Pentapotassium Triphosphate

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  • Identifiers

    CAS number
    13845-36-8

    Molecular formula
    K5O10P3

    SMILES
    [O-]P(=O)([O-])OP(=O)([O-])OP(=O)([O-])[O-].[K+].[K+].[K+].[K+].[K+]

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 74.84%
    Clean 17.9%
    Sweet 16.36%
    Balsamic 13.9%
    Alcoholic 12.99%
    Sour 12.57%
    Fresh 12.37%
    Cooling 12.08%
    Savory 11.96%
    Ethereal 11.88%

     

    Flavor
    Odorless 61.65%
    Sour 24.59%
    Bland 23.97%
    Mild 21.67%
    Very mild 20.57%
    Yeast 19.16%
    Formyl 18.65%
    Mousy 18.25%
    Rotten 18.16%
    Stinky 17.89%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    -1.33 (strong acid)

    Molecular weight
    448.41 g/mol

    Flash point

    • 226.48 ˚C est.

    Solubility expt.

    • Very soluble in water

  • Synonyms

    • Pentapotassium triphosphate
    • 13845-36-8
    • potassium triphosphate
    • Triphosphoric acid, potassium salt (1:5)
    • KTPP
    • Triphosphoric acid, pentapotassium salt
    • NCS08RO8PB
    • Potassium triphosphate (K5P3O10)
    • DTXSID2047482
    • RefChem:171461
    • DTXCID0027482
    • 237-574-9
    • MFCD00054129
    • pentapotassium;[oxido(phosphonatooxy)phosphoryl] phosphate
    • K5O10P3
    • UNII-NCS08RO8PB
    • Potassiumtriphosphate
    • EINECS 237-574-9
    • potassium tri phosphate
    • EC 237-574-9
    • SCHEMBL36118
    • NAA84536
    • AKOS025294462
    • Potassium triphosphate (K5(P3O10))
    • POTASSIUM PHOSPHATE (K5P3O10)
    • DB-042428
    • NS00013969
    • Q15632716
    • TRIPHOSPHORIC ACID PENTAPOTASSIUM SALT CLASSIFICATION: INORGANIC
    • 13845-36-8

  • Applications

    Pentapotassium Triphosphate (CAS 13845-36-8) is commonly used as a water-softening and chelating agent in detergents and cleaning formulations, helping to bind calcium and magnesium ions and improve efficacy. It also acts as a scale inhibitor and corrosion inhibitor in industrial water treatment and cooling systems to reduce mineral buildup and protect equipment. In food processing, it serves as a sequestrant and texture/moisture-retention aid in select products. In cosmetics and personal care, it functions as a chelating agent to stabilize formulations and prevent metal-catalyzed degradation. In coatings and inks, it serves as a dispersant and stabilizer to improve pigment dispersion and prevent precipitation. In other industrial manufacturing contexts, it can act as a buffering agent and mineral-content modifier to tune formulation properties.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 746.73
    methanol 1449.05
    isopropanol 631.62
    water 1212.99
    ethyl acetate 424.36
    n-propanol 547.28
    acetone 944.17
    n-butanol 444.31
    acetonitrile 625.89
    DMF 3139.41
    toluene 168.55
    isobutanol 384.76
    1,4-dioxane 501.88
    methyl acetate 451.68
    THF 1357.67
    2-butanone 540.39
    n-pentanol 302.2
    sec-butanol 460.29
    n-hexane 58.56
    ethylene glycol 781.81
    NMP 1524.58
    cyclohexane 50.92
    DMSO 2622.19
    n-butyl acetate 211.23
    n-octanol 200.22
    chloroform 248.86
    n-propyl acetate 305.99
    acetic acid 365.07
    dichloromethane 319.42
    cyclohexanone 362.72
    propylene glycol 665.75
    isopropyl acetate 323.51
    DMAc 2019.7
    2-ethoxyethanol 817.89
    isopentanol 309.25
    n-heptane 60.23
    ethyl formate 467.34
    1,2-dichloroethane 329.21
    n-hexanol 302.57
    2-methoxyethanol 1551.59
    isobutyl acetate 168.53
    tetrachloromethane 80.49
    n-pentyl acetate 170.03
    transcutol 537.44
    n-heptanol 193.56
    ethylbenzene 85.37
    MIBK 360.03
    2-propoxyethanol 966.7
    tert-butanol 640.98
    MTBE 371.41
    2-butoxyethanol 418.74
    propionic acid 381.88
    o-xylene 134.34
    formic acid 696.79
    diethyl ether 567.88
    m-xylene 167.27
    p-xylene 85.84
    chlorobenzene 96.88
    dimethyl carbonate 729.29
    n-octane 32.69
    formamide 1093.15
    cyclopentanone 728.61
    2-pentanone 565.25
    anisole 248.32
    cyclopentyl methyl ether 609.73
    gamma-butyrolactone 793.65
    1-methoxy-2-propanol 1515.34
    pyridine 346.42
    3-pentanone 467.7
    furfural 597.47
    n-dodecane 26.17
    diethylene glycol 1009.18
    diisopropyl ether 201.45
    tert-amyl alcohol 435.79
    acetylacetone 535.66
    n-hexadecane 26.73
    acetophenone 254.17
    methyl propionate 673.93
    isopentyl acetate 139.53
    trichloroethylene 270.15
    n-nonanol 186.71
    cyclohexanol 291.69
    benzyl alcohol 257.55
    2-ethylhexanol 139.41
    isooctanol 126.02
    dipropyl ether 319.54
    1,2-dichlorobenzene 89.65
    ethyl lactate 405.51
    propylene carbonate 384.25
    n-methylformamide 1457.44
    2-pentanol 392.37
    n-pentane 98.91
    1-propoxy-2-propanol 654.68
    1-methoxy-2-propyl acetate 416.72
    2-(2-methoxypropoxy) propanol 347.93
    mesitylene 120.19
    ε-caprolactone 323.98
    p-cymene 71.58
    epichlorohydrin 677.22
    1,1,1-trichloroethane 157.97
    2-aminoethanol 775.98
    morpholine-4-carbaldehyde 1061.9
    sulfolane 1011.76
    2,2,4-trimethylpentane 32.6
    2-methyltetrahydrofuran 514.0
    n-hexyl acetate 199.17
    isooctane 32.7
    2-(2-butoxyethoxy)ethanol 403.07
    sec-butyl acetate 187.85
    tert-butyl acetate 308.9
    decalin 22.77
    glycerin 990.86
    diglyme 564.1
    acrylic acid 402.94
    isopropyl myristate 111.68
    n-butyric acid 348.66
    acetyl acetate 216.48
    di(2-ethylhexyl) phthalate 103.43
    ethyl propionate 391.51
    nitromethane 809.35
    1,2-diethoxyethane 268.87
    benzonitrile 170.65
    trioctyl phosphate 116.05
    1-bromopropane 226.13
    gamma-valerolactone 770.21
    n-decanol 155.91
    triethyl phosphate 143.29
    4-methyl-2-pentanol 226.56
    propionitrile 484.06
    vinylene carbonate 358.25
    1,1,2-trichlorotrifluoroethane 535.38
    DMS 228.73
    cumene 67.07
    2-octanol 147.08
    2-hexanone 309.7
    octyl acetate 153.96
    limonene 92.37
    1,2-dimethoxyethane 995.66
    ethyl orthosilicate 136.24
    tributyl phosphate 113.74
    diacetone alcohol 504.73
    N,N-dimethylaniline 285.57
    acrylonitrile 570.24
    aniline 299.07
    1,3-propanediol 704.79
    bromobenzene 73.1
    dibromomethane 237.34
    1,1,2,2-tetrachloroethane 283.77
    2-methyl-cyclohexyl acetate 131.88
    tetrabutyl urea 209.14
    diisobutyl methanol 115.82
    2-phenylethanol 237.29
    styrene 89.64
    dioctyl adipate 147.42
    dimethyl sulfate 939.03
    ethyl butyrate 229.35
    methyl lactate 803.8
    butyl lactate 230.87
    diethyl carbonate 176.13
    propanediol butyl ether 356.28
    triethyl orthoformate 190.75
    p-tert-butyltoluene 86.56
    methyl 4-tert-butylbenzoate 252.34
    morpholine 691.24
    tert-butylamine 416.5
    n-dodecanol 126.92
    dimethoxymethane 2260.58
    ethylene carbonate 329.27
    cyrene 423.48
    2-ethoxyethyl acetate 230.2
    2-ethylhexyl acetate 109.01
    1,2,4-trichlorobenzene 98.03
    4-methylpyridine 349.31
    dibutyl ether 132.16
    2,6-dimethyl-4-heptanol 115.82
    DEF 808.16
    dimethyl isosorbide 496.37
    tetrachloroethylene 196.98
    eugenol 328.84
    triacetin 201.92
    span 80 269.09
    1,4-butanediol 387.76
    1,1-dichloroethane 250.39
    2-methyl-1-pentanol 184.95
    methyl formate 1074.52
    2-methyl-1-butanol 308.11
    n-decane 37.92
    butyronitrile 389.68
    3,7-dimethyl-1-octanol 126.95
    1-chlorooctane 86.23
    1-chlorotetradecane 48.89
    n-nonane 37.63
    undecane 30.97
    tert-butylcyclohexane 26.01
    cyclooctane 35.23
    cyclopentanol 459.52
    tetrahydropyran 372.69
    tert-amyl methyl ether 358.42
    2,5,8-trioxanonane 480.57
    1-hexene 123.92
    2-isopropoxyethanol 516.18
    2,2,2-trifluoroethanol 390.73
    methyl butyrate 397.57

    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