Caprylyl trisiloxane

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  • Identifiers

    CAS number
    17955-88-3

    Molecular formula
    C15H38O2Si3

    SMILES
    CCCCCCCC[Si](C)(O[Si](C)(C)C)O[Si](C)(C)C

    Safety labels

  • Odor profile

    Fragrance
    Floral 49.73%
    Woody 40.08%
    Fresh 36.42%
    Green 34.85%
    Citrus 34.52%
    Mint 27.85%
    Sweet 27.79%
    Rose 27.18%
    Lily 26.94%
    Herbal 26.69%

     

    Flavor
    Green 45.22%
    Mild 32.46%
    Floral 27.35%
    Earthy 27.27%
    Oily 25.93%
    Waxy 25.65%
    Lily 25.51%
    Rose acetate 22.67%
    Yeasty 21.48%
    Catty 21.31%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    8.96 (weak base)

    Molecular weight
    334.72 g/mol

    Flash point

    • 104.12 ˚C est.

  • Synonyms

    • 17955-88-3
    • 1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane
    • Caprylyl trisiloxane
    • Caprylyl methicone
    • Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-3-octyl-
    • EINECS 241-881-3
    • Q95M2P1KJL
    • heptamethyloctyltrisiloxane
    • octylheptamethyltrisiloxane
    • SILSOFT 034
    • SILCARE 41M15
    • BRB CAPRYLYL METHICONE
    • DTXSID6051807
    • SS 3408
    • BIS(TRIMETHYLSILOXY)OCTYLMETHYLSILANE
    • RefChem:573792
    • DTXCID6030362
    • CAPRYLYL METHICONE [INCI]
    • CAPRYLYL TRISILOXANE [INCI]
    • 241-881-3
    • 3-OCTYLHEPTAMETHYLTRISILOXANE
    • trimethyl-(methyl-octyl-trimethylsilyloxysilyl)oxysilane
    • MFCD08275351
    • UNII-Q95M2P1KJL
    • C15H38O2Si3
    • 3-Ctylheptamethyltrisiloxane
    • SCHEMBL727806
    • SCHEMBL15161829
    • SCRSFLUHMDMRFP-UHFFFAOYSA-N
    • 3-OCTYLHEPTAMETHYLTRISILOXANE?
    • DB-315540
    • NS00052176
    • 1,1,1,3,5,5,5-Heptamethyl-3-Ctyltrisiloxane
    • 1,1,1,3,5,5,5-Heptamethyl-3-octyl-trisiloxane
    • Q27287131
    • trimethyl-(methyl-octyl-trimethylsilyloxy-silyl)oxy-silane
    • 17955-88-3

  • Applications

    Caprylyl trisiloxane, CAS 17955-88-3, is a volatile siloxane oil widely used as a light emollient and solvent carrier in cosmetics and personal care formulations, delivering a silky, fast-drying feel and acting as a carrier for active ingredients and fragrance oils; in perfumery, it is commonly employed as a solvent and fragrance carrier for aroma blends; in coatings and inks, it can serve as a processing aid or slip agent to improve leveling and surface slip; and in industrial manufacturing, it may be used as a solvent and lubricating additive in polymer or elastomer processing.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 713.12
    methanol 550.88
    isopropanol 690.22
    water 0.86
    ethyl acetate 819.1
    n-propanol 827.11
    acetone 896.81
    n-butanol 811.46
    acetonitrile 309.98
    DMF 1114.2
    toluene 931.85
    isobutanol 696.04
    1,4-dioxane 1273.36
    methyl acetate 573.02
    THF 3625.92
    2-butanone 939.3
    n-pentanol 662.22
    sec-butanol 845.91
    n-hexane 662.43
    ethylene glycol 84.93
    NMP 1798.55
    cyclohexane 1442.99
    DMSO 1021.42
    n-butyl acetate 947.73
    n-octanol 740.01
    chloroform 1911.73
    n-propyl acetate 734.46
    acetic acid 410.02
    dichloromethane 1600.13
    cyclohexanone 2156.9
    propylene glycol 253.25
    isopropyl acetate 783.09
    DMAc 1063.11
    2-ethoxyethanol 533.55
    isopentanol 687.93
    n-heptane 644.73
    ethyl formate 434.89
    1,2-dichloroethane 1033.06
    n-hexanol 941.87
    2-methoxyethanol 766.95
    isobutyl acetate 629.96
    tetrachloromethane 458.33
    n-pentyl acetate 1085.33
    transcutol 1305.44
    n-heptanol 657.55
    ethylbenzene 495.32
    MIBK 786.73
    2-propoxyethanol 1014.41
    tert-butanol 805.88
    MTBE 927.34
    2-butoxyethanol 737.71
    propionic acid 506.05
    o-xylene 512.45
    formic acid 100.64
    diethyl ether 1144.0
    m-xylene 630.76
    p-xylene 602.97
    chlorobenzene 818.31
    dimethyl carbonate 289.99
    n-octane 279.65
    formamide 155.91
    cyclopentanone 2290.1
    2-pentanone 1060.12
    anisole 628.71
    cyclopentyl methyl ether 2129.13
    gamma-butyrolactone 1852.63
    1-methoxy-2-propanol 883.87
    pyridine 1188.1
    3-pentanone 829.21
    furfural 1089.02
    n-dodecane 153.93
    diethylene glycol 412.37
    diisopropyl ether 577.48
    tert-amyl alcohol 799.31
    acetylacetone 886.04
    n-hexadecane 177.38
    acetophenone 615.63
    methyl propionate 702.98
    isopentyl acetate 844.03
    trichloroethylene 1491.01
    n-nonanol 647.66
    cyclohexanol 1362.97
    benzyl alcohol 466.92
    2-ethylhexanol 686.29
    isooctanol 543.75
    dipropyl ether 1073.86
    1,2-dichlorobenzene 664.91
    ethyl lactate 314.24
    propylene carbonate 1052.32
    n-methylformamide 464.62
    2-pentanol 749.43
    n-pentane 604.63
    1-propoxy-2-propanol 937.68
    1-methoxy-2-propyl acetate 808.76
    2-(2-methoxypropoxy) propanol 471.78
    mesitylene 458.48
    ε-caprolactone 1708.47
    p-cymene 385.08
    epichlorohydrin 1414.75
    1,1,1-trichloroethane 1022.96
    2-aminoethanol 277.9
    morpholine-4-carbaldehyde 1211.97
    sulfolane 2088.4
    2,2,4-trimethylpentane 239.5
    2-methyltetrahydrofuran 2304.81
    n-hexyl acetate 1342.8
    isooctane 202.06
    2-(2-butoxyethoxy)ethanol 731.82
    sec-butyl acetate 587.68
    tert-butyl acetate 891.36
    decalin 387.29
    glycerin 263.24
    diglyme 1145.16
    acrylic acid 319.95
    isopropyl myristate 534.11
    n-butyric acid 907.79
    acetyl acetate 483.44
    di(2-ethylhexyl) phthalate 384.47
    ethyl propionate 610.16
    nitromethane 535.5
    1,2-diethoxyethane 829.24
    benzonitrile 564.66
    trioctyl phosphate 357.48
    1-bromopropane 1160.01
    gamma-valerolactone 2022.71
    n-decanol 461.99
    triethyl phosphate 359.21
    4-methyl-2-pentanol 496.13
    propionitrile 481.42
    vinylene carbonate 754.31
    1,1,2-trichlorotrifluoroethane 838.83
    DMS 536.01
    cumene 344.69
    2-octanol 621.28
    2-hexanone 835.52
    octyl acetate 667.07
    limonene 723.15
    1,2-dimethoxyethane 947.69
    ethyl orthosilicate 384.74
    tributyl phosphate 391.12
    diacetone alcohol 735.04
    N,N-dimethylaniline 523.22
    acrylonitrile 394.03
    aniline 702.28
    1,3-propanediol 405.57
    bromobenzene 938.02
    dibromomethane 1441.35
    1,1,2,2-tetrachloroethane 1466.27
    2-methyl-cyclohexyl acetate 757.02
    tetrabutyl urea 559.14
    diisobutyl methanol 446.57
    2-phenylethanol 592.31
    styrene 570.24
    dioctyl adipate 608.14
    dimethyl sulfate 432.42
    ethyl butyrate 723.52
    methyl lactate 357.38
    butyl lactate 668.75
    diethyl carbonate 410.53
    propanediol butyl ether 660.73
    triethyl orthoformate 607.1
    p-tert-butyltoluene 410.41
    methyl 4-tert-butylbenzoate 683.31
    morpholine 1612.17
    tert-butylamine 682.69
    n-dodecanol 348.03
    dimethoxymethane 1005.09
    ethylene carbonate 762.18
    cyrene 553.64
    2-ethoxyethyl acetate 868.9
    2-ethylhexyl acetate 814.32
    1,2,4-trichlorobenzene 786.06
    4-methylpyridine 1213.23
    dibutyl ether 931.01
    2,6-dimethyl-4-heptanol 446.57
    DEF 978.05
    dimethyl isosorbide 982.82
    tetrachloroethylene 898.28
    eugenol 526.63
    triacetin 786.32
    span 80 728.66
    1,4-butanediol 200.87
    1,1-dichloroethane 1041.49
    2-methyl-1-pentanol 541.48
    methyl formate 328.13
    2-methyl-1-butanol 705.69
    n-decane 312.74
    butyronitrile 629.83
    3,7-dimethyl-1-octanol 577.33
    1-chlorooctane 723.78
    1-chlorotetradecane 275.18
    n-nonane 337.27
    undecane 207.02
    tert-butylcyclohexane 336.44
    cyclooctane 597.7
    cyclopentanol 1355.08
    tetrahydropyran 2537.53
    tert-amyl methyl ether 873.16
    2,5,8-trioxanonane 750.88
    1-hexene 986.88
    2-isopropoxyethanol 469.7
    2,2,2-trifluoroethanol 151.23
    methyl butyrate 744.92

    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