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Potassium persulfate information


Potassium persulfate
Two potassium cations and one peroxydisulfate anion
Ball-and-stick model of the crystal structure
Potassium persulfate as a white powder
Names
Other names
  • potassium peroxydisulfate
  • Anthion
  • potassium perdisulfate
Identifiers
CAS Number
  • 7727-21-1 checkY
3D model (JSmol)
  • Interactive image
ChemSpider
  • 22821 ☒N
ECHA InfoCard 100.028.893 Edit this at Wikidata
EC Number
  • 231-781-8
E number E922 (glazing agents, ...)
PubChem CID
  • 24412
RTECS number
  • SE0400000
UNII
  • 6B86K0MCZC checkY
UN number 1492
CompTox Dashboard (EPA)
  • DTXSID4029690 Edit this at Wikidata
InChI
  • InChI=1S/2K.H2O8S2/c;;1-9(2,3)7-8-10(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2 ☒N
    Key: USHAGKDGDHPEEY-UHFFFAOYSA-L ☒N
  • InChI=1/2K.H2O8S2/c;;1-9(2,3)7-8-10(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2
    Key: USHAGKDGDHPEEY-NUQVWONBAA
SMILES
  • [O-]S(=O)(=O)OOS(=O)(=O)[O-].[K+].[K+]
Properties
Chemical formula
K2S2O8
Molar mass 270.322 g/mol
Appearance white powder
Odor odorless
Density 2.477 g/cm3[1]
Melting point < 100 °C (212 °F; 373 K) (decomposes)
Solubility in water
1.75 g/100 mL (0 °C)
4.49 g/100 mL (20 °C)
Solubility insoluble in alcohol
Refractive index (nD)
1.467
Structure
Crystal structure
triclinic
Hazards
GHS labelling:
Pictograms
GHS03: Oxidizing GHS07: Exclamation mark GHS08: Health hazard
Signal word
Danger
Hazard statements
H272, H302, H315, H317, H319, H334, H335, H371
Precautionary statements
P220, P261, P280, P305+P351+P338, P342+P311
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
2
0
1
OX
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)
802 mg/kg (oral, rat)[2]
Safety data sheet (SDS) ICSC 1133
Related compounds
Other anions
Potassium sulfite
Potassium sulfate
Potassium peroxymonosulfate
Other cations
Sodium persulfate
Ammonium persulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Infobox references

Potassium persulfate is the inorganic compound with the formula K2S2O8. Also known as potassium peroxydisulfate, it is a white solid that is sparingly soluble in cold water, but dissolves better in warm water. This salt is a powerful oxidant, commonly used to initiate polymerizations.

  1. ^ Cite error: The named reference Georg was invoked but never defined (see the help page).
  2. ^ Chambers, Michael. "ChemIDplus - 7727-21-1 - USHAGKDGDHPEEY-UHFFFAOYSA-L - Potassium persulfate". chem.nlm.nih.gov.

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Potassium persulfate

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Potassium persulfate is the inorganic compound with the formula K2S2O8. Also known as potassium peroxydisulfate, it is a white solid that is sparingly...

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Ammonium persulfate

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Ammonium persulfate (APS) is the inorganic compound with the formula (NH4)2S2O8. It is a colourless (white) salt that is highly soluble in water, much...

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Persulfate

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peroxomonosulfate, Na2SO5 Potassium peroxymonosulfate, KHSO5 Sodium persulfate (sodium peroxydisulfate), Na2S2O8 Ammonium persulfate (ammonium peroxydisulfate)...

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Iodine clock reaction

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form a complex with the starch. Potassium persulfate is less soluble (cfr. Salters website) while ammonium persulfate has a higher solubility and is used...

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Potassium bisulfate

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as a precursor to prepare potassium persulfate, a powerful oxidizing agent. Mercallite, the mineralogical form of potassium bisulfate, occurs very rarely...

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Sodium persulfate

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Sodium persulfate is the inorganic compound with the formula Na2S2O8. It is the sodium salt of peroxydisulfuric acid, H2S2O8, an oxidizing agent. It is...

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Potassium sulfate

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Potassium sulfate (US) or potassium sulphate (UK), also called sulphate of potash (SOP), arcanite, or archaically potash of sulfur, is the inorganic compound...

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Peroxydisulfate

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annually. Important salts include sodium persulfate (Na2S2O8), potassium persulfate (K2S2O8), and ammonium persulfate ((NH4)2S2O8). These salts are colourless...

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Elbs persulfate oxidation

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The Elbs persulfate oxidation is the organic reaction of phenols with alkaline potassium persulfate to form para-diphenols. The reaction is generally performed...

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Acetone peroxide

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both peroxides. Baeyer and Villiger prepared the dimer by combining potassium persulfate in diethyl ether with acetone, under cooling. After separating the...

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Formula unit

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but it is not always the case. For example, the ionic compounds potassium persulfate (K2S2O8), mercury(I) nitrate Hg2(NO3)2, and sodium peroxide Na2O2...

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Bleach

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and white Kraft paper. Potassium persulfate (K2 S2O8) and other persulfate salts. It, alongside ammonium and sodium persulfate, is common in hair-lightening...

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Peroxydisulfuric acid

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acid is a precursor to several salts including sodium peroxydisulfate, potassium peroxydisulfate, and ammonium peroxydisulfate. These salts are used to...

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Polyacrylic acid

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steps: Initiation: Free radicals are generated by initiators such as potassium persulfate (K2S2O8) or Azobisisobutyronitrile (AIBN). These radicals are highly...

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Nitrile

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primary amines via oxidation. Common methods include the use of potassium persulfate, Trichloroisocyanuric acid, or anodic electrosynthesis. α-Amino acids...

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Potassium peroxymonosulfate

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Potassium peroxymonosulfate is widely used as an oxidizing agent, for example, in pools and spas (usually referred to as monopersulfate or "MPS"). It...

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Neoprene

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radical emulsion polymerization. Polymerization is initiated using potassium persulfate. Bifunctional nucleophiles, metal oxides (e.g. zinc oxide), and thioureas...

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Bactericide

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dioxide, etc.), active oxygen (peroxides, such as peracetic acid, potassium persulfate, sodium perborate, sodium percarbonate, and urea perhydrate), iodine...

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E number

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; Takahashi, M.; Hayashi, Y. (1990). "Toxicity and carcinogenicity of potassium bromate–a new renal carcinogen". Environmental Health Perspectives. 87:...

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Nitrene

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In one study a nitrene, formed by oxidation of a carbamate with potassium persulfate, gives an insertion reaction into the palladium to nitrogen bond...

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Methanesulfonic acid

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methane and oleum at around 50 °C and 100 bar in the presence of a potassium persulfate initiator. This technology was acquired and commercialized by BASF...

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In situ chemical oxidation

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are permanganate (both sodium permanganate and potassium permanganate), Fenton's Reagent, persulfate, and ozone. Other oxidants can be used, but these...

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Curium

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curium(IV) is only known in the presence of strong oxidizers such as potassium persulfate, and is easily reduced to curium(III) by radiolysis and even by water...

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Solubility table

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3 Potassium periodate KIO4 0.17 0.28 0.42 0.65 1 2.1 4.4 5.9 Potassium permanganate KMnO4 2.83 4.31 6.34 9.03 12.6 16.9 22.1 Potassium persulfate K2S2O8...

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Sulfite

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3 bisulfite ion S2O2− 5 metabisulfite ion H2SO3 sulfurous acid SO2− 5 persulfate ion SO2− 4 sulfate ion SO2− 2 hyposulfite ion S2O2− 3 thiosulfate ion...

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Salter Science

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Cobalt Chloride Potassium Iodide Soluble Starch Potassium Iodate Sodium Metabisulfite Carbon Rods Sodium Silicate Potassium Persulfate Potassium Chromate Zinc...

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List of CAS numbers by chemical compound

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7778–80–5 K2S2O5 potassium metabisulfite 16731–55–8 K2S2O7 potassium pyrosulfate 7790–62–7 K2S2O8 potassium persulfate 7727–21–1 K2Se potassium selenide 1312–74–9...

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Glossary of chemical formulae

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10294-66-3 K2S2O5 potassium metabisulfite 16731-55-8 K2S2O8 potassium persulfate 7727-21-1 K2SO3 potassium sulfite 16731-55-8 K2SO4 potassium sulfate 7778-80-5...

Word Count : 107

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