Potassium Alum

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  • Identifiers

    CAS number
    10043-67-1

    Molecular formula
    AlKO8S2

    SMILES
    [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Al+3].[K+]

  • Odor profile

    Fragrance
    Odorless 91.36%
    Pungent 13.35%
    Cooked 12.82%
    Savory 12.66%
    Clean 12.02%
    Sharp 10.87%
    Sour 10.71%
    Burnt 9.9%
    Sulfurous 9.9%
    Bitter 8.62%

     

    Flavor
    Bitter 58.91%
    Odorless 42.68%
    Bland 22.94%
    Formyl 20.69%
    Nitrile 20.4%
    Rotten 19.93%
    Mousy 19.21%
    Urine 19.0%
    Bread crust 18.61%
    Roasted peanuts 18.49%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    -1.32 (strong acid)

    Molecular weight
    258.21 g/mol

    Melting point expt.

    • 92.5 °C

    Boiling point

    • 200 °C

    Flash point

    • 79.74 ˚C est.

    Solubility expt.

    • 1 g/ 7.5 ml at 25ºC
    • Freely soluble in water, insoluble in ethanol
    • BECOMES ANHYD @ ABOUT 200 °C; @ HIGHER TEMP LOSES SULFUR TRIOXIDE & BECOMES BASIC & INCOMPLETELY SOL IN WATER. /POTASSIUM ALUM DODECAHYDRATE/
    • 1 G DISSOLVES IN ABOUT 20 ML COLD WATER, ABOUT 1 ML BOILING WATER, INCOMPLETELY; PRACTICALLY INSOL IN ALC.

  • Synonyms

    • Aluminum potassium sulfate
    • Potassium alum
    • 10043-67-1
    • Potash alum
    • Potassium Aluminium Sulfate
    • Alum potassium
    • Aluminum potassium alum
    • Aluminum potassium disulfate
    • Exsiccated alum
    • Potassium aluminum sulfate
    • Potassium aluminum alum
    • Alum, potassium anhydrous
    • Aluminium potassium bis(sulphate)
    • Tai-Ace K 20
    • Tai-Ace K 150
    • Dialuminum dipotassium sulfate
    • Aluminum potassium sulfate, anhydrous
    • CCRIS 6842
    • Potassium alum anhydrous
    • Alum, N.F.
    • Aluminum potassium sulfate, alum
    • HSDB 2685
    • Aluminium potassium sulfate
    • Aluminum potassium sulfate anhydrous
    • potassium aluminum disulfate
    • EINECS 233-141-3
    • Potassium aluminum sulfate (1:1:2)
    • 09OXB01F3O
    • Aluminum potassium sulfate (AlK(SO4)2)
    • Aluminum potassium sulfate (KAl(SO4)2)
    • POTASSIUM-ALUM
    • POTASH-ALUM
    • POTASSIUM-ALUM-
    • aluminum;potassium;disulfate
    • AlK(SO4)2
    • INS NO.522
    • ALUM, POTASSIUM [HSDB]
    • 15007-61-1
    • DTXSID9039234
    • CHEBI:86463
    • INS-522
    • ALUMINUM POTASSIUM SULPHATE
    • EC 233-141-3
    • Sulfuric acid, aluminium potassium salt (2:1:1)
    • aluminium potassium sulfate (1/1/2)
    • ALUMINUM POTASSIUM SULFATE [MI]
    • ALUMINUM POTASSIUM SULFATE [FCC]
    • ALUMINUM POTASSIUM SULFATE [VANDF]
    • ALUMINIUM POTASSIUM SULFATE [WHO-DD]
    • ALUMINIUM POTASSIUM SULFATE ANHYDROUS
    • ALUMINUM POTASSIUM SULPHATE ANHYDROUS
    • ALUMINUM POTASSIUM SULFATE (1:1:2)
    • E-522
    • ALUMINIUM POTASSIUM SULFATE (1:1:2)
    • ALUMINUM POTASSIUM SULPHATE (1:1:2)
    • ALUMINIUM POTASSIUM-SULFATE DODECAHYDRATE
    • Alum, N.F
    • aluminium(3+) ion potassium disulfate
    • UNII-09OXB01F3O
    • Alumen
    • MFCD00003428
    • NHS CONSTIPATION
    • TaiAce K 20
    • TaiAce K 150
    • DTXCID7051
    • ALUMINUMPOTASSIUMSULFATE
    • POTASSIUM ALUM [INCI]
    • DTXCID401476729
    • AKOS015856586
    • ALUMINUM POTASSIUM SULFATE ALUM
    • DB09087
    • DB-220131
    • Aluminium potassium sulfate, pure, anhydrous
    • NS00076457
    • Q411309
    • Aluminum potassium sulfate, puriss., anhydrous, calcined, >=98% (calc with ref. to anhyd. subst.), powder

  • Applications

    Potassium Alum (CAS 10043-67-1), commonly used as a mordant in textile dyeing and printing to fix dyes, as a coagulant/flocculant in water and wastewater treatment to remove impurities, as a sizing agent in papermaking to improve dimensional stability and water resistance, and in cosmetics/personal care as an astringent and deodorant ingredient.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 207.93
    methanol 316.13
    isopropanol 171.54
    water 119.62
    ethyl acetate 57.37
    n-propanol 132.49
    acetone 207.8
    n-butanol 113.18
    acetonitrile 110.21
    DMF 805.46
    toluene 25.41
    isobutanol 85.37
    1,4-dioxane 131.77
    methyl acetate 78.12
    THF 224.34
    2-butanone 106.26
    n-pentanol 67.57
    sec-butanol 122.28
    n-hexane 14.18
    ethylene glycol 161.38
    NMP 373.03
    cyclohexane 22.88
    DMSO 902.25
    n-butyl acetate 30.86
    n-octanol 46.26
    chloroform 43.11
    n-propyl acetate 36.24
    acetic acid 92.42
    dichloromethane 67.48
    cyclohexanone 83.32
    propylene glycol 106.01
    isopropyl acetate 42.7
    DMAc 488.64
    2-ethoxyethanol 150.3
    isopentanol 85.19
    n-heptane 16.5
    ethyl formate 68.4
    1,2-dichloroethane 74.84
    n-hexanol 56.3
    2-methoxyethanol 352.35
    isobutyl acetate 17.28
    tetrachloromethane 15.32
    n-pentyl acetate 32.58
    transcutol 123.82
    n-heptanol 41.92
    ethylbenzene 14.72
    MIBK 53.96
    2-propoxyethanol 121.54
    tert-butanol 189.44
    MTBE 106.92
    2-butoxyethanol 74.01
    propionic acid 69.05
    o-xylene 29.62
    formic acid 159.6
    diethyl ether 126.53
    m-xylene 22.77
    p-xylene 16.81
    chlorobenzene 18.74
    dimethyl carbonate 73.22
    n-octane 8.79
    formamide 263.48
    cyclopentanone 129.02
    2-pentanone 92.88
    anisole 41.91
    cyclopentyl methyl ether 95.7
    gamma-butyrolactone 126.89
    1-methoxy-2-propanol 238.44
    pyridine 78.48
    3-pentanone 74.99
    furfural 120.62
    n-dodecane 6.81
    diethylene glycol 148.65
    diisopropyl ether 37.09
    tert-amyl alcohol 137.43
    acetylacetone 77.12
    n-hexadecane 7.15
    acetophenone 42.05
    methyl propionate 81.64
    isopentyl acetate 24.27
    trichloroethylene 58.62
    n-nonanol 42.03
    cyclohexanol 80.54
    benzyl alcohol 47.11
    2-ethylhexanol 30.23
    isooctanol 29.65
    dipropyl ether 49.84
    1,2-dichlorobenzene 19.8
    ethyl lactate 41.06
    propylene carbonate 51.12
    n-methylformamide 279.2
    2-pentanol 89.51
    n-pentane 32.43
    1-propoxy-2-propanol 84.65
    1-methoxy-2-propyl acetate 46.49
    2-(2-methoxypropoxy) propanol 66.13
    mesitylene 19.38
    ε-caprolactone 62.42
    p-cymene 16.22
    epichlorohydrin 114.99
    1,1,1-trichloroethane 31.17
    2-aminoethanol 165.04
    morpholine-4-carbaldehyde 254.46
    sulfolane 229.51
    2,2,4-trimethylpentane 9.69
    2-methyltetrahydrofuran 114.02
    n-hexyl acetate 38.04
    isooctane 7.61
    2-(2-butoxyethoxy)ethanol 81.13
    sec-butyl acetate 23.07
    tert-butyl acetate 47.12
    decalin 6.37
    glycerin 169.47
    diglyme 132.96
    acrylic acid 72.28
    isopropyl myristate 23.39
    n-butyric acid 63.01
    acetyl acetate 29.65
    di(2-ethylhexyl) phthalate 23.22
    ethyl propionate 40.85
    nitromethane 176.94
    1,2-diethoxyethane 53.35
    benzonitrile 31.67
    trioctyl phosphate 22.03
    1-bromopropane 51.44
    gamma-valerolactone 141.87
    n-decanol 34.86
    triethyl phosphate 24.72
    4-methyl-2-pentanol 46.71
    propionitrile 72.6
    vinylene carbonate 47.8
    1,1,2-trichlorotrifluoroethane 104.84
    DMS 32.78
    cumene 12.81
    2-octanol 34.09
    2-hexanone 46.35
    octyl acetate 30.21
    limonene 25.48
    1,2-dimethoxyethane 208.55
    ethyl orthosilicate 24.42
    tributyl phosphate 20.91
    diacetone alcohol 86.71
    N,N-dimethylaniline 54.85
    acrylonitrile 88.85
    aniline 56.1
    1,3-propanediol 158.8
    bromobenzene 13.95
    dibromomethane 54.95
    1,1,2,2-tetrachloroethane 66.41
    2-methyl-cyclohexyl acetate 24.46
    tetrabutyl urea 41.88
    diisobutyl methanol 25.54
    2-phenylethanol 38.62
    styrene 16.63
    dioctyl adipate 29.87
    dimethyl sulfate 134.1
    ethyl butyrate 31.13
    methyl lactate 92.22
    butyl lactate 33.7
    diethyl carbonate 22.6
    propanediol butyl ether 65.22
    triethyl orthoformate 28.95
    p-tert-butyltoluene 18.31
    methyl 4-tert-butylbenzoate 54.8
    morpholine 168.07
    tert-butylamine 119.05
    n-dodecanol 28.6
    dimethoxymethane 329.99
    ethylene carbonate 40.09
    cyrene 67.56
    2-ethoxyethyl acetate 38.41
    2-ethylhexyl acetate 20.45
    1,2,4-trichlorobenzene 24.47
    4-methylpyridine 74.93
    dibutyl ether 33.44
    2,6-dimethyl-4-heptanol 25.54
    DEF 160.28
    dimethyl isosorbide 79.94
    tetrachloroethylene 49.21
    eugenol 58.34
    triacetin 37.95
    span 80 52.43
    1,4-butanediol 71.21
    1,1-dichloroethane 49.69
    2-methyl-1-pentanol 45.48
    methyl formate 184.0
    2-methyl-1-butanol 77.53
    n-decane 9.88
    butyronitrile 64.85
    3,7-dimethyl-1-octanol 33.46
    1-chlorooctane 21.68
    1-chlorotetradecane 11.93
    n-nonane 10.08
    undecane 8.05
    tert-butylcyclohexane 6.15
    cyclooctane 10.86
    cyclopentanol 101.2
    tetrahydropyran 91.82
    tert-amyl methyl ether 93.07
    2,5,8-trioxanonane 109.72
    1-hexene 27.61
    2-isopropoxyethanol 89.89
    2,2,2-trifluoroethanol 69.71
    methyl butyrate 49.51

    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