Potassium Persulfate

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  • Identifiers

    CAS number
    7727-21-1

    Molecular formula
    K2O8S2

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

    Safety labels

    Oxidizer
    Oxidizer

    Irritant
    Irritant

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Odorless 87.15%
    Sulfurous 17.68%
    Cooked 16.05%
    Savory 15.78%
    Pungent 13.52%
    Clean 12.9%
    Burnt 11.47%
    Garlic 10.95%
    Fresh 10.8%
    Roasted 10.26%

     

    Flavor
    Bitter 77.75%
    Odorless 33.27%
    Bland 27.36%
    Nitrile 19.62%
    Formyl 18.8%
    Rotten 18.43%
    Taco 18.15%
    Bread crust 17.96%
    Roasted peanuts 17.66%
    Scallion 17.56%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    -2.45 (strong acid)

    Molecular weight
    270.33 g/mol

    Flash point

    • 174.34 ˚C est.

    Solubility expt.

    • 1.75 G IN 100 CC OF WATER @ 0 °C
    • 5.2 G IN 100 CC OF HOT WATER @ 20 °C
    • INSOL IN ALCOHOL
    • Solubility in water, g/100ml at 20 °C: 5.2

  • Synonyms

    • POTASSIUM PERSULFATE
    • 7727-21-1
    • Potassium peroxydisulfate
    • Anthion
    • Potassium peroxodisulfate
    • Potassium peroxydisulphate
    • Dipotassium peroxydisulfate
    • Dipotassium persulfate
    • potassium persulphate
    • Caswell No. 700
    • Peroxydisulfuric acid, dipotassium salt
    • HSDB 2638
    • UNII-6B86K0MCZC
    • EINECS 231-781-8
    • 6B86K0MCZC
    • MFCD00011386
    • UN1492
    • EPA Pesticide Chemical Code 063602
    • Potassium peroxydisulfate (K2(S2O8))
    • dipotassium;sulfonatooxy sulfate
    • DTXSID4029690
    • DIPOTASSIUM PERSULPHATE
    • DTXCID809690
    • POTASSIUM PERSULFATE [MI]
    • DIPOTASSIUM PEROXYDISULPHATE
    • EC 231-781-8
    • POTASSIUM PERSULFATE [HSDB]
    • POTASSIUM PERSULFATE [VANDF]
    • NSC 326763
    • NSC-326763
    • Virkon S
    • Dipotassium peroxodisulphate
    • POTASSIUM PEROXYDISULFATE [K2(S2O8)]
    • K2S2O8
    • PEROXYDISULFURIC ACID, (((HO)S(O)2)2O2), DIPOTASSIUM SALT
    • PEROXYDISULFURIC ACID, ([(HO)S(O)2]2O2), DIPOTASSIUM SALT
    • potasium persulfate
    • potassium persuifate
    • Peroxydisulfuric acid (((HO)S(O)2)2O2) , dipotassium salt
    • potassium monopersulphate
    • potassium peroxidisulfate
    • CHEMBL3186858
    • DIPOTASSIUM PEROXODISULFATE
    • POTASSIUM PERSULFATE [INCI]
    • Tox21_200798
    • Peroxydisulfuric acid dipotassium salt
    • AKOS015950646
    • FP41087
    • Potassium persulfate, ACS Reagent Grade
    • NCGC00258352-01
    • BP-13445
    • CAS-7727-21-1
    • NS00081344
    • Potassium peroxydisulfate, low nitrogen, ACS
    • Potassium persulfate [UN1492] [Oxidizer]
    • dipotassium [(sulfonatoperoxy)sulfonyl]oxidanide
    • Potassium persulfate, Trace metals grade 99.99%
    • Q415226
    • Peroxydisulfuric acid (((HO)S(O)2)2O2), potassium salt (1:2)
    • 231-781-8

  • Applications

    Potassium Persulfate (CAS 7727-21-1) is widely used as a free-radical initiator in aqueous polymerizations of vinyl monomers (such as acrylates and styrene), supporting coatings, adhesives, and plastics. It also serves as a strong oxidizer in hair bleaching formulations and in textile and paper bleaching processes. In electronics manufacturing, it is employed as a copper etchant and surface-cleaning agent for PCB production. It functions as an oxidant in water treatment and pool sanitation systems, and appears in industrial cleaners and surface-preparation formulations, with use subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 5.63
    methanol 11.15
    isopropanol 3.33
    water 1.32
    ethyl acetate 8.63
    n-propanol 3.08
    acetone 21.58
    n-butanol 2.27
    acetonitrile 9.03
    DMF 104.33
    toluene 3.47
    isobutanol 1.73
    1,4-dioxane 22.65
    methyl acetate 14.46
    THF 19.96
    2-butanone 14.44
    n-pentanol 1.82
    sec-butanol 3.16
    n-hexane 0.64
    ethylene glycol 4.25
    NMP 94.48
    cyclohexane 2.17
    DMSO 207.22
    n-butyl acetate 5.62
    n-octanol 3.23
    chloroform 4.89
    n-propyl acetate 3.3
    acetic acid 4.84
    dichloromethane 11.17
    cyclohexanone 11.65
    propylene glycol 1.71
    isopropyl acetate 4.63
    DMAc 120.39
    2-ethoxyethanol 11.88
    isopentanol 1.83
    n-heptane 1.57
    ethyl formate 7.43
    1,2-dichloroethane 12.07
    n-hexanol 2.2
    2-methoxyethanol 25.05
    isobutyl acetate 0.9
    tetrachloromethane 1.71
    n-pentyl acetate 5.37
    transcutol 21.3
    n-heptanol 2.58
    ethylbenzene 1.93
    MIBK 3.32
    2-propoxyethanol 9.37
    tert-butanol 4.73
    MTBE 7.53
    2-butoxyethanol 6.71
    propionic acid 3.61
    o-xylene 5.11
    formic acid 9.17
    diethyl ether 11.28
    m-xylene 2.35
    p-xylene 2.19
    chlorobenzene 2.56
    dimethyl carbonate 9.26
    n-octane 0.96
    formamide 34.17
    cyclopentanone 17.11
    2-pentanone 7.72
    anisole 5.38
    cyclopentyl methyl ether 8.84
    gamma-butyrolactone 19.67
    1-methoxy-2-propanol 12.18
    pyridine 15.42
    3-pentanone 11.19
    furfural 24.05
    n-dodecane 0.64
    diethylene glycol 10.58
    diisopropyl ether 3.03
    tert-amyl alcohol 4.8
    acetylacetone 12.57
    n-hexadecane 0.75
    acetophenone 6.73
    methyl propionate 11.61
    isopentyl acetate 3.66
    trichloroethylene 11.56
    n-nonanol 3.23
    cyclohexanol 3.24
    benzyl alcohol 3.4
    2-ethylhexanol 2.01
    isooctanol 1.81
    dipropyl ether 5.85
    1,2-dichlorobenzene 3.51
    ethyl lactate 2.77
    propylene carbonate 5.69
    n-methylformamide 27.46
    2-pentanol 2.11
    n-pentane 1.09
    1-propoxy-2-propanol 6.88
    1-methoxy-2-propyl acetate 7.33
    2-(2-methoxypropoxy) propanol 8.93
    mesitylene 1.98
    ε-caprolactone 9.71
    p-cymene 2.79
    epichlorohydrin 17.89
    1,1,1-trichloroethane 3.56
    2-aminoethanol 4.33
    morpholine-4-carbaldehyde 54.97
    sulfolane 48.75
    2,2,4-trimethylpentane 0.5
    2-methyltetrahydrofuran 12.55
    n-hexyl acetate 5.57
    isooctane 0.22
    2-(2-butoxyethoxy)ethanol 9.72
    sec-butyl acetate 2.03
    tert-butyl acetate 4.67
    decalin 0.61
    glycerin 4.53
    diglyme 27.39
    acrylic acid 4.71
    isopropyl myristate 2.87
    n-butyric acid 2.82
    acetyl acetate 5.25
    di(2-ethylhexyl) phthalate 2.4
    ethyl propionate 4.43
    nitromethane 32.42
    1,2-diethoxyethane 10.91
    benzonitrile 3.76
    trioctyl phosphate 2.18
    1-bromopropane 4.7
    gamma-valerolactone 24.59
    n-decanol 2.56
    triethyl phosphate 3.82
    4-methyl-2-pentanol 1.13
    propionitrile 4.9
    vinylene carbonate 5.59
    1,1,2-trichlorotrifluoroethane 15.26
    DMS 7.21
    cumene 1.31
    2-octanol 2.48
    2-hexanone 3.84
    octyl acetate 3.8
    limonene 4.09
    1,2-dimethoxyethane 27.79
    ethyl orthosilicate 3.51
    tributyl phosphate 2.23
    diacetone alcohol 6.29
    N,N-dimethylaniline 6.51
    acrylonitrile 8.67
    aniline 5.0
    1,3-propanediol 4.64
    bromobenzene 2.59
    dibromomethane 7.13
    1,1,2,2-tetrachloroethane 10.7
    2-methyl-cyclohexyl acetate 2.83
    tetrabutyl urea 6.05
    diisobutyl methanol 1.8
    2-phenylethanol 3.85
    styrene 2.31
    dioctyl adipate 3.85
    dimethyl sulfate 28.35
    ethyl butyrate 4.64
    methyl lactate 7.25
    butyl lactate 3.71
    diethyl carbonate 3.37
    propanediol butyl ether 4.43
    triethyl orthoformate 4.4
    p-tert-butyltoluene 2.91
    methyl 4-tert-butylbenzoate 8.54
    morpholine 21.07
    tert-butylamine 3.22
    n-dodecanol 2.0
    dimethoxymethane 38.62
    ethylene carbonate 4.55
    cyrene 6.57
    2-ethoxyethyl acetate 8.83
    2-ethylhexyl acetate 3.39
    1,2,4-trichlorobenzene 4.58
    4-methylpyridine 11.18
    dibutyl ether 4.35
    2,6-dimethyl-4-heptanol 1.8
    DEF 25.63
    dimethyl isosorbide 13.0
    tetrachloroethylene 9.73
    eugenol 7.92
    triacetin 6.96
    span 80 4.64
    1,4-butanediol 2.12
    1,1-dichloroethane 4.25
    2-methyl-1-pentanol 1.55
    methyl formate 20.0
    2-methyl-1-butanol 1.89
    n-decane 1.09
    butyronitrile 3.27
    3,7-dimethyl-1-octanol 2.24
    1-chlorooctane 2.37
    1-chlorotetradecane 1.16
    n-nonane 1.08
    undecane 0.83
    tert-butylcyclohexane 0.35
    cyclooctane 1.15
    cyclopentanol 3.88
    tetrahydropyran 8.78
    tert-amyl methyl ether 7.89
    2,5,8-trioxanonane 20.94
    1-hexene 1.28
    2-isopropoxyethanol 5.53
    2,2,2-trifluoroethanol 5.34
    methyl butyrate 5.03

    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