Bis-diphenylethyl disiloxane

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  • Identifiers

    CAS number
    820207-10-1

    Molecular formula
    C32H38OSi2

    SMILES
    C[Si](C)(CC(C1=CC=CC=C1)C2=CC=CC=C2)O[Si](C)(C)CC(C3=CC=CC=C3)C4=CC=CC=C4

    Safety labels

  • Odor profile

    Fragrance
    Floral 80.44%
    Green 64.87%
    Rose 56.68%
    Fresh 41.16%
    Fruity 39.38%
    Lily 34.52%
    Balsamic 32.8%
    Geranium 32.43%
    Hyacinth 30.73%
    Metallic 30.51%

     

    Flavor
    Green 33.31%
    Bitter 25.35%
    Mild 22.25%
    Waxy 20.62%
    Floral 19.35%
    Heather 18.14%
    Delicate 17.66%
    Genet 17.6%
    Broom 17.59%
    Rosy 17.5%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    8.63 (weak base)

    Molecular weight
    494.8 g/mol

    Flash point

    • 208.93 ˚C est.

  • Synonyms

    • Bis-diphenylethyl disiloxane
    • 820207-10-1
    • UNII-84246P91I5
    • Disiloxane, 1,3-bis(2,2-diphenylethyl)-1,1,3,3-tetramethyl-
    • 84246P91I5
    • DTXSID40231518
    • Q27269472
    • 1,3-Bis(2,2-diphenylethyl)-1,1,3,3-tetramethyldisiloxane
    • 820207-10-1

  • Applications

    Bis-diphenylethyl disiloxane, CAS 820207-10-1, is an organosilicon compound featuring two diphenylethyl substituents on a disiloxane core, commonly used as a processing additive and synthetic intermediate in silicone polymer and coating formulations; in polymers/plastics, it is often employed as a flow modifier and slip agent to tune rheology and surface properties; in coatings/inks, it serves as a flow control and surface-smoothing additive to improve sprayability and leveling; in adhesives, it can function as a bonding modifier or flexible crosslinking component to adjust adhesion and elastomeric behavior; in electronics, it may be used as a dielectric/insulating additive in silicone encapsulants or potting materials for electronic devices.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 25.28
    methanol 15.6
    isopropanol 15.67
    water 0.06
    ethyl acetate 133.2
    n-propanol 34.98
    acetone 88.69
    n-butanol 36.59
    acetonitrile 19.86
    DMF 214.35
    toluene 151.09
    isobutanol 26.0
    1,4-dioxane 176.07
    methyl acetate 90.01
    THF 851.4
    2-butanone 138.93
    n-pentanol 30.05
    sec-butanol 27.04
    n-hexane 23.26
    ethylene glycol 2.31
    NMP 484.01
    cyclohexane 42.81
    DMSO 111.22
    n-butyl acetate 139.45
    n-octanol 28.74
    chloroform 524.82
    n-propyl acetate 95.59
    acetic acid 36.83
    dichloromethane 485.56
    cyclohexanone 320.19
    propylene glycol 6.95
    isopropyl acetate 113.57
    DMAc 327.31
    2-ethoxyethanol 44.21
    isopentanol 32.65
    n-heptane 29.29
    ethyl formate 60.06
    1,2-dichloroethane 262.23
    n-hexanol 40.83
    2-methoxyethanol 57.56
    isobutyl acetate 77.78
    tetrachloromethane 61.35
    n-pentyl acetate 125.9
    transcutol 130.64
    n-heptanol 34.7
    ethylbenzene 62.44
    MIBK 101.88
    2-propoxyethanol 84.46
    tert-butanol 19.6
    MTBE 80.64
    2-butoxyethanol 72.73
    propionic acid 43.45
    o-xylene 77.79
    formic acid 9.18
    diethyl ether 115.09
    m-xylene 90.95
    p-xylene 61.69
    chlorobenzene 194.43
    dimethyl carbonate 87.99
    n-octane 10.23
    formamide 19.0
    cyclopentanone 487.25
    2-pentanone 144.1
    anisole 113.4
    cyclopentyl methyl ether 351.07
    gamma-butyrolactone 445.64
    1-methoxy-2-propanol 61.27
    pyridine 223.39
    3-pentanone 149.17
    furfural 245.19
    n-dodecane 5.7
    diethylene glycol 24.17
    diisopropyl ether 46.95
    tert-amyl alcohol 31.55
    acetylacetone 159.6
    n-hexadecane 6.76
    acetophenone 109.53
    methyl propionate 145.98
    isopentyl acetate 128.68
    trichloroethylene 535.82
    n-nonanol 32.97
    cyclohexanol 62.55
    benzyl alcohol 54.52
    2-ethylhexanol 44.54
    isooctanol 33.04
    dipropyl ether 141.45
    1,2-dichlorobenzene 173.21
    ethyl lactate 38.09
    propylene carbonate 221.14
    n-methylformamide 59.77
    2-pentanol 28.93
    n-pentane 20.71
    1-propoxy-2-propanol 82.4
    1-methoxy-2-propyl acetate 168.55
    2-(2-methoxypropoxy) propanol 63.53
    mesitylene 50.88
    ε-caprolactone 286.45
    p-cymene 46.18
    epichlorohydrin 471.8
    1,1,1-trichloroethane 223.71
    2-aminoethanol 9.99
    morpholine-4-carbaldehyde 263.27
    sulfolane 458.78
    2,2,4-trimethylpentane 13.84
    2-methyltetrahydrofuran 392.31
    n-hexyl acetate 113.7
    isooctane 8.76
    2-(2-butoxyethoxy)ethanol 74.36
    sec-butyl acetate 85.43
    tert-butyl acetate 132.55
    decalin 21.26
    glycerin 11.42
    diglyme 176.6
    acrylic acid 34.84
    isopropyl myristate 49.45
    n-butyric acid 84.33
    acetyl acetate 83.36
    di(2-ethylhexyl) phthalate 45.52
    ethyl propionate 103.47
    nitromethane 82.52
    1,2-diethoxyethane 111.49
    benzonitrile 72.68
    trioctyl phosphate 32.94
    1-bromopropane 182.07
    gamma-valerolactone 459.33
    n-decanol 23.02
    triethyl phosphate 64.43
    4-methyl-2-pentanol 22.89
    propionitrile 37.89
    vinylene carbonate 179.61
    1,1,2-trichlorotrifluoroethane 196.62
    DMS 100.15
    cumene 38.16
    2-octanol 24.89
    2-hexanone 98.48
    octyl acetate 60.79
    limonene 78.67
    1,2-dimethoxyethane 119.22
    ethyl orthosilicate 68.84
    tributyl phosphate 40.68
    diacetone alcohol 81.24
    N,N-dimethylaniline 85.36
    acrylonitrile 41.66
    aniline 92.86
    1,3-propanediol 17.9
    bromobenzene 236.56
    dibromomethane 316.6
    1,1,2,2-tetrachloroethane 419.94
    2-methyl-cyclohexyl acetate 113.3
    tetrabutyl urea 64.34
    diisobutyl methanol 30.91
    2-phenylethanol 63.09
    styrene 76.72
    dioctyl adipate 71.58
    dimethyl sulfate 146.82
    ethyl butyrate 133.03
    methyl lactate 52.77
    butyl lactate 73.93
    diethyl carbonate 75.66
    propanediol butyl ether 41.85
    triethyl orthoformate 116.27
    p-tert-butyltoluene 45.53
    methyl 4-tert-butylbenzoate 109.94
    morpholine 220.33
    tert-butylamine 16.51
    n-dodecanol 16.88
    dimethoxymethane 189.9
    ethylene carbonate 152.89
    cyrene 91.09
    2-ethoxyethyl acetate 147.89
    2-ethylhexyl acetate 126.53
    1,2,4-trichlorobenzene 195.72
    4-methylpyridine 222.67
    dibutyl ether 75.13
    2,6-dimethyl-4-heptanol 30.91
    DEF 183.51
    dimethyl isosorbide 200.17
    tetrachloroethylene 226.42
    eugenol 78.3
    triacetin 109.2
    span 80 63.34
    1,4-butanediol 7.3
    1,1-dichloroethane 206.36
    2-methyl-1-pentanol 32.99
    methyl formate 53.95
    2-methyl-1-butanol 37.07
    n-decane 12.01
    butyronitrile 47.98
    3,7-dimethyl-1-octanol 32.25
    1-chlorooctane 45.02
    1-chlorotetradecane 16.64
    n-nonane 11.23
    undecane 7.68
    tert-butylcyclohexane 17.61
    cyclooctane 21.38
    cyclopentanol 76.29
    tetrahydropyran 288.53
    tert-amyl methyl ether 94.91
    2,5,8-trioxanonane 102.88
    1-hexene 54.12
    2-isopropoxyethanol 39.21
    2,2,2-trifluoroethanol 20.2
    methyl butyrate 118.98

    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