Potassium Fluoride

Overview IFRA Request a quote

  • Identifiers

    CAS number
    7789-23-3

    Molecular formula
    FK

    SMILES
    [F-].[K+]

    Safety labels

    Acute Toxic
    Acute Toxic

  • Odor profile

    Odor impact est.
    High

  • Properties

    pKa est.
    -5.89 (strong acid)

    Molecular weight
    58.0967 g/mol

    Melting point expt.

    • 1576 °F (NTP, 1992)
    • 858 °C
    • Crystals; melting point: 19.3 °C /Tetrahydrate/

    Boiling point

    • 2741 °F at 760 mmHg (NTP, 1992)
    • 1502 °C

    Flash point

    • -46.7 ˚C est.

    Solubility expt.

    • greater than or equal to 100 mg/mL at 66 °F (NTP, 1992)
    • Soluble in water, hydrogen fluoride; insoluble in alcohol
    • 102 g/100 g water at 25 °C

  • Synonyms

    • POTASSIUM FLUORIDE
    • 7789-23-3
    • Potassium fluoride (KF)
    • Fluorure de potassium
    • Potassium fluorure
    • DTXSID8031940
    • 9082WG1G3F
    • CHEBI:66872
    • Kali Fluoratum
    • RefChem:6156
    • DTXCID6011940
    • 232-151-5
    • Potassiumfluoride
    • Potassium fluoride, anhydrous
    • potassium;fluoride
    • 12178-06-2
    • Potassium fluoride on calcium fluoride
    • MFCD00011398
    • Potassium fluoride anhydrous
    • Potassium fluoride on alumina
    • CHEMBL1644027
    • Potassium fluoride on aluminum oxide
    • Potassium fluorure [French]
    • CCRIS 1568
    • Fluorure de potassium [French]
    • HSDB 7481
    • EINECS 232-151-5
    • UN1812
    • kalium fluoride
    • UNII-9082WG1G3F
    • fluoro-potassium
    • potasium fluoride
    • potassium floride
    • potassium flouride
    • potassiurn fluoride
    • potassium fluoride-
    • EC 232-151-5
    • SCHEMBL6175
    • SCHEMBL550352
    • orb2939719
    • POTASSIUM FLUORIDE [MI]
    • Potassium fluoride, ACS reagent
    • POTASSIUM FLUORIDE [HSDB]
    • POTASSIUM FLUORIDE [WHO-DD]
    • AKOS015833194
    • AKOS015911348
    • AT49444
    • Potassium fluoride, 50wt-% on Celite
    • Potassium fluoride, 40wt-% on Alumina
    • BP-10938
    • Potassium fluoride [UN1812] [Poison]
    • NS00080847
    • P1758
    • Potassium fluoride, Trace metals grade 99.8%
    • A839269
    • F003835
    • Q422426
    • POTASSIUM FLUORIDE (TRACE METALS GRADE 99.8%)
    • 7789-23-3

  • Applications

    Potassium fluoride (CAS 7789-23-3) serves primarily as a fluoride source in organic synthesis, enabling the formation of organofluorine compounds and various fluorination steps, often used with phase-transfer catalysts or as a mild fluoride donor. In the glass and ceramic industries, it is employed as a flux/additive in glazes and during finishing to influence melting behavior and glaze formation. It also finds use in specialty metal finishing and surface-preparation baths for oxide removal and pre-treatment of metal and glass surfaces. In analytical and quality-control settings, KF is used as a fluoride source for standard solutions and as a reagent in fluoride ion determinations. Additionally, it is encountered as an intermediate or reagent in the preparation of other fluoride-containing specialty chemicals and fluorination reagents in research contexts.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 140.04
    methanol 225.6
    isopropanol 96.76
    water 29.26
    ethyl acetate 37.04
    n-propanol 81.37
    acetone 101.32
    n-butanol 64.01
    acetonitrile 92.45
    DMF 283.63
    toluene 11.49
    isobutanol 58.68
    1,4-dioxane 84.57
    methyl acetate 58.09
    THF 84.28
    2-butanone 56.17
    n-pentanol 43.21
    sec-butanol 67.67
    n-hexane 6.27
    ethylene glycol 96.6
    NMP 162.2
    cyclohexane 5.8
    DMSO 214.9
    n-butyl acetate 21.86
    n-octanol 28.97
    chloroform 43.0
    n-propyl acetate 24.29
    acetic acid 151.81
    dichloromethane 51.36
    cyclohexanone 47.54
    propylene glycol 65.73
    isopropyl acetate 22.15
    DMAc 177.05
    2-ethoxyethanol 85.6
    isopentanol 52.81
    n-heptane 5.0
    ethyl formate 36.64
    1,2-dichloroethane 37.18
    n-hexanol 32.63
    2-methoxyethanol 149.05
    isobutyl acetate 14.74
    tetrachloromethane 9.79
    n-pentyl acetate 19.94
    transcutol 202.84
    n-heptanol 20.16
    ethylbenzene 9.36
    MIBK 26.89
    2-propoxyethanol 63.13
    tert-butanol 104.09
    MTBE 49.56
    2-butoxyethanol 42.98
    propionic acid 74.05
    o-xylene 14.7
    formic acid 116.39
    diethyl ether 44.83
    m-xylene 12.14
    p-xylene 13.38
    chlorobenzene 17.68
    dimethyl carbonate 27.28
    n-octane 2.74
    formamide 133.29
    cyclopentanone 63.25
    2-pentanone 38.53
    anisole 30.19
    cyclopentyl methyl ether 35.37
    gamma-butyrolactone 78.48
    1-methoxy-2-propanol 93.96
    pyridine 50.66
    3-pentanone 31.36
    furfural 77.44
    n-dodecane 3.14
    diethylene glycol 78.15
    diisopropyl ether 14.3
    tert-amyl alcohol 72.8
    acetylacetone 42.68
    n-hexadecane 3.22
    acetophenone 27.7
    methyl propionate 40.32
    isopentyl acetate 20.94
    trichloroethylene 53.86
    n-nonanol 24.29
    cyclohexanol 40.04
    benzyl alcohol 29.84
    2-ethylhexanol 19.53
    isooctanol 16.84
    dipropyl ether 19.04
    1,2-dichlorobenzene 19.14
    ethyl lactate 22.04
    propylene carbonate 36.37
    n-methylformamide 126.16
    2-pentanol 42.31
    n-pentane 7.91
    1-propoxy-2-propanol 42.12
    1-methoxy-2-propyl acetate 28.3
    2-(2-methoxypropoxy) propanol 50.8
    mesitylene 9.99
    ε-caprolactone 43.16
    p-cymene 9.23
    epichlorohydrin 63.15
    1,1,1-trichloroethane 26.86
    2-aminoethanol 105.53
    morpholine-4-carbaldehyde 140.02
    sulfolane 94.93
    2,2,4-trimethylpentane 5.47
    2-methyltetrahydrofuran 53.39
    n-hexyl acetate 33.35
    isooctane 4.29
    2-(2-butoxyethoxy)ethanol 66.73
    sec-butyl acetate 16.0
    tert-butyl acetate 27.37
    decalin 4.28
    glycerin 89.78
    diglyme 108.28
    acrylic acid 84.74
    isopropyl myristate 14.96
    n-butyric acid 54.39
    acetyl acetate 25.27
    di(2-ethylhexyl) phthalate 15.99
    ethyl propionate 24.06
    nitromethane 161.21
    1,2-diethoxyethane 41.14
    benzonitrile 31.51
    trioctyl phosphate 12.86
    1-bromopropane 22.53
    gamma-valerolactone 84.69
    n-decanol 19.1
    triethyl phosphate 13.66
    4-methyl-2-pentanol 24.66
    propionitrile 48.83
    vinylene carbonate 35.16
    1,1,2-trichlorotrifluoroethane 67.06
    DMS 30.27
    cumene 8.83
    2-octanol 16.25
    2-hexanone 28.19
    octyl acetate 19.78
    limonene 13.42
    1,2-dimethoxyethane 106.21
    ethyl orthosilicate 13.55
    tributyl phosphate 15.1
    diacetone alcohol 46.45
    N,N-dimethylaniline 27.97
    acrylonitrile 71.81
    aniline 26.79
    1,3-propanediol 96.79
    bromobenzene 14.58
    dibromomethane 32.05
    1,1,2,2-tetrachloroethane 43.68
    2-methyl-cyclohexyl acetate 17.69
    tetrabutyl urea 22.65
    diisobutyl methanol 14.62
    2-phenylethanol 24.7
    styrene 12.22
    dioctyl adipate 21.44
    dimethyl sulfate 48.69
    ethyl butyrate 18.96
    methyl lactate 38.14
    butyl lactate 22.62
    diethyl carbonate 15.41
    propanediol butyl ether 56.74
    triethyl orthoformate 16.44
    p-tert-butyltoluene 9.37
    methyl 4-tert-butylbenzoate 33.15
    morpholine 95.84
    tert-butylamine 62.38
    n-dodecanol 15.37
    dimethoxymethane 91.75
    ethylene carbonate 27.82
    cyrene 39.5
    2-ethoxyethyl acetate 29.39
    2-ethylhexyl acetate 16.25
    1,2,4-trichlorobenzene 23.92
    4-methylpyridine 45.54
    dibutyl ether 22.69
    2,6-dimethyl-4-heptanol 14.62
    DEF 71.19
    dimethyl isosorbide 57.94
    tetrachloroethylene 32.4
    eugenol 37.84
    triacetin 34.36
    span 80 38.61
    1,4-butanediol 48.85
    1,1-dichloroethane 33.45
    2-methyl-1-pentanol 36.55
    methyl formate 82.7
    2-methyl-1-butanol 50.52
    n-decane 4.2
    butyronitrile 39.7
    3,7-dimethyl-1-octanol 25.59
    1-chlorooctane 12.97
    1-chlorotetradecane 6.72
    n-nonane 4.1
    undecane 3.55
    tert-butylcyclohexane 4.73
    cyclooctane 2.5
    cyclopentanol 49.66
    tetrahydropyran 49.17
    tert-amyl methyl ether 36.8
    2,5,8-trioxanonane 83.13
    1-hexene 16.0
    2-isopropoxyethanol 50.66
    2,2,2-trifluoroethanol 49.28
    methyl butyrate 31.32

    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