoxy-2-propyl acetate 254.34
    2-(2-methoxypropoxy) propanol 189.82
    mesitylene 97.04
    ε-caprolactone 400.89
    p-cymene 111.89
    epichlorohydrin 491.58
    1,1,1-trichloroethane 359.9
    2-aminoethanol 32.28
    morpholine-4-carbaldehyde 383.18
    sulfolane 544.17
    2,2,4-trimethylpentane 20.77
    2-methyltetrahydrofuran 414.18
    n-hexyl acetate 272.89
    isooctane 15.89
    2-(2-butoxyethoxy)ethanol 234.51
    sec-butyl acetate 171.27
    tert-butyl acetate 206.14
    decalin 34.66
    glycerin 40.24
    diglyme 351.88
    acrylic acid 89.65
    isopropyl myristate 123.07
    n-butyric acid 170.57
    acetyl acetate 118.01
    di(2-ethylhexyl) phthalate 144.56
    ethyl propionate 151.4
    nitromethane 159.98
    1,2-diethoxyethane 185.01
    benzonitrile 203.1
    trioctyl phosphate 108.38
    1-bromopropane 199.29
    gamma-valerolactone 630.03
    n-decanol 89.78
    triethyl phosphate 111.04
    4-methyl-2-pentanol 79.64
    propionitrile 85.84
    vinylene carbonate 251.7
    1,1,2-trichlorotrifluoroethane 334.22
    DMS 166.86
    cumene 107.57
    2-octanol 118.21
    2-hexanone 236.67
    octyl acetate 156.46
    limonene 136.22
    1,2-dimethoxyethane 222.89
    ethyl orthosilicate 118.04
    tributyl phosphate 113.2
    diacetone alcohol 209.8
    N,N-dimethylaniline 185.48
    acrylonitrile 91.07
    aniline 174.22
    1,3-propanediol 56.31
    bromobenzene 343.08
    dibromomethane 369.35
    1,1,2,2-tetrachloroethane 589.9
    2-methyl-cyclohexyl acetate 242.18
    tetrabutyl urea 156.69
    diisobutyl methanol 81.58
    2-phenylethanol 212.65
    styrene 160.77
    dioctyl adipate 178.73
    dimethyl sulfate 144.77
    ethyl butyrate 191.81
    methyl lactate 97.16
    butyl lactate 224.27
    diethyl carbonate 119.38
    propanediol butyl ether 204.35
    triethyl orthoformate 173.68
    p-tert-butyltoluene 113.12
    methyl 4-tert-butylbenzoate 272.58
    morpholine 309.81
    tert-butylamine 75.55
    n-dodecanol 66.79
    dimethoxymethane 144.57
    ethylene carbonate 199.45
    cyrene 276.39
    2-ethoxyethyl acetate 264.55
    2-ethylhexyl acetate 248.82
    1,2,4-trichlorobenzene 336.04
    4-methylpyridine 376.15
    dibutyl ether 126.93
    2,6-dimethyl-4-heptanol 81.58
    DEF 205.34
    dimethyl isosorbide 383.62
    tetrachloroethylene 278.57
    eugenol 245.95
    triacetin 251.3
    span 80 232.63
    1,4-butanediol 42.4
    1,1-dichloroethane 321.03
    2-methyl-1-pentanol 133.71
    methyl formate 73.47
    2-methyl-1-butanol 107.27
    n-decane 24.31
    butyronitrile 112.74
    3,7-dimethyl-1-octanol 116.17
    1-chlorooctane 101.56
    1-chlorotetradecane 41.32
    n-nonane 22.76
    undecane 17.22
    tert-butylcyclohexane 35.23
    cyclooctane 19.48
    cyclopentanol 184.77
    tetrahydropyran 294.6
    tert-amyl methyl ether 137.56
    2,5,8-trioxanonane 226.52
    1-hexene 95.93
    2-isopropoxyethanol 146.59
    2,2,2-trifluoroethanol 50.62
    methyl butyrate 205.5

    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