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

    Odorless 96.48%
    Bitter 11.66%
    Sharp 10.76%
    Pungent 10.39%
    Clean 9.95%
    Sour 9.27%
    Cooked 8.42%
    Savory 7.65%
    Burnt 7.58%
    Malty 7.19%

    Scent© AI

  • Properties

    pKa est.
    -193955.03 (strong acid)

    Molecular weight
    258.21 g/mol

    Melting point expt.

    • 92.5 °C

    Boiling point

    • 200 °C

    Flash point est.
    196.43 ˚C

    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

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 20.45
    methanol 38.22
    isopropanol 9.79
    water 81.54
    ethyl acetate 4.59
    n-propanol 9.52
    acetone 15.95
    n-butanol 6.51
    acetonitrile 8.36
    DMF 173.53
    toluene 1.35
    isobutanol 4.35
    1,4-dioxane 9.47
    methyl acetate 7.48
    THF 25.88
    2-butanone 7.46
    n-pentanol 3.87
    sec-butanol 5.99
    n-hexane 0.74
    ethylene glycol 29.37
    NMP 116.91
    cyclohexane 0.95
    DMSO 261.58
    n-butyl acetate 5.18
    n-octanol 3.52
    chloroform 4.46
    n-propyl acetate 3.43
    acetic acid 15.34
    dichloromethane 7.89
    cyclohexanone 5.55
    propylene glycol 15.35
    isopropyl acetate 2.9
    DMAc 154.64
    2-ethoxyethanol 27.23
    isopentanol 3.82
    n-heptane 1.32
    ethyl formate 12.18
    1,2-dichloroethane 7.78
    n-hexanol 4.98
    2-methoxyethanol 70.35
    isobutyl acetate 1.13
    tetrachloromethane 1.6
    n-pentyl acetate 4.06
    transcutol 19.67
    n-heptanol 4.47
    ethylbenzene 0.92
    MIBK 2.47
    2-propoxyethanol 26.41
    tert-butanol 8.51
    MTBE 2.71
    2-butoxyethanol 15.65
    propionic acid 11.26
    o-xylene 2.04
    formic acid 55.37
    diethyl ether 5.72
    m-xylene 1.28
    p-xylene 1.08
    chlorobenzene 0.92
    dimethyl carbonate 14.17
    n-octane 0.68
    formamide 96.96
    cyclopentanone 13.99
    2-pentanone 5.16
    anisole 2.52
    cyclopentyl methyl ether 6.09
    gamma-butyrolactone 29.02
    1-methoxy-2-propanol 39.31
    pyridine 7.89
    3-pentanone 5.55
    furfural 29.22
    n-dodecane 0.37
    diethylene glycol 43.85
    diisopropyl ether 1.24
    tert-amyl alcohol 5.96
    acetylacetone 7.44
    n-hexadecane 0.4
    acetophenone 4.46
    methyl propionate 9.77
    isopentyl acetate 3.13
    trichloroethylene 6.84
    n-nonanol 3.37
    cyclohexanol 3.53
    benzyl alcohol 4.19
    2-ethylhexanol 2.61
    isooctanol 2.81
    dipropyl ether 4.88
    1,2-dichlorobenzene 1.49
    ethyl lactate 10.12
    propylene carbonate 12.33
    n-methylformamide 63.74
    2-pentanol 3.81
    n-pentane 1.15
    1-propoxy-2-propanol 16.85
    1-methoxy-2-propyl acetate 9.61
    2-(2-methoxypropoxy) propanol 13.37
    mesitylene 1.09
    ε-caprolactone 8.01
    p-cymene 1.5
    epichlorohydrin 18.25
    1,1,1-trichloroethane 1.87
    2-aminoethanol 26.7
    morpholine-4-carbaldehyde 61.45
    sulfolane 63.61
    2,2,4-trimethylpentane 0.26
    2-methyltetrahydrofuran 7.57
    n-hexyl acetate 3.73
    isooctane 0.14
    2-(2-butoxyethoxy)ethanol 14.15
    sec-butyl acetate 1.53
    tert-butyl acetate 3.0
    decalin 0.29
    glycerin 43.54
    diglyme 27.51
    acrylic acid 14.58
    isopropyl myristate 1.79
    n-butyric acid 8.52
    acetyl acetate 2.98
    di(2-ethylhexyl) phthalate 3.73
    ethyl propionate 4.0
    nitromethane 35.59
    1,2-diethoxyethane 5.9
    benzonitrile 2.76
    trioctyl phosphate 3.25
    1-bromopropane 3.31
    gamma-valerolactone 24.75
    n-decanol 2.76
    triethyl phosphate 5.33
    4-methyl-2-pentanol 1.79
    propionitrile 5.47
    vinylene carbonate 10.62
    1,1,2-trichlorotrifluoroethane 28.03
    DMS 5.75
    cumene 0.78
    2-octanol 2.8
    2-hexanone 2.86
    octyl acetate 2.94
    limonene 1.85
    1,2-dimethoxyethane 32.18
    ethyl orthosilicate 4.56
    tributyl phosphate 3.31
    diacetone alcohol 9.77
    N,N-dimethylaniline 4.94
    acrylonitrile 9.72
    aniline 4.03
    1,3-propanediol 24.4
    bromobenzene 0.72
    dibromomethane 4.88
    1,1,2,2-tetrachloroethane 8.07
    2-methyl-cyclohexyl acetate 3.4
    tetrabutyl urea 6.96
    diisobutyl methanol 1.87
    2-phenylethanol 5.13
    styrene 0.93
    dioctyl adipate 3.63
    dimethyl sulfate 40.71
    ethyl butyrate 4.61
    methyl lactate 24.88
    butyl lactate 8.73
    diethyl carbonate 4.41
    propanediol butyl ether 11.89
    triethyl orthoformate 5.06
    p-tert-butyltoluene 1.53
    methyl 4-tert-butylbenzoate 9.16
    morpholine 16.63
    tert-butylamine 4.63
    n-dodecanol 2.16
    dimethoxymethane 60.61
    ethylene carbonate 7.97
    cyrene 18.48
    2-ethoxyethyl acetate 6.79
    2-ethylhexyl acetate 2.48
    1,2,4-trichlorobenzene 2.07
    4-methylpyridine 5.42
    dibutyl ether 2.12
    2,6-dimethyl-4-heptanol 1.87
    DEF 21.39
    dimethyl isosorbide 20.82
    tetrachloroethylene 6.64
    eugenol 12.87
    triacetin 7.22
    span 80 9.1
    1,4-butanediol 10.28
    1,1-dichloroethane 2.56
    2-methyl-1-pentanol 2.11
    methyl formate 44.71
    2-methyl-1-butanol 3.77
    n-decane 0.59
    butyronitrile 3.98
    3,7-dimethyl-1-octanol 2.1
    1-chlorooctane 1.31
    1-chlorotetradecane 0.67
    n-nonane 0.62
    undecane 0.45
    tert-butylcyclohexane 0.21
    cyclooctane 0.55
    cyclopentanol 7.34
    tetrahydropyran 4.26
    tert-amyl methyl ether 3.28
    2,5,8-trioxanonane 22.28
    1-hexene 1.25
    2-isopropoxyethanol 11.69
    2,2,2-trifluoroethanol 21.21
    methyl butyrate 5.52

    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