Disodium carboxyethyl siliconate

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  • Identifiers

    CAS number
    18191-40-7

    Molecular formula
    C3H6Na2O5Si

    SMILES
    C(C[Si](O)(O)[O-])C(=O)[O-].[Na+].[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 67.8%
    Sweet 38.84%
    Clean 20.37%
    Alcoholic 16.94%
    Milky 16.01%
    Balsamic 15.85%
    Savory 15.81%
    Sour 15.6%
    Bitter 15.17%
    Creamy 14.96%

     

    Flavor
    Odorless 77.12%
    Mild 31.35%
    Sour 27.26%
    Very mild 26.77%
    Sweet-like 24.88%
    Bland 23.89%
    Yeast 21.84%
    Acidic 21.26%
    Very slight 20.53%
    Acetoin 20.07%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    5.77 (weak acid)

    Molecular weight
    196.14 g/mol

    Flash point

    • 122.67 ˚C est.

  • Synonyms

    • 18191-40-7
    • Disodium carboxyethyl siliconate
    • carboxyethylsilanetriol sodium salt
    • Sodium carboxyethylsilanetriol
    • UNII-4U4C79679G
    • 4U4C79679G
    • Disodium carboxyethyl siliconate [INCI]
    • Propanoic acid, 3-(trihydroxysilyl)-, disodium salt
    • Propionic acid, 3-(trihydroxysilyl)-, disodium salt
    • Propanoic acid, 3-(trihydroxysilyl)-, sodium salt (1:2)
    • CARBOXYETHYL SILICONATE
    • DTXSID50171219
    • RefChem:135018
    • DTXCID0093710
    • disodium 3-[dihydroxy(oxido)silyl]propanoate
    • disodium;3-[dihydroxy(oxido)silyl]propanoate
    • Carboxyethylsilanetriol Sodium Salt - 25% in water
    • MFCD22375690
    • S03678
    • CARBOXYETHYLSILANETRIOL NA SALT 25per cent IN WATER
    • Carboxyethylsilanetriol na salt 25% in water
    • C3H6Na2O5Si
    • SCHEMBL29451298
    • JGOICJFFICGNEJ-UHFFFAOYSA-M
    • Carboxyethylsilanetriol, disodium salt
    • Sodium 3-(dihydroxyoxidosilyl)propanoate
    • FC139273
    • DB-230271
    • Carboxyethylsilanetriol disodium salt, 25% in water
    • Q27260504
    • Carboxyethylsilanetriol di-sodium salt, 23%-27% in water
    • 18191-40-7

  • Applications

    Disodium carboxyethyl siliconate (CAS 18191-40-7) is a silicon-based surfactant and coupling agent commonly used as an adhesion promoter and surface modifier in coatings and polymer systems to improve bonding to inorganic substrates and plastics. It serves as a dispersant and processing aid in polymer and composite formulations, helping to improve dispersion, stability, and surface properties. In construction, it is used as a waterproofing and surface-modifying additive for cementitious materials, enhancing water resistance and durability under weathering. In cleaning formulations and agricultural contexts, it can act as a surfactant to improve wetting and spreading, and its carboxylate groups may participate in metal-chelation processes to boost formulation performance. It may be viewed as a processing intermediate or additive in silicone- and polymer-based materials to improve interfacial bonding and surface characteristics, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 373.53
    methanol 727.63
    isopropanol 219.52
    water 869.26
    ethyl acetate 30.43
    n-propanol 204.89
    acetone 159.63
    n-butanol 143.59
    acetonitrile 71.69
    DMF 777.62
    toluene 11.8
    isobutanol 92.76
    1,4-dioxane 187.16
    methyl acetate 57.07
    THF 259.58
    2-butanone 62.78
    n-pentanol 88.92
    sec-butanol 123.06
    n-hexane 8.71
    ethylene glycol 410.99
    NMP 224.17
    cyclohexane 12.86
    DMSO 725.15
    n-butyl acetate 19.66
    n-octanol 41.69
    chloroform 14.54
    n-propyl acetate 26.75
    acetic acid 127.79
    dichloromethane 31.59
    cyclohexanone 49.28
    propylene glycol 235.39
    isopropyl acetate 19.59
    DMAc 358.72
    2-ethoxyethanol 372.34
    isopentanol 85.22
    n-heptane 8.35
    ethyl formate 115.08
    1,2-dichloroethane 39.27
    n-hexanol 54.38
    2-methoxyethanol 716.48
    isobutyl acetate 9.22
    tetrachloromethane 8.81
    n-pentyl acetate 18.84
    transcutol 216.67
    n-heptanol 41.89
    ethylbenzene 10.11
    MIBK 25.53
    2-propoxyethanol 183.29
    tert-butanol 208.76
    MTBE 54.57
    2-butoxyethanol 126.74
    propionic acid 62.25
    o-xylene 15.71
    formic acid 439.5
    diethyl ether 71.83
    m-xylene 9.98
    p-xylene 9.97
    chlorobenzene 6.44
    dimethyl carbonate 55.15
    n-octane 4.49
    formamide 630.51
    cyclopentanone 86.96
    2-pentanone 47.63
    anisole 37.78
    cyclopentyl methyl ether 62.34
    gamma-butyrolactone 95.1
    1-methoxy-2-propanol 306.26
    pyridine 49.62
    3-pentanone 30.67
    furfural 139.25
    n-dodecane 3.47
    diethylene glycol 308.11
    diisopropyl ether 15.29
    tert-amyl alcohol 116.41
    acetylacetone 51.92
    n-hexadecane 3.58
    acetophenone 31.1
    methyl propionate 42.69
    isopentyl acetate 13.76
    trichloroethylene 22.97
    n-nonanol 37.1
    cyclohexanol 60.67
    benzyl alcohol 50.44
    2-ethylhexanol 21.77
    isooctanol 25.4
    dipropyl ether 31.6
    1,2-dichlorobenzene 7.58
    ethyl lactate 38.53
    propylene carbonate 40.9
    n-methylformamide 451.62
    2-pentanol 65.5
    n-pentane 12.95
    1-propoxy-2-propanol 91.58
    1-methoxy-2-propyl acetate 29.33
    2-(2-methoxypropoxy) propanol 87.54
    mesitylene 9.02
    ε-caprolactone 47.1
    p-cymene 8.22
    epichlorohydrin 121.25
    1,1,1-trichloroethane 10.43
    2-aminoethanol 466.07
    morpholine-4-carbaldehyde 307.81
    sulfolane 129.09
    2,2,4-trimethylpentane 3.19
    2-methyltetrahydrofuran 94.38
    n-hexyl acetate 25.33
    isooctane 2.56
    2-(2-butoxyethoxy)ethanol 129.07
    sec-butyl acetate 12.21
    tert-butyl acetate 23.5
    decalin 4.44
    glycerin 376.57
    diglyme 262.61
    acrylic acid 65.45
    isopropyl myristate 12.25
    n-butyric acid 56.28
    acetyl acetate 17.53
    di(2-ethylhexyl) phthalate 15.41
    ethyl propionate 23.55
    nitromethane 206.36
    1,2-diethoxyethane 50.63
    benzonitrile 21.11
    trioctyl phosphate 15.3
    1-bromopropane 18.69
    gamma-valerolactone 160.95
    n-decanol 28.15
    triethyl phosphate 16.14
    4-methyl-2-pentanol 30.01
    propionitrile 43.49
    vinylene carbonate 40.69
    1,1,2-trichlorotrifluoroethane 104.93
    DMS 16.37
    cumene 8.68
    2-octanol 23.95
    2-hexanone 31.91
    octyl acetate 18.5
    limonene 10.16
    1,2-dimethoxyethane 482.08
    ethyl orthosilicate 16.43
    tributyl phosphate 13.92
    diacetone alcohol 68.29
    N,N-dimethylaniline 46.29
    acrylonitrile 61.29
    aniline 33.31
    1,3-propanediol 377.16
    bromobenzene 4.65
    dibromomethane 20.35
    1,1,2,2-tetrachloroethane 29.54
    2-methyl-cyclohexyl acetate 15.22
    tetrabutyl urea 31.57
    diisobutyl methanol 15.29
    2-phenylethanol 34.57
    styrene 10.27
    dioctyl adipate 18.27
    dimethyl sulfate 84.75
    ethyl butyrate 19.03
    methyl lactate 76.42
    butyl lactate 27.21
    diethyl carbonate 15.75
    propanediol butyl ether 103.29
    triethyl orthoformate 20.56
    p-tert-butyltoluene 8.55
    methyl 4-tert-butylbenzoate 40.89
    morpholine 239.72
    tert-butylamine 103.17
    n-dodecanol 21.75
    dimethoxymethane 355.91
    ethylene carbonate 38.3
    cyrene 72.72
    2-ethoxyethyl acetate 26.33
    2-ethylhexyl acetate 10.12
    1,2,4-trichlorobenzene 8.24
    4-methylpyridine 45.54
    dibutyl ether 22.79
    2,6-dimethyl-4-heptanol 15.29
    DEF 109.97
    dimethyl isosorbide 95.32
    tetrachloroethylene 26.59
    eugenol 60.77
    triacetin 22.52
    span 80 50.05
    1,4-butanediol 198.99
    1,1-dichloroethane 15.74
    2-methyl-1-pentanol 49.77
    methyl formate 311.18
    2-methyl-1-butanol 74.66
    n-decane 5.16
    butyronitrile 45.5
    3,7-dimethyl-1-octanol 23.95
    1-chlorooctane 10.65
    1-chlorotetradecane 5.53
    n-nonane 5.19
    undecane 4.11
    tert-butylcyclohexane 3.3
    cyclooctane 6.28
    cyclopentanol 103.1
    tetrahydropyran 78.78
    tert-amyl methyl ether 42.29
    2,5,8-trioxanonane 197.76
    1-hexene 15.65
    2-isopropoxyethanol 145.88
    2,2,2-trifluoroethanol 105.81
    methyl butyrate 40.19

    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