Potassium polysilicate

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  • Identifiers

    CAS number
    1312-76-1

    Molecular formula
    K4O4Si

    SMILES
    [O-][Si]([O-])([O-])[O-].[K+].[K+].[K+].[K+]

    Safety labels

    Corrosive
    Corrosive

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 71.15%
    Sweet 31.89%
    Balsamic 17.17%
    Clean 16.04%
    Fishy 15.3%
    Alcoholic 14.71%
    Cooling 13.4%
    Bitter 13.28%
    Musk 13.07%
    Dry 12.4%

     

    Flavor
    Odorless 60.18%
    Mild 20.5%
    Sweet-like 20.08%
    Rotten 18.67%
    Bland 18.59%
    Very slight 18.33%
    Mousy 18.11%
    Soy 17.63%
    Formyl 17.45%
    Bouillon 17.34%

     

    Odor impact est.
    High

  • Properties

    pKa est.
    -7.05 (strong acid)

    Molecular weight
    248.48 g/mol

    Flash point

    • 35.41 ˚C est.

    Solubility expt.

    • SOL IN COLD & HOT WATER; INSOL ALC /META & TETRASILICATE/
    • USUALLY VERY SLOWLY SOL IN COLD WATER
    • DEPENDING ON COMPOSITION, ALMOST INSOL IN COLD WATER
    • SOL IN WATER WHEN HEATED WITH IT UNDER PRESSURE
    • INSOL IN ALC

  • Synonyms

    • Potassium water glass
    • Kasil
    • Kasil 6
    • Pyramid 120
    • RefChem:1096558
    • 1312-76-1
    • potassium orthosilicate
    • Potassium Silicate, Anhydrous
    • tetrapotassium;silicate
    • Pyramid K-84
    • Potassium silicate (K4SiO4)
    • potassium hydroxy(oxo)silanolate
    • 55R0S6LC84
    • K-84
    • UNII-55R0S6LC84
    • Silicic acid (H4SiO4), tetrapotassium salt
    • 14293-88-0
    • Caswell No. 701B
    • Aqueous potassium silicate
    • UNII-J86L1GUL6K
    • SCHEMBL25989
    • HSDB 5798
    • EINECS 215-199-1
    • EPA Pesticide Chemical Code 072606
    • EC 215-199-1
    • Q27261332
    • 1312-76-1

  • Applications

    Potassium polysilicate (CAS 1312-76-1) is used as a water-soluble binder in industrial coatings and protective paints, and as a binder for cementitious and refractory formulations; it also serves as a protective coating and metal surface treatment to inhibit corrosion and support passivation; it provides a source of soluble silica in agriculture, where it is used in foliar sprays or soil applications to strengthen plant tissues and improve stress tolerance; it functions as a binder in wood coatings and composites, including adhesives and sealants, and appears in some cleaning formulations as an alkaline builder that enhances cleaning performance and formulation stability.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 434.46
    methanol 737.54
    isopropanol 361.55
    water 323.14
    ethyl acetate 95.84
    n-propanol 269.92
    acetone 282.8
    n-butanol 214.68
    acetonitrile 163.0
    DMF 939.03
    toluene 44.41
    isobutanol 153.54
    1,4-dioxane 218.07
    methyl acetate 114.65
    THF 362.54
    2-butanone 139.24
    n-pentanol 121.29
    sec-butanol 219.94
    n-hexane 36.97
    ethylene glycol 407.67
    NMP 330.1
    cyclohexane 45.89
    DMSO 999.78
    n-butyl acetate 45.48
    n-octanol 89.31
    chloroform 132.66
    n-propyl acetate 54.39
    acetic acid 198.88
    dichloromethane 154.72
    cyclohexanone 99.36
    propylene glycol 256.58
    isopropyl acetate 72.01
    DMAc 453.22
    2-ethoxyethanol 272.5
    isopentanol 134.9
    n-heptane 35.16
    ethyl formate 117.42
    1,2-dichloroethane 138.03
    n-hexanol 112.73
    2-methoxyethanol 654.4
    isobutyl acetate 27.57
    tetrachloromethane 51.09
    n-pentyl acetate 53.89
    transcutol 198.03
    n-heptanol 88.51
    ethylbenzene 26.22
    MIBK 79.07
    2-propoxyethanol 230.0
    tert-butanol 348.27
    MTBE 161.09
    2-butoxyethanol 149.2
    propionic acid 135.57
    o-xylene 46.6
    formic acid 342.15
    diethyl ether 235.02
    m-xylene 39.9
    p-xylene 28.06
    chlorobenzene 35.39
    dimethyl carbonate 111.04
    n-octane 19.77
    formamide 484.24
    cyclopentanone 159.82
    2-pentanone 130.26
    anisole 63.96
    cyclopentyl methyl ether 148.13
    gamma-butyrolactone 170.11
    1-methoxy-2-propanol 418.55
    pyridine 107.92
    3-pentanone 102.64
    furfural 159.48
    n-dodecane 15.39
    diethylene glycol 295.48
    diisopropyl ether 71.06
    tert-amyl alcohol 214.83
    acetylacetone 111.18
    n-hexadecane 15.8
    acetophenone 55.06
    methyl propionate 125.04
    isopentyl acetate 35.06
    trichloroethylene 112.55
    n-nonanol 79.48
    cyclohexanol 132.78
    benzyl alcohol 70.17
    2-ethylhexanol 53.14
    isooctanol 59.73
    dipropyl ether 93.16
    1,2-dichlorobenzene 37.88
    ethyl lactate 67.26
    propylene carbonate 75.78
    n-methylformamide 411.6
    2-pentanol 170.32
    n-pentane 74.31
    1-propoxy-2-propanol 150.23
    1-methoxy-2-propyl acetate 66.79
    2-(2-methoxypropoxy) propanol 93.87
    mesitylene 34.44
    ε-caprolactone 84.61
    p-cymene 26.09
    epichlorohydrin 171.11
    1,1,1-trichloroethane 71.03
    2-aminoethanol 399.53
    morpholine-4-carbaldehyde 302.76
    sulfolane 264.22
    2,2,4-trimethylpentane 21.38
    2-methyltetrahydrofuran 170.88
    n-hexyl acetate 62.42
    isooctane 17.97
    2-(2-butoxyethoxy)ethanol 133.74
    sec-butyl acetate 34.71
    tert-butyl acetate 77.17
    decalin 13.91
    glycerin 411.31
    diglyme 199.22
    acrylic acid 132.85
    isopropyl myristate 37.44
    n-butyric acid 125.74
    acetyl acetate 49.95
    di(2-ethylhexyl) phthalate 33.73
    ethyl propionate 61.35
    nitromethane 268.28
    1,2-diethoxyethane 85.7
    benzonitrile 45.3
    trioctyl phosphate 35.0
    1-bromopropane 99.46
    gamma-valerolactone 185.42
    n-decanol 64.13
    triethyl phosphate 34.41
    4-methyl-2-pentanol 85.35
    propionitrile 112.95
    vinylene carbonate 68.42
    1,1,2-trichlorotrifluoroethane 170.69
    DMS 46.61
    cumene 23.03
    2-octanol 70.65
    2-hexanone 63.0
    octyl acetate 47.16
    limonene 37.66
    1,2-dimethoxyethane 319.98
    ethyl orthosilicate 35.26
    tributyl phosphate 31.65
    diacetone alcohol 130.81
    N,N-dimethylaniline 77.1
    acrylonitrile 135.28
    aniline 86.96
    1,3-propanediol 356.27
    bromobenzene 28.3
    dibromomethane 123.22
    1,1,2,2-tetrachloroethane 125.37
    2-methyl-cyclohexyl acetate 34.24
    tetrabutyl urea 52.94
    diisobutyl methanol 44.8
    2-phenylethanol 62.25
    styrene 29.23
    dioctyl adipate 41.11
    dimethyl sulfate 179.63
    ethyl butyrate 45.19
    methyl lactate 150.25
    butyl lactate 56.49
    diethyl carbonate 32.57
    propanediol butyl ether 130.67
    triethyl orthoformate 40.11
    p-tert-butyltoluene 29.43
    methyl 4-tert-butylbenzoate 77.72
    morpholine 265.22
    tert-butylamine 229.16
    n-dodecanol 52.42
    dimethoxymethane 514.63
    ethylene carbonate 62.49
    cyrene 86.47
    2-ethoxyethyl acetate 61.5
    2-ethylhexyl acetate 29.04
    1,2,4-trichlorobenzene 40.81
    4-methylpyridine 93.0
    dibutyl ether 58.04
    2,6-dimethyl-4-heptanol 44.8
    DEF 195.09
    dimethyl isosorbide 108.06
    tetrachloroethylene 110.7
    eugenol 88.79
    triacetin 53.69
    span 80 87.62
    1,4-butanediol 151.15
    1,1-dichloroethane 107.07
    2-methyl-1-pentanol 73.22
    methyl formate 270.0
    2-methyl-1-butanol 123.51
    n-decane 23.1
    butyronitrile 99.39
    3,7-dimethyl-1-octanol 56.55
    1-chlorooctane 45.51
    1-chlorotetradecane 24.31
    n-nonane 23.63
    undecane 18.15
    tert-butylcyclohexane 13.98
    cyclooctane 23.39
    cyclopentanol 178.62
    tetrahydropyran 149.81
    tert-amyl methyl ether 138.07
    2,5,8-trioxanonane 156.99
    1-hexene 57.07
    2-isopropoxyethanol 156.21
    2,2,2-trifluoroethanol 137.79
    methyl butyrate 70.94

    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