Potassium Tetrathionate

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  • Identifiers

    CAS number
    13932-13-3

    Molecular formula
    K2O6S4

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

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 74.21%
    Sulfurous 39.91%
    Onion 30.0%
    Garlic 29.25%
    Cooked 26.83%
    Pungent 25.69%
    Savory 25.4%
    Alliaceous 23.34%
    Roasted 22.69%
    Fresh 16.62%

     

    Flavor
    Bitter 75.55%
    Odorless 26.46%
    Bland 24.14%
    Nitrile 19.65%
    Formyl 18.37%
    Rotten 18.36%
    Taco 18.27%
    Scallion 18.13%
    Roasted peanuts 17.85%
    Bread crust 17.72%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    -2.66 (strong acid)

    Molecular weight
    302.5 g/mol

    Flash point

    • 172.73 ˚C est.

  • Synonyms

    • Potassium tetrathionate
    • 13932-13-3
    • Tetrathionic acid, dipotassium salt
    • Dipotassium tetrathionate
    • Tetrathionic acid, potassium salt (1:2)
    • 8X6V5C8FZ9
    • DTXSID9047043
    • DTXCID7027043
    • CHEBI:86466
    • Tetrathionate, Potassium
    • RefChem:175623
    • 237-702-3
    • POTASSIUMTETRATHIONATE
    • MFCD00079233
    • Caswell No. 702A
    • EINECS 237-702-3
    • EPA Pesticide Chemical Code 075903
    • UNII-8X6V5C8FZ9
    • Potassium tetrathionate [K2S406]
    • K2O6S4
    • SCHEMBL1024273
    • CHEMBL3187989
    • UVTKHPSJNFFIDG-UHFFFAOYSA-L
    • Tox21_302315
    • AKOS015898995
    • FP04247
    • Tetrathionic acid,potassium salt (1:2)
    • NCGC00256144-01
    • POTASSIUM TETRATHIONATE (K2S4O6)
    • SY033064
    • CAS-13932-13-3
    • DB-231703
    • CS-0196759
    • D95168
    • Q3985310
    • 13932-13-3

  • Applications

    Potassium Tetrathionate (CAS 13932-13-3) is used primarily as an intermediate in sulfur-containing synthesis and as a practical sulfur source in materials science; it can serve as a building block for organosulfur compounds and may be involved in polymer and coatings formulations. In analytical chemistry and redox chemistry, it is encountered as a reagent or component of redox systems, and in industry it can be used in electroplating and metal surface-treatment baths where sulfur species help stabilize or complex metal ions. Additional potential applications include serving as a precursor in sulfur-containing coatings and inks, subject to formulation limits and regulatory constraints.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 54.61
    methanol 106.05
    isopropanol 41.57
    water 28.74
    ethyl acetate 114.44
    n-propanol 36.7
    acetone 194.73
    n-butanol 29.04
    acetonitrile 126.38
    DMF 588.39
    toluene 63.25
    isobutanol 26.04
    1,4-dioxane 290.25
    methyl acetate 163.96
    THF 256.08
    2-butanone 138.05
    n-pentanol 22.82
    sec-butanol 40.29
    n-hexane 19.25
    ethylene glycol 37.75
    NMP 486.91
    cyclohexane 43.94
    DMSO 689.26
    n-butyl acetate 46.71
    n-octanol 37.68
    chloroform 124.9
    n-propyl acetate 58.76
    acetic acid 46.81
    dichloromethane 184.52
    cyclohexanone 137.6
    propylene glycol 18.99
    isopropyl acetate 76.79
    DMAc 635.86
    2-ethoxyethanol 113.27
    isopentanol 25.1
    n-heptane 21.09
    ethyl formate 77.69
    1,2-dichloroethane 144.79
    n-hexanol 23.62
    2-methoxyethanol 197.15
    isobutyl acetate 26.38
    tetrachloromethane 47.02
    n-pentyl acetate 40.58
    transcutol 158.88
    n-heptanol 22.45
    ethylbenzene 43.57
    MIBK 60.92
    2-propoxyethanol 85.0
    tert-butanol 58.12
    MTBE 102.83
    2-butoxyethanol 53.42
    propionic acid 38.05
    o-xylene 79.29
    formic acid 66.02
    diethyl ether 154.63
    m-xylene 49.18
    p-xylene 48.99
    chlorobenzene 44.18
    dimethyl carbonate 151.1
    n-octane 15.03
    formamide 208.35
    cyclopentanone 195.2
    2-pentanone 97.82
    anisole 114.03
    cyclopentyl methyl ether 146.36
    gamma-butyrolactone 204.3
    1-methoxy-2-propanol 127.98
    pyridine 131.21
    3-pentanone 135.34
    furfural 208.69
    n-dodecane 12.45
    diethylene glycol 84.32
    diisopropyl ether 63.68
    tert-amyl alcohol 61.79
    acetylacetone 181.27
    n-hexadecane 13.94
    acetophenone 105.66
    methyl propionate 144.73
    isopentyl acetate 36.24
    trichloroethylene 168.27
    n-nonanol 36.91
    cyclohexanol 48.54
    benzyl alcohol 44.62
    2-ethylhexanol 23.38
    isooctanol 18.74
    dipropyl ether 70.95
    1,2-dichlorobenzene 60.02
    ethyl lactate 41.3
    propylene carbonate 81.84
    n-methylformamide 196.85
    2-pentanol 30.34
    n-pentane 22.92
    1-propoxy-2-propanol 62.02
    1-methoxy-2-propyl acetate 80.54
    2-(2-methoxypropoxy) propanol 77.25
    mesitylene 44.11
    ε-caprolactone 109.65
    p-cymene 32.81
    epichlorohydrin 192.39
    1,1,1-trichloroethane 85.19
    2-aminoethanol 42.68
    morpholine-4-carbaldehyde 441.78
    sulfolane 323.62
    2,2,4-trimethylpentane 13.96
    2-methyltetrahydrofuran 152.1
    n-hexyl acetate 54.42
    isooctane 7.54
    2-(2-butoxyethoxy)ethanol 78.05
    sec-butyl acetate 45.71
    tert-butyl acetate 86.81
    decalin 20.18
    glycerin 41.61
    diglyme 220.27
    acrylic acid 43.59
    isopropyl myristate 35.61
    n-butyric acid 31.39
    acetyl acetate 97.33
    di(2-ethylhexyl) phthalate 24.57
    ethyl propionate 84.91
    nitromethane 279.61
    1,2-diethoxyethane 95.24
    benzonitrile 48.58
    trioctyl phosphate 20.28
    1-bromopropane 77.09
    gamma-valerolactone 245.49
    n-decanol 29.95
    triethyl phosphate 53.73
    4-methyl-2-pentanol 19.95
    propionitrile 65.54
    vinylene carbonate 74.96
    1,1,2-trichlorotrifluoroethane 134.56
    DMS 82.14
    cumene 31.62
    2-octanol 24.45
    2-hexanone 62.27
    octyl acetate 41.47
    limonene 48.38
    1,2-dimethoxyethane 329.84
    ethyl orthosilicate 48.7
    tributyl phosphate 23.15
    diacetone alcohol 78.64
    N,N-dimethylaniline 118.19
    acrylonitrile 91.15
    aniline 56.85
    1,3-propanediol 47.7
    bromobenzene 51.28
    dibromomethane 118.13
    1,1,2,2-tetrachloroethane 149.91
    2-methyl-cyclohexyl acetate 45.35
    tetrabutyl urea 50.11
    diisobutyl methanol 22.35
    2-phenylethanol 38.06
    styrene 50.42
    dioctyl adipate 42.15
    dimethyl sulfate 322.41
    ethyl butyrate 57.98
    methyl lactate 79.18
    butyl lactate 27.8
    diethyl carbonate 47.44
    propanediol butyl ether 37.56
    triethyl orthoformate 52.65
    p-tert-butyltoluene 34.15
    methyl 4-tert-butylbenzoate 76.6
    morpholine 225.72
    tert-butylamine 43.25
    n-dodecanol 25.37
    dimethoxymethane 427.92
    ethylene carbonate 65.63
    cyrene 88.96
    2-ethoxyethyl acetate 62.92
    2-ethylhexyl acetate 36.73
    1,2,4-trichlorobenzene 71.64
    4-methylpyridine 114.78
    dibutyl ether 52.41
    2,6-dimethyl-4-heptanol 22.35
    DEF 231.86
    dimethyl isosorbide 139.3
    tetrachloroethylene 114.24
    eugenol 67.26
    triacetin 74.02
    span 80 42.15
    1,4-butanediol 23.68
    1,1-dichloroethane 80.8
    2-methyl-1-pentanol 21.71
    methyl formate 185.18
    2-methyl-1-butanol 27.55
    n-decane 19.19
    butyronitrile 44.43
    3,7-dimethyl-1-octanol 29.71
    1-chlorooctane 36.11
    1-chlorotetradecane 20.15
    n-nonane 19.13
    undecane 14.94
    tert-butylcyclohexane 14.96
    cyclooctane 29.36
    cyclopentanol 56.01
    tetrahydropyran 126.33
    tert-amyl methyl ether 117.83
    2,5,8-trioxanonane 166.02
    1-hexene 27.44
    2-isopropoxyethanol 70.92
    2,2,2-trifluoroethanol 61.1
    methyl butyrate 81.89

    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