POTASSIUM PERSULPHATE

CAS Number 7727-21-1

synonyms:
POTASSIUM PERSULPHATE; persulfate de potassium ; Persulphate de potassium; potassium monopersulfate;potassium peroxodisulfate;potassium peroxydisulfate;potassium persulfate;POTASSIUM PERSULFATE;7727-21-1;Potassium peroxydisulfate;Anthion;Potassium peroxodisulfate;Potassium peroxydisulphate;Dipotassium peroxydisulfate;Dipotassium persulfate;Caswell No. 700;Dipotassium peroxodisulphate;UNII-6B86K0MCZC;Peroxydisulfuric acid, dipotassium salt;HSDB 2638;EINECS 231-781-8;UN1492;EPA Pesticide Chemical Code 063602;Potassium peroxydisulfate (K2(S2O8));dipotassium sulfonatooxy sulfate;Peroxydisulfuric acid (((HO)S(O)2)2O2) , dipotassium salt;Peroxydisulfuric acid (((HO)S(O)2)2O2), dipotassium salt;Peroxydisulfuric acid ([(HO)S(O)2]2O2), dipotassium salt;Peroxydisulfuric acid (((HO)S(O)2)2O2), potassium salt (1:2);Peroxydisulfuric acid ([(HO)S(O)2]2O2), potassium salt (1:2);Virkon S;Potassiumpersulfate;potassium persulphate;potassium perdisulfate;ACMC-20ajud;AC1LANLV;potassium monopersulphate;Potassium Persulfate ACS; DSSTox_CID_9690; dipotassiusulfonatoperoxy)sulfonyl]oxidanide; AC1L2NF2;AC1Q1TT3;6B86K0MCZC;DSSTox_RID_78809; DSSTox_GSID_29690; MolPort-006-109-725;U SHAGKDGDHPEEY-UHFFFAOYSA-L;dipotassium dioxidan-2-idesulfonate;Tox21_200798;Peroxydisulfuric acid dipotassium salt;AKOS015950646;RP29618;RTR-024699; TRA0024732; NCGC00258352-01;106015-10-5;persulfate de potassium; AN-21842;BP-13445; IN002298;I N018766;IN018767; S375 ;SC-74865;CAS-7727-21-1; AB1002930;LS-102479;Potassium persulfate [UN1492] [Oxidizer];TR-024699;FT-0689072;Potassium peroxydisulfate, low nitrogen, ACS;Potassium persulfate [UN1492] [Oxidizer];Potassium peroxydisulfate, ACS, 99.0% min. 250g;I14-100188;1001387-46-7;[(Sulfonatoperoxy)sulfonyl]oxydanide de dipotassium [French] [ACD/IUPAC Name];7727-21-1 [RN];Anthion;Dikalium-[(sulfonatoperoxy)sulfonyl]oxidanid [German] [ACD/IUPAC Name];Dikaliumperoxodisulfat [German];Dipotassiu[(sulfonatoperoxy)sulfonyl]oxidanide [ACD/IUPAC Name]; Dipotassium peroxodisulphate; Dipotassium peroxydisulfate; Dipotassium persulfate;Kaliumperoxodisulfat [German]; Perossidisolfato di potassio [Italian];Peroxydisulfuric acid dipotassium salt;PEROXYDISULFURIC ACID, DIPOTASSIUM SALT;persolfato di potassio [Italian];Persulfato de potasio [Spanish];Potassium perdisulfate;Potassium peroxodisulfate;POTASSIUM PEROXOSULFATE;Potassium peroxydisulfate;Potassium peroxydisulphate;Potassium peroxysulfate;Potassium persulfate [Wiki];potassium persulphate;[7727-21-1];231-781-8 [EINECS];Dipotassium dioxidan-2-idesulfonate [ACD/IUPAC Name];dipotassium O[(sulfonatoperoxy)sulfonyl]oxidanidolate ;dipotassium sulfato sulfate; dipotassium sulfonatooxy sulfate;dipotassium;sulfonatooxy sulfate;Di-Potassiumperoxodisulphate; EINECS 231-781-8; MFCD00011386 [MDL number]; Potassium persulfate (K2S2O8); Potassium Persulfate ACS;UNII:6B86K0MCZC;UNII-6B86K0MCZC;anthion;Virkon S;BETZ 2701;PERSULPHATE;NP A SOLUTION;SULPHATE STANDARD;Potassum Suphates;POTASSIUM SULPHATE;POTTASSIUM SULPHATE;POTASSIUM PERSULFATE;Potassium sulfate ;Sodium persulfate ;PHENYLSELENOL; COBALT ETHYLENE DIAMINE CHLORIDE BENZYL ISOCYANIDE ;1,1,3,3-TETRAMETHYLBUTYL ISOCYANIDE ;Potassium sorbate 2,2'-Dithiobis(benzothiazole) ;Potassium chloride ;Aluminum oxide ;Potassium POTASSIUM CYANIDE ;Potassium persulfate ;Potassium bromate Losartan potassium ;Potassium nitrate ;Potassium Acetate Dicumyl peroxide 7727-21-1 BioChemika ;Ultra Chelators Analytical Reagents Biochemicals and Reagents Analytical Chromatography Product Catalog BioChemical; DI-POTASSIUM PEROXODISULPHATE ;DIPOTASSIUM PEROXYDISULFATE BETZ 2701 TNP-201; DECOMPOSITION SOLUTION 1 Complexometric & Volumetric Solutions General Use Inorganic Salts Synthetic Reagents Sulfur-Based Titration Volumetric Solutions X-Ray Crystallography Proteomics and Protein Expression Puriss p.a. ACS Puriss p.a. Protein Analysis Oxidation Optimization Reagents anthion dipotassiumpersulfate peroxydisulfuricacid([(ho)s(o)2]2o2),dipotassiumsalt Peroxydisulfuricacid,dipotassiumsalt peroxydisulfuricacid[((ho)s(o)2)2o2],dipotassiumsalt potassiumperoxydisulfate(k2s2o3) potassiumperoxydisulfate[k2(s2o8)] NP A, SOLUTION POTASSIUM ;PEROXODISULFATE, POTASSIUM PEROXYDISULFATE POTASSIUM PEROXYDISULPHATE ;POTASSIUM PERSULFATE ;POTASSIUM PERSULFATE, PURIFIED POTASSIUM ;PERSULPHATE POTASSIUM SULPHATE; POTASSIUM SULFATE FERTILIZER POTASSIUM SULFATE TS ;PEROXYDISULFURIC ACID SULPHATE STANDARD SULFURIC ACID POTASSIUM SALT SULFATE STANDARD STOCK SOL Peroxydisulphuric acid dipotassium salt~Potassium peroxydisulphate Potassium persulfate 99+ % for analysis ;POTTASSIUM SULPHATE Potassium Persulfate Potassium peroxydisulfate Dipotassium peroxydisulphate POTASSIUM PERSULFATE SIGMAULTRA POTASSIUM PEROXODISULFATE (MAX. 0,001 % N) R. G., REAG. ACS POTASSIUM PEROXODISULFATE EXTRA PURE POTASSIUM PERSULFATE ELECTROPHORESIS*REA GENT ;POTASSIUM PEROXODISULFATE R. G. POTASSIUM PERSULFATE, 99+%, A.C.S. REAGE NT ;POTASSIUM PERSULFATE PHOTOGRAPHIC GRADE POTASSIUM PERSULFATE ACS REAGENT;DIPOTASSIUM PEROXODISULPHATE; DIPOTASSIUM SALT PEROXYDISULFURIC ACID; PEROXYDISULFURIC ACID ( [ (HO) S (O) 2] 2O2) , DIPOTASSIUM SALT; PEROXYDISULFURIC ACID, DIPOTASSIUM SALT; ANTHION; DIPOTASSIUM PERSULFATE; POTASSIUM PEROXYDISULFATE; POTASSIUM PEROXYDISULPHATE;Potassium peroxodisulfate; Anthion; Dipotassium persulfate;Potassium persulfate;dipotassium [(sulfonatoperoxy)sulfonyl]oxidanide;dipotassium peroxodisulfate;dipotassium peroxodisulphate;dipotassium peroxydisulfate;dipotassium persulfate;dipotassium sulfonatooxy sulfate;peroxydisulfuric acid (((HO)S(O)2)2O2) dipotassium salt;peroxydisulfuric acid (((HO)S(O)2)2O2), potassium salt (1:2);peroxydisulfuric acid ([(HO)S(O)2]2O2), dipotassium salt;peroxydisulfuric acid potassium salt (1:2);peroxydisulfuric acid, dipotassium salt;potassium peroxodisulfate;potassium peroxydisulfate;potassium peroxydisulfate (K2(S2O8));potassium peroxydisulphate;ANTHION;DIPOTASSIUM PEROXODISULFATE;DIPOTASSIUM PEROXYDISULFATE;DIPOTASSIUM PERSULFATE;POTASSIUM PEROXYDISULFATE;POTASSIUM PEROXYDISULFATE (K2(S2O8));POTASSIUM PEROXYDISULFATE (K2S2O3);POTASSIUM PEROXYDISULPHATE;POTASSIUM PERSULFATE;POTASSIUM PERSULPHATE;VIRKON S;Anthion; Peroxydisulfuric acid, dipotassium salt; Potassium peroxydisulfate; Dipotassium peroxodisulfate;Potassium Peroxydisulfate, Dipotassium;Peroxydisulfate;Potassium Peroxydisulfate;Dipotassium disulfate; Potassium peroxodisulfate; Dipotassium [(sulfonatoperoxy)sulfonyl]oxidanide; Dipotassium peroxodisulphate; dipotassium sulfonatooxy sulfate;Peroxydisulfuric acid (((HO)S(O)2)2O2), dipotassium salt; Peroxydisulfuric acid dipotassium salt;Anthion;Dipotassium [(sulfonatoperoxy)sulfonyl]oxidanide;Dipotassium peroxodisulphate;Dipotassium peroxydisulfate;Dipotassium persulfate;Peroxydisulfuric acid (((HO)S(O)2)2O2) , dipotassium salt;Peroxydisulfuric acid (((HO)S(O)2)2O2), dipotassium salt;Peroxydisulfuric acid, dipotassium salt    biospider;Peroxydisulfuric(VI) acid, dipotassium salt, 8CI;Potassium peroxodisulfate;K2-O8-S2, K2S2O8, POTASSIUM PEROXYDISULPHATE, POTASSIUM PERSULFATE, POTASSIUM PERSULFATE POWDER PILLOWS,Potassium Persulfate Powder Pillows, Potassium Persulfate, 5%, Potassium dihydrogen phosphate, Potassium peroxodisulfate, Potassium peroxydisulfate, Potassium persulfate, Potassium persulfate, powder and pieces, anthion, dipotassium peroxodisulfate, dipotassium peroxydisulfite, dipotassium persulfate, dipotassium persulphate, peroxodisulphate, peroxydisulfuric acid, dipotassium salt, peroxydisulphuric acid, dipotassium salt, potassium peroxydisulfate, potassium peroxydisulphate; Anthion;Caswell No. 700;Dipotassium [(sulfonatoperoxy)sulfonyl]oxidanide(IUPAC); Dipotassium peroxodisulphate; Dipotassium peroxydisulfate;Dipotassium persulfate;E 922;EINECS:231-781-8;Peroxydisulfuric acid dipotassium salt;Peroxydisulfuric acid, dipotassium salt;Potassium peroxodisulfate;Potassium peroxydisulphate;Potassium peroxysulfate;Potassium persulfate [Wiki];dipotassium;sulfonatooxy sulfate(IUPAC);potassium perdisulfate;potassium peroxydisulfate;potassium peroxydisulphate, potassium persulphate, potassium peroxydisulfate. potasyum per sülfat ; Potassium Persulfate; persulphate de potassium; CAS Number: 7727-21-1;  EC Number: 231-781-8; Peroxodisulfate de dipotassium; Peroksodisulfate de dipotassium; Peroxodisulfate de dipotasyum; persulfate de potassium

Potassium persulfate

Not to be confused with Potassium peroxymonosulfate.
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 check
3D model (JSmol)    
Interactive image
ChemSpider    
22821 ☒
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 check
UN number    1492
CompTox Dashboard (EPA)    
DTXSID4029690 Edit this at Wikidata
InChI[show]
SMILES[show]
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
Safety data sheet    ICSC 1133
GHS pictograms    GHS03: Oxidizing GHS07: Harmful GHS08: Health hazard
GHS Signal word    Danger
GHS hazard statements    H272, H302, H315, H317, H319, H334, H335, H371
GHS precautionary statements    P220, P261, P280, P305+351+338, P342+311
NFPA 704 (fire diamond)    
NFPA 704 four-colored diamond
021OX
Flash point    Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)    802 mg/kg (oral, rat)[2]
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).
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Infobox references
Potassium persulfate is the inorganic compound with the formula K2S2O8. Also known as potassium peroxydisulfate or KPS, 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.

Preparation
Potassium persulfate can be prepared by electrolysis of a cold solution potassium bisulfate in sulfuric acid at a high current density.[1]

2 KHSO4 → K2S2O8 + H2
It can also be prepared by adding potassium bisulfate (KHSO4) to a solution of the more soluble salt ammonium peroxydisulfate (NH4)2S2O8. In principle it can be prepared by chemical oxidation of potassium sulfate using fluorine.

Uses
This salt is used to initiate polymerization of various alkenes leading to commercially important polymers such as styrene-butadiene rubber and polytetrafluoroethylene and related materials. In solution, the dianion dissociates to give radicals:[3]

[O3SO-OSO3]2− ⇌ 2 [SO4]•−
It is used in organic chemistry as an oxidizing agent,[4] for instance in the Elbs persulfate oxidation of phenols and the Boyland–Sims oxidation of anilines.

As a strong yet stable bleaching agent it also finds use in various hair bleaches and lighteners. Such brief and non-continuous use is normally hazard free, however prolonged contact can cause skin irritation.[5] It has been used as an improving agent for flour with the E number E922, although it is no longer approved for this use within the EU.

Precautions
The salt is a strong oxidant and is incompatible with organic compounds. Prolonged skin contact can result in irritation.

Potassium persulfate appears as a white crystalline solid. Specific gravity 2.477. Decomposes below 100°C.

CAMEO Chemicals

Outline
Potassium persulfate (Formula is K2S2O8) is also known as potassium peroxydisulfate, molecular weight is 270.32, decomposition temperature is 50-60℃, it is white, odorless crystal, it is soluble in water, insoluble in alcohol, it has strong oxidizing, it is commonly used as bleaching agents, oxidizing agents, it can be used as the polymerization initiator, it almost does not absorb moisture, it has good stability at room temperature, it is easy to be stored, and it has the advantages of convenience and safety, etc. . Applications involves polymerization initiator, circuit board cleaning and etching, copper and aluminum surface activation, modified starch, pulp and textile bleaching and desizing low temperature, circulating water purification treatment systems, oxidative degradation of harmful gases, low formaldehyde adhesive stick together accelerated oxidation of ethanol and aromatic hydrocarbons, disinfectants, hair dye decolorization.

Recrystallization
Potassium persulfate dissolves in 30℃ water, cools, then the recrystallized product can be obtained, it is filtered and dried under reduced pressure in the presence of calcium chloride.
Solubility in water(g/100ml)
Grams which dissolves in per 100 ml of water: 4.7g/20 ℃.
The main application areas
Potassium persulfate is mainly used as initiator and strong oxidizing agents.
Initiator:
Potassium persulfate is the initiator of latex or solution polymerization of acrylic monomers, vinyl acetate, vinyl chloride and other product, and it is also the initiator of styrene, acrylonitrile, butadiene and the like emulsion for copolymerisation.
Strong oxidizing agent:
1. It is used as desizing agent and bleach activator.
2. It is used for oxidative degradation of harmful substances in pool and closed circular loop in water.
3. It can be applied in the production of starch modifier and applied in the production of adhesive and coating agent.
4. It can be applied in the branched-chain oxidation, alcohol and aromatic hydroxy oxidation.
5. It is one of the basic constituent of hair dyes, it plays the role of decolorization.
Toxicity
The amount is not specified (FAO/WHO, 2001).
Potassium persulfate powder has stimulating effect on nasal mucosa, packaging should be ventilated to prevent dust. Labour protection appliance should be dressed at work.
Storage precautions
Potassium persulfate is non-flammable, it is combustion-supporting which due to it can release of oxygen, storage environment must be dry and clean, well-ventilated. Pay attention to moisture and rain, it should not be transported in rain. Keep away from fire, heat and direct sunlight. It should be kept sealed packaging, labels should be intact and clear. It should be stored separately with flammable or combustible materials, organic compounds, as well as rust, small amount of metal, and other reducing substance, it should avoid mix to prevent causing decomposition of potassium persulfate and explosion.
Chemical properties
It is colorless or white triclinic crystalline powder. It is soluble in water, the solubility is 1.75g/100ml water at 0℃, the solubility is 5.3g/100ml water at 20℃. It is insoluble in alcohol. Queous solution is acidic.
Uses
It can be used as gluten agent of wheat flour.
It is mainly used as a disinfectant and fabric bleach. It can be used as industrial oxidant in dyes and inorganic salts. It can be used as emulsion polymerization initiators in synthetic rubber industry. It can be used as polymerization accelerator in synthetic resin. In addition, it can also be used in the steel, photographic industry and medicine.
It can be used as analytical reagents, oxidants and plastic initiator, it can also be used in the film photofinishing
Production method
Potassium sulfate method
Ammonium sulfate and sulfuric acid formulates to form liquid electrolyte, it is decontaminated by electrolysis, HSO4-can discharge and generate peroxydisulfate acidat in the anode, and then reacts with ammonium sulfate to generate ammonium persulfate, Then replacement reaction can happen when potassium is added . The finished product of potassium persulfate can be obtained after cooling, separation, crystallization, drying.
Category
oxidant
Toxicity grading
Mid toxicity.
Physical properties
Colorless or white crystals; triclinic structure; density 2.477 g/cm3; stable in solid crystalline form; decomposes on heating, evolving oxygen; completely decomposes at about 100°C; sparingly soluble in cold water 1.75 g/100mL at 0°C; moderately soluble at ordinary temperature, 5.29 g/100 mL at 20°C;aqueous solution acidic and unstable, decomposing slowly at room temperature and more rapidly when the solution is warmed; insoluble in alcohol.
Uses
Bleaching fabrics, soaps; in photography under the name Anthion to remove last traces of thiosulfate from plates and paper; in analytical chemistry.

Molecular weight of Potassium Persulphate: 270.33 g / mol calculated by PubChem 2.1 (PubChem release 2019.06.18)
Number of potassium persulphate hydrogen bond donors: 0 calculated by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Number of potassium persulphate hydrogen bond acceptors: 8 calculated by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Number of Potassium Persulphate rotating bonds: 1 calculated by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Exact mass of Potassium Persulphate: 269.830872 g / mol calculated by PubChem 2.1 (PubChem release 2019.06.18)
Monoisotopic mass of Potassium Persulphate: 269.830872 g / mol calculated by PubChem 2.1 (PubChem release 2019.06.18)
Topological polar surface of Potassium Persulphate: 150 Ų calculated by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Number of heavy atoms of potassium persulphate: 12 calculated by PubChem
Formal load of Potassium Persulphate: 0 calculated by PubChem
Complexity of Potassium Persulphate: 206 calculated by Cactvs 3.4.6.11 (PubChem version 2019.06.18)
Potassium Persulphate isotopic number of atoms: 0 calculated by PubChem
Defined number of atomic stereocenters of Potassium Persulphate: 0 calculated by PubChem
Number of undefined atomic stereocenters of Potassium Persulphate: 0 calculated by PubChem
Defined number of Potassium Persulphate bond stereocenters: 0 calculated by PubChem
Potassium Persulphate undefined binding stereocenter number: 0 calculated by PubChem
Number of covalently bound units of Potassium Persulphate: 3 calculated by PubChem
The compound is canonized from Potassium Persulphate: Yes

Related Categories    C-H Activation, Catalysis and Inorganic Chemistry, Chemical Synthesis, Essential Chemicals, Free Radical Initiators,
Inorganic Peroxides, Materials Science, Oxidants, Oxidizing Agents, Polymer Science, Polymerization Initiators, Potassium Salts, Reagents for Polymerization, Research Essentials, Salts, Sulfur-Based, Synthetic Reagents
Less...
Quality Level      200
grade      ACS reagent
vapor density      9.3 (vs air)
vapor pressure      <0.1 hPa ( 25 °C)
assay      ≥99.0%
form      powder or crystals
reaction suitability      reagent type: catalyst
reaction type: C-H Activation

The main areas of application of potassium persulphate
Potassium persulphate is mainly used as an initiator and as strong oxidizing agents.
Initiator:
Potassium persulphate is the initiator of latex or solution polymerization of acrylic monomers, vinyl acetate, vinyl chloride and other products, and it is also the initiator of styrene, acrylonitrile, of butadiene and a similar emulsion for the copolymerization.
Strong oxidizing agent:
 Potassium persulphate is used as a desizing agent and bleach activator.
 Potassium persulphate is used for oxidative degradation of harmful substances in swimming pool and closed circular loop in water.
 Potassium persulphate can be applied in the production of starch modifier and applied in the production of adhesive and coating agent.
 Potassium persulphate can be applied in branched chain oxidation, alcohol and aromatic hydroxy oxidation.
 Potassium persulphate is one of the basic constituents of hair dyes, it plays the role of discoloration.