Ethyl trisiloxane

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  • Identifiers

    CAS number
    17861-60-8

    Molecular formula
    C9H26O2Si3

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

    Safety labels

    Flammable
    Flammable

  • Odor profile

    Fragrance
    Mint 34.4%
    Odorless 30.66%
    Green 30.17%
    Alcoholic 26.66%
    Fresh 25.55%
    Cooling 25.06%
    Camphoreous 24.79%
    Woody 24.61%
    Ethereal 23.68%
    Fruity 22.8%

     

    Flavor
    Green 37.96%
    Pungent 27.36%
    Earthy 25.14%
    Mild 22.55%
    Citrus 20.87%
    Rose acetate 20.87%
    Black currant 20.74%
    Catty 20.64%
    Blackberry 20.23%
    Tropical 20.06%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    7.76 (neutral)

    Molecular weight
    250.56 g/mol

    Flash point

    • 51.23 ˚C est.

  • Synonyms

    • ethyl trisiloxane
    • 17861-60-8
    • 3-ethylheptamethyltrisiloxane
    • Trisiloxane, 3-ethyl-1,1,1,3,5,5,5-heptamethyl-
    • 3-ETHYL-1,1,1,3,5,5,5-HEPTAMETHYLTRISILOXANE
    • UNII-ZH1WJO5481
    • ZH1WJO5481
    • SILSOFT ETS
    • BOTANISIL VS-3
    • DTXSID80170518
    • RefChem:139067
    • DTXCID0093009
    • ETHYL TRISILOXANE [INCI]
    • 469-070-1
    • ethyl-methyl-bis(trimethylsilyloxy)silane
    • C9H26O2Si3
    • SCHEMBL239255
    • SCHEMBL3367978
    • SCHEMBL3367980
    • HLPWCQDWRYCGLK-UHFFFAOYSA-N
    • DB-315420
    • NS00121971
    • Q27295512
    • 17861-60-8

  • Applications

    Ethyl trisiloxane (CAS 17861-60-8) is a low-viscosity organosilicon fluid used as a solvent and processing aid in coatings, inks, and adhesives; it can act as a reactive diluent or building block for silicone-resin and elastomer formulations; it may function as a plasticizer or coupling agent in polymer and plastics systems; it is used in cleaning formulations and electronics-grade cleaners; it may serve as a processing aid or surface-active additive in electronics manufacturing; and it may be used as a solvent or carrier in cosmetic/personal care formulations for fragrances or actives.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 321.28
    methanol 381.8
    isopropanol 303.09
    water 5.63
    ethyl acetate 295.73
    n-propanol 351.26
    acetone 382.72
    n-butanol 325.43
    acetonitrile 173.56
    DMF 586.73
    toluene 328.62
    isobutanol 270.01
    1,4-dioxane 533.53
    methyl acetate 258.13
    THF 1309.39
    2-butanone 335.06
    n-pentanol 260.51
    sec-butanol 309.57
    n-hexane 231.28
    ethylene glycol 109.83
    NMP 747.41
    cyclohexane 394.18
    DMSO 467.38
    n-butyl acetate 325.62
    n-octanol 309.0
    chloroform 735.56
    n-propyl acetate 237.64
    acetic acid 190.55
    dichloromethane 570.16
    cyclohexanone 733.91
    propylene glycol 205.38
    isopropyl acetate 251.2
    DMAc 452.72
    2-ethoxyethanol 257.23
    isopentanol 250.41
    n-heptane 240.26
    ethyl formate 214.74
    1,2-dichloroethane 360.41
    n-hexanol 444.04
    2-methoxyethanol 426.99
    isobutyl acetate 202.91
    tetrachloromethane 209.72
    n-pentyl acetate 320.57
    transcutol 374.12
    n-heptanol 299.46
    ethylbenzene 192.62
    MIBK 272.56
    2-propoxyethanol 534.22
    tert-butanol 332.05
    MTBE 270.63
    2-butoxyethanol 311.05
    propionic acid 251.6
    o-xylene 222.46
    formic acid 79.12
    diethyl ether 381.78
    m-xylene 266.67
    p-xylene 220.08
    chlorobenzene 291.81
    dimethyl carbonate 166.24
    n-octane 124.39
    formamide 110.47
    cyclopentanone 869.88
    2-pentanone 377.18
    anisole 254.06
    cyclopentyl methyl ether 708.4
    gamma-butyrolactone 750.48
    1-methoxy-2-propanol 460.02
    pyridine 405.74
    3-pentanone 302.2
    furfural 505.31
    n-dodecane 80.47
    diethylene glycol 310.96
    diisopropyl ether 187.76
    tert-amyl alcohol 278.99
    acetylacetone 353.64
    n-hexadecane 88.87
    acetophenone 250.74
    methyl propionate 296.24
    isopentyl acetate 285.13
    trichloroethylene 487.79
    n-nonanol 271.44
    cyclohexanol 491.99
    benzyl alcohol 208.18
    2-ethylhexanol 293.51
    isooctanol 234.13
    dipropyl ether 384.57
    1,2-dichlorobenzene 269.71
    ethyl lactate 164.71
    propylene carbonate 446.39
    n-methylformamide 281.88
    2-pentanol 282.99
    n-pentane 221.82
    1-propoxy-2-propanol 428.26
    1-methoxy-2-propyl acetate 333.09
    2-(2-methoxypropoxy) propanol 213.62
    mesitylene 200.56
    ε-caprolactone 569.49
    p-cymene 176.22
    epichlorohydrin 523.54
    1,1,1-trichloroethane 356.38
    2-aminoethanol 206.78
    morpholine-4-carbaldehyde 549.86
    sulfolane 885.58
    2,2,4-trimethylpentane 87.23
    2-methyltetrahydrofuran 730.43
    n-hexyl acetate 407.9
    isooctane 76.01
    2-(2-butoxyethoxy)ethanol 295.88
    sec-butyl acetate 185.06
    tert-butyl acetate 285.52
    decalin 143.92
    glycerin 233.37
    diglyme 446.97
    acrylic acid 199.23
    isopropyl myristate 205.39
    n-butyric acid 335.05
    acetyl acetate 206.37
    di(2-ethylhexyl) phthalate 165.11
    ethyl propionate 235.58
    nitromethane 272.71
    1,2-diethoxyethane 266.71
    benzonitrile 252.44
    trioctyl phosphate 159.98
    1-bromopropane 377.3
    gamma-valerolactone 735.44
    n-decanol 206.7
    triethyl phosphate 153.48
    4-methyl-2-pentanol 185.88
    propionitrile 228.09
    vinylene carbonate 371.11
    1,1,2-trichlorotrifluoroethane 378.53
    DMS 231.74
    cumene 150.17
    2-octanol 263.76
    2-hexanone 270.51
    octyl acetate 245.17
    limonene 276.77
    1,2-dimethoxyethane 408.95
    ethyl orthosilicate 156.74
    tributyl phosphate 162.12
    diacetone alcohol 296.32
    N,N-dimethylaniline 226.73
    acrylonitrile 224.19
    aniline 282.48
    1,3-propanediol 243.98
    bromobenzene 310.73
    dibromomethane 514.99
    1,1,2,2-tetrachloroethane 501.04
    2-methyl-cyclohexyl acetate 281.63
    tetrabutyl urea 230.79
    diisobutyl methanol 194.51
    2-phenylethanol 287.23
    styrene 205.08
    dioctyl adipate 224.85
    dimethyl sulfate 248.78
    ethyl butyrate 266.15
    methyl lactate 226.67
    butyl lactate 269.01
    diethyl carbonate 170.02
    propanediol butyl ether 302.44
    triethyl orthoformate 218.27
    p-tert-butyltoluene 186.71
    methyl 4-tert-butylbenzoate 289.99
    morpholine 589.91
    tert-butylamine 286.62
    n-dodecanol 165.08
    dimethoxymethane 495.23
    ethylene carbonate 341.02
    cyrene 284.71
    2-ethoxyethyl acetate 275.32
    2-ethylhexyl acetate 275.29
    1,2,4-trichlorobenzene 319.19
    4-methylpyridine 425.18
    dibutyl ether 284.6
    2,6-dimethyl-4-heptanol 194.51
    DEF 366.51
    dimethyl isosorbide 445.92
    tetrachloroethylene 333.29
    eugenol 262.72
    triacetin 278.48
    span 80 299.36
    1,4-butanediol 130.86
    1,1-dichloroethane 359.74
    2-methyl-1-pentanol 200.73
    methyl formate 224.18
    2-methyl-1-butanol 251.04
    n-decane 136.95
    butyronitrile 256.46
    3,7-dimethyl-1-octanol 247.53
    1-chlorooctane 266.48
    1-chlorotetradecane 119.77
    n-nonane 148.75
    undecane 100.07
    tert-butylcyclohexane 129.37
    cyclooctane 200.48
    cyclopentanol 543.97
    tetrahydropyran 737.58
    tert-amyl methyl ether 265.95
    2,5,8-trioxanonane 334.14
    1-hexene 313.96
    2-isopropoxyethanol 203.25
    2,2,2-trifluoroethanol 91.97
    methyl butyrate 278.87

    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