Bisphenylhexamethicone

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  • Identifiers

    CAS number
    18758-91-3

    Molecular formula
    C24H46O5Si6

    SMILES
    C[Si](C)(C)O[Si](C1=CC=CC=C1)(O[Si](C)(C)C)O[Si](C2=CC=CC=C2)(O[Si](C)(C)C)O[Si](C)(C)C

    Safety labels

  • Odor profile

    Fragrance
    Green 43.72%
    Floral 42.08%
    Fruity 30.1%
    Fresh 27.52%
    Odorless 26.29%
    Mint 26.27%
    Sweet 26.09%
    Woody 25.6%
    Herbal 24.92%
    Rose 24.19%

     

    Flavor
    Bitter 44.4%
    Green 31.28%
    Mild 26.14%
    Fruity 23.05%
    Herbal 19.89%
    Old wood 19.65%
    Sweet 19.49%
    Rose acetate 19.44%
    Fir 19.44%
    Hummus 19.0%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    8.92 (weak base)

    Molecular weight
    583.1 g/mol

    Flash point

    • 171.13 ˚C est.

  • Synonyms

    • Bisphenylhexamethicone
    • 18758-91-3
    • UNII-M10QI69BSD
    • M10QI69BSD
    • DIPHENYLHEXAMETHICONE
    • Tetrakis(trimethylsilyloxy)-1,3-diphenyldisiloxane
    • DTXSID90172068
    • 1,1,1,7,7,7-Hexamethyl-3,5-diphenyl-3,5-bis(trimethylsilyloxy)tetrasiloxane
    • Tetrasiloxane, 1,1,1,7,7,7-hexamethyl-3,5-diphenyl-3,5-bis(trimethylsiloxy)-
    • RefChem:120504
    • DTXCID7094559
    • BISPHENYLHEXAMETHICONE [INCI]
    • trimethyl-[phenyl-[phenyl-bis(trimethylsilyloxy)silyl]oxy-trimethylsilyloxysilyl]oxysilane
    • Tetrasiloxane, 1,1,1,7,7,7-hexamethyl-3,5-diphenyl-3,5-bis((trimethylsilyl)oxy)-
    • C24H46O5Si6
    • SCHEMBL6546676
    • WZKPOPMJOWWSBZ-UHFFFAOYSA-N
    • Q27283325
    • 1,1,1,7,7,7-Hexamethyl-3,5-diphenyl-3,5-bis[(trimethylsilyl)oxy]tetrasiloxane
    • 18758-91-3

  • Applications

    Bisphenylhexamethicone (CAS 18758-91-3) is used as a siloxane-based additive across cosmetics/personal care, coatings/inks and polymers/plastics. In cosmetics and personal care, it provides slip and conditioning, improving spreadability and texture. In coatings and inks, it acts as a surface-leveling and gloss-enhancing additive and flow modifier. In polymer and plastic formulations, it functions as a processing aid and compatibility modifier, helping lubricity and processing at elevated temperatures. In adhesives and sealants, it can reduce surface energy and improve glide during assembly. It may also be evaluated for electronic applications as a dielectric or insulating component in specialized formulations. Use is formulation-dependent and subject to local regulations and product testing.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 338.39
    methanol 262.62
    isopropanol 304.05
    water 7.77
    ethyl acetate 520.01
    n-propanol 363.21
    acetone 822.42
    n-butanol 307.38
    acetonitrile 221.74
    DMF 2181.79
    toluene 396.18
    isobutanol 293.6
    1,4-dioxane 641.4
    methyl acetate 516.55
    THF 2338.34
    2-butanone 720.91
    n-pentanol 247.71
    sec-butanol 320.98
    n-hexane 77.82
    ethylene glycol 120.12
    NMP 3271.8
    cyclohexane 113.53
    DMSO 1408.85
    n-butyl acetate 532.97
    n-octanol 236.28
    chloroform 1633.84
    n-propyl acetate 454.86
    acetic acid 630.62
    dichloromethane 1311.93
    cyclohexanone 1246.14
    propylene glycol 296.13
    isopropyl acetate 474.56
    DMAc 1895.55
    2-ethoxyethanol 376.33
    isopentanol 244.72
    n-heptane 79.92
    ethyl formate 402.73
    1,2-dichloroethane 776.84
    n-hexanol 278.69
    2-methoxyethanol 635.23
    isobutyl acetate 380.64
    tetrachloromethane 226.34
    n-pentyl acetate 528.99
    transcutol 721.22
    n-heptanol 255.55
    ethylbenzene 189.51
    MIBK 461.23
    2-propoxyethanol 603.23
    tert-butanol 321.12
    MTBE 321.14
    2-butoxyethanol 498.4
    propionic acid 543.52
    o-xylene 232.3
    formic acid 250.78
    diethyl ether 322.72
    m-xylene 284.66
    p-xylene 254.47
    chlorobenzene 596.08
    dimethyl carbonate 598.11
    n-octane 40.84
    formamide 379.93
    cyclopentanone 2160.83
    2-pentanone 674.48
    anisole 391.98
    cyclopentyl methyl ether 963.46
    gamma-butyrolactone 2415.17
    1-methoxy-2-propanol 678.14
    pyridine 925.68
    3-pentanone 565.66
    furfural 1554.19
    n-dodecane 31.11
    diethylene glycol 302.28
    diisopropyl ether 151.04
    tert-amyl alcohol 306.07
    acetylacetone 914.49
    n-hexadecane 34.47
    acetophenone 508.37
    methyl propionate 700.41
    isopentyl acetate 468.64
    trichloroethylene 1929.02
    n-nonanol 232.72
    cyclohexanol 398.31
    benzyl alcohol 325.56
    2-ethylhexanol 217.23
    isooctanol 215.13
    dipropyl ether 373.92
    1,2-dichlorobenzene 538.28
    ethyl lactate 339.66
    propylene carbonate 1320.66
    n-methylformamide 791.19
    2-pentanol 257.02
    n-pentane 78.29
    1-propoxy-2-propanol 537.29
    1-methoxy-2-propyl acetate 694.63
    2-(2-methoxypropoxy) propanol 440.75
    mesitylene 179.29
    ε-caprolactone 1175.92
    p-cymene 154.37
    epichlorohydrin 1705.87
    1,1,1-trichloroethane 794.54
    2-aminoethanol 269.44
    morpholine-4-carbaldehyde 1651.94
    sulfolane 3436.4
    2,2,4-trimethylpentane 45.44
    2-methyltetrahydrofuran 1124.17
    n-hexyl acetate 588.84
    isooctane 35.18
    2-(2-butoxyethoxy)ethanol 531.3
    sec-butyl acetate 354.88
    tert-butyl acetate 546.38
    decalin 61.18
    glycerin 382.26
    diglyme 844.76
    acrylic acid 558.06
    isopropyl myristate 249.46
    n-butyric acid 627.32
    acetyl acetate 407.76
    di(2-ethylhexyl) phthalate 300.57
    ethyl propionate 458.5
    nitromethane 1065.99
    1,2-diethoxyethane 364.22
    benzonitrile 404.17
    trioctyl phosphate 243.13
    1-bromopropane 477.58
    gamma-valerolactone 2250.39
    n-decanol 176.56
    triethyl phosphate 282.61
    4-methyl-2-pentanol 174.48
    propionitrile 283.33
    vinylene carbonate 1078.26
    1,1,2-trichlorotrifluoroethane 1365.41
    DMS 575.6
    cumene 136.64
    2-octanol 204.28
    2-hexanone 469.32
    octyl acetate 350.48
    limonene 231.76
    1,2-dimethoxyethane 638.02
    ethyl orthosilicate 272.71
    tributyl phosphate 265.2
    diacetone alcohol 594.73
    N,N-dimethylaniline 365.62
    acrylonitrile 373.79
    aniline 451.27
    1,3-propanediol 301.39
    bromobenzene 619.91
    dibromomethane 883.37
    1,1,2,2-tetrachloroethane 1512.44
    2-methyl-cyclohexyl acetate 429.15
    tetrabutyl urea 409.41
    diisobutyl methanol 142.88
    2-phenylethanol 358.9
    styrene 246.25
    dioctyl adipate 395.4
    dimethyl sulfate 1228.06
    ethyl butyrate 463.86
    methyl lactate 591.85
    butyl lactate 507.26
    diethyl carbonate 316.0
    propanediol butyl ether 500.6
    triethyl orthoformate 403.8
    p-tert-butyltoluene 169.3
    methyl 4-tert-butylbenzoate 615.8
    morpholine 948.19
    tert-butylamine 200.43
    n-dodecanol 134.78
    dimethoxymethane 981.86
    ethylene carbonate 849.73
    cyrene 659.66
    2-ethoxyethyl acetate 603.7
    2-ethylhexyl acetate 409.87
    1,2,4-trichlorobenzene 728.0
    4-methylpyridine 850.09
    dibutyl ether 265.29
    2,6-dimethyl-4-heptanol 142.88
    DEF 836.75
    dimethyl isosorbide 937.73
    tetrachloroethylene 801.93
    eugenol 527.67
    triacetin 650.6
    span 80 576.49
    1,4-butanediol 139.15
    1,1-dichloroethane 727.13
    2-methyl-1-pentanol 211.79
    methyl formate 671.95
    2-methyl-1-butanol 276.51
    n-decane 53.4
    butyronitrile 303.29
    3,7-dimethyl-1-octanol 195.06
    1-chlorooctane 199.32
    1-chlorotetradecane 87.36
    n-nonane 50.87
    undecane 39.13
    tert-butylcyclohexane 58.3
    cyclooctane 56.12
    cyclopentanol 649.52
    tetrahydropyran 801.72
    tert-amyl methyl ether 339.35
    2,5,8-trioxanonane 589.65
    1-hexene 200.69
    2-isopropoxyethanol 297.68
    2,2,2-trifluoroethanol 364.48
    methyl butyrate 581.83

    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