Phosphorous acid, trioctadecyl ester

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  • Identifiers

    CAS number
    2082-80-6

    Molecular formula
    C54H111O3P

    SMILES
    CCCCCCCCCCCCCCCCCCOP(OCCCCCCCCCCCCCCCCCC)OCCCCCCCCCCCCCCCCCC

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Waxy 69.13%
    Fatty 46.76%
    Oily 42.44%
    Odorless 28.79%
    Fresh 20.66%
    Fruity 20.02%
    Sweet 19.93%
    Clean 19.46%
    Fishy 19.22%
    Balsamic 18.95%

     

    Flavor
    Waxy 45.89%
    Bland 35.24%
    Mild 33.59%
    Alkane 30.79%
    Fatty 27.24%
    Faint 26.74%
    Slightly waxy 23.12%
    Delicate 21.91%
    Bay oil 20.66%
    Beer 20.43%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    26.6

    pKa est.
    10.56 (weak base)

    Molecular weight
    839.4 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    702°C

    Flash point

    • 369.59 ˚C est.

  • Synonyms

    • Trioctadecyl phosphite
    • Tristearyl phosphite
    • Phosphorous acid, trioctadecyl ester
    • Tris(octadecyl)phosphite
    • Tris(octadecyl) phosphite
    • Chelex S
    • Weston TSP
    • Octadecyl phosphite, (C18H37O3)3P
    • CNUJLMSKURPSHE-UHFFFAOYSA-
    • DTXSID20883791
    • EINECS 218-217-6
    • JP 318
    • NSC 65487
    • RefChem:173914
    • DTXCID701023278
    • 218-217-6
    • InChI=1/C54H111O3P/c1-4-7-10-13-16-19-22-25-28-31-34-37-40-43-46-49-52-55-58(56-53-50-47-44-41-38-35-32-29-26-23-20-17-14-11-8-5-2)57-54-51-48-45-42-39-36-33-30-27-24-21-18-15-12-9-6-3/h4-54H2,1-3H3
    • 2082-80-6
    • Phosphorous acid tri-n-octadecyl ester
    • PHOSPHOROUSACIDTRI-N-OCTADECYLESTER
    • Trioctadecylphosphit
    • Phosphorous Acid Trioctadecyl Ester
    • SCHEMBL39064
    • Phosphorous Acid Tristearyl Ester
    • NSC65487
    • NSC-65487
    • AKOS024429347
    • NS00045355
    • T0501
    • 2082-80-6

  • Applications

    Phosphorous acid, trioctadecyl ester, CAS 2082-80-6 is used primarily as a processing stabilizer and antioxidant in polymer systems (notably PVC and polyolefins), helping to scavenge hydroperoxides and improve thermal stability during melt processing and storage. It is also applied as a stabilizer in coatings and inks to enhance durability and oxidative resistance, and as an additive in adhesives to stabilize the formulation. In lubricant and industrial oil formulations, it can act as an antioxidant additive to extend oxidation life. Additionally, it may serve as a processing aid due to its long octadecyl chain, improving compatibility and handling in certain polymer formulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 13.92
    methanol 11.51
    isopropanol 18.91
    water 0.39
    ethyl acetate 253.47
    n-propanol 29.6
    acetone 111.14
    n-butanol 35.98
    acetonitrile 34.41
    DMF 173.41
    toluene 139.61
    isobutanol 36.31
    1,4-dioxane 187.47
    methyl acetate 143.77
    THF 580.93
    2-butanone 196.1
    n-pentanol 39.08
    sec-butanol 46.21
    n-hexane 42.52
    ethylene glycol 2.46
    NMP 785.73
    cyclohexane 174.46
    DMSO 206.48
    n-butyl acetate 288.54
    n-octanol 91.62
    chloroform 845.71
    n-propyl acetate 255.23
    acetic acid 75.36
    dichloromethane 764.11
    cyclohexanone 668.29
    propylene glycol 7.41
    isopropyl acetate 264.66
    DMAc 455.51
    2-ethoxyethanol 70.39
    isopentanol 50.98
    n-heptane 68.62
    ethyl formate 95.05
    1,2-dichloroethane 419.3
    n-hexanol 42.37
    2-methoxyethanol 59.05
    isobutyl acetate 194.12
    tetrachloromethane 265.17
    n-pentyl acetate 561.43
    transcutol 374.41
    n-heptanol 81.11
    ethylbenzene 101.6
    MIBK 196.14
    2-propoxyethanol 89.24
    tert-butanol 42.23
    MTBE 150.8
    2-butoxyethanol 164.11
    propionic acid 84.55
    o-xylene 147.57
    formic acid 16.0
    diethyl ether 110.24
    m-xylene 117.79
    p-xylene 141.29
    chlorobenzene 245.34
    dimethyl carbonate 116.17
    n-octane 40.84
    formamide 30.35
    cyclopentanone 687.04
    2-pentanone 213.46
    anisole 152.7
    cyclopentyl methyl ether 466.92
    gamma-butyrolactone 699.12
    1-methoxy-2-propanol 83.04
    pyridine 262.3
    3-pentanone 250.34
    furfural 400.43
    n-dodecane 17.98
    diethylene glycol 28.19
    diisopropyl ether 101.32
    tert-amyl alcohol 87.79
    acetylacetone 327.71
    n-hexadecane 21.9
    acetophenone 242.26
    methyl propionate 210.23
    isopentyl acetate 306.29
    trichloroethylene 858.09
    n-nonanol 97.2
    cyclohexanol 141.13
    benzyl alcohol 74.99
    2-ethylhexanol 78.89
    isooctanol 95.4
    dipropyl ether 214.23
    1,2-dichlorobenzene 335.22
    ethyl lactate 108.16
    propylene carbonate 458.09
    n-methylformamide 66.18
    2-pentanol 47.3
    n-pentane 30.11
    1-propoxy-2-propanol 136.97
    1-methoxy-2-propyl acetate 284.74
    2-(2-methoxypropoxy) propanol 149.18
    mesitylene 111.86
    ε-caprolactone 694.92
    p-cymene 123.47
    epichlorohydrin 586.57
    1,1,1-trichloroethane 678.72
    2-aminoethanol 9.56
    morpholine-4-carbaldehyde 362.4
    sulfolane 1147.32
    2,2,4-trimethylpentane 48.76
    2-methyltetrahydrofuran 501.88
    n-hexyl acetate 430.66
    isooctane 23.65
    2-(2-butoxyethoxy)ethanol 167.25
    sec-butyl acetate 257.7
    tert-butyl acetate 385.45
    decalin 80.72
    glycerin 14.89
    diglyme 475.93
    acrylic acid 64.23
    isopropyl myristate 153.69
    n-butyric acid 178.86
    acetyl acetate 236.22
    di(2-ethylhexyl) phthalate 114.31
    ethyl propionate 266.83
    nitromethane 173.66
    1,2-diethoxyethane 283.14
    benzonitrile 117.84
    trioctyl phosphate 95.29
    1-bromopropane 262.39
    gamma-valerolactone 710.89
    n-decanol 60.25
    triethyl phosphate 236.28
    4-methyl-2-pentanol 45.1
    propionitrile 55.07
    vinylene carbonate 342.62
    1,1,2-trichlorotrifluoroethane 408.86
    DMS 240.54
    cumene 83.51
    2-octanol 94.24
    2-hexanone 209.61
    octyl acetate 178.83
    limonene 220.08
    1,2-dimethoxyethane 199.61
    ethyl orthosilicate 241.33
    tributyl phosphate 129.88
    diacetone alcohol 214.64
    N,N-dimethylaniline 147.84
    acrylonitrile 53.77
    aniline 103.69
    1,3-propanediol 20.44
    bromobenzene 350.08
    dibromomethane 489.67
    1,1,2,2-tetrachloroethane 868.33
    2-methyl-cyclohexyl acetate 327.69
    tetrabutyl urea 192.97
    diisobutyl methanol 78.77
    2-phenylethanol 76.3
    styrene 107.56
    dioctyl adipate 235.81
    dimethyl sulfate 300.96
    ethyl butyrate 350.56
    methyl lactate 88.02
    butyl lactate 289.57
    diethyl carbonate 203.68
    propanediol butyl ether 105.95
    triethyl orthoformate 340.62
    p-tert-butyltoluene 117.96
    methyl 4-tert-butylbenzoate 364.95
    morpholine 221.54
    tert-butylamine 38.88
    n-dodecanol 41.96
    dimethoxymethane 144.77
    ethylene carbonate 330.07
    cyrene 209.8
    2-ethoxyethyl acetate 480.12
    2-ethylhexyl acetate 324.52
    1,2,4-trichlorobenzene 415.2
    4-methylpyridine 261.84
    dibutyl ether 253.31
    2,6-dimethyl-4-heptanol 78.77
    DEF 307.95
    dimethyl isosorbide 430.79
    tetrachloroethylene 529.34
    eugenol 196.03
    triacetin 474.2
    span 80 164.68
    1,4-butanediol 12.15
    1,1-dichloroethane 361.97
    2-methyl-1-pentanol 59.27
    methyl formate 60.72
    2-methyl-1-butanol 57.57
    n-decane 45.48
    butyronitrile 65.98
    3,7-dimethyl-1-octanol 97.33
    1-chlorooctane 162.22
    1-chlorotetradecane 46.85
    n-nonane 45.31
    undecane 26.14
    tert-butylcyclohexane 59.34
    cyclooctane 84.34
    cyclopentanol 140.32
    tetrahydropyran 352.77
    tert-amyl methyl ether 215.23
    2,5,8-trioxanonane 243.9
    1-hexene 73.01
    2-isopropoxyethanol 73.73
    2,2,2-trifluoroethanol 70.66
    methyl butyrate 320.86

    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