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best price for high quaility potassium persulfate 99%min
Cas No: 7727-21-1
USD $ 1700.0-1700.0 / Metric Ton 20 Metric Ton 800-1000 Metric Ton/Month Xiamen Sinchem Imp.&Exp. Co.,Ltd. Contact Supplier
High purity Potassium persulfate with high quality and best price cas:7727-21-1
Cas No: 7727-21-1
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Potassium persulfate CAS: 7727-21-1
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7727-21-1 K2O8S2 Potassium persulfate
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7727-21-1 Usage


80℃-1.5 hours; 70℃-7.7 hours; 60℃-33 hours; 45℃-292 hours; 35℃-1600 hours.

Toxicity grading

Mid toxicity.


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.
The above information is edited by the chemicalbook of Wang Xiaodong.

Flammability hazard characteristic

Thermal decomposition can get oxygen; toxic fumes of nitrogen oxides can generate after combustion.

The main application areas

Potassium persulfate is mainly used as initiator and strong oxidizing agents.
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.

Solubility in water(g/100ml)

Grams which dissolves in per 100 ml of water: 4.7g/20 ℃.

Reactivity Profile

Potassium persulfate is an oxidizing agent. Noncombustible but accelerates the burning of combustible material. Potassium persulfate plus a little potassium hydroxide and water released sufficient heat and oxygen to ignite a polythene (polyethylene) liner in a container. [MCA Case History 1155. 1955].


Bleaching fabrics, soaps; in photography under the name Anthion to remove last traces of thiosulfate from plates and paper; in analytical chemistry.


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.


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.
The above information is edited by the chemicalbook of Wang Xiaodong.

Professional standards

TWA 2 mg/m.

Chemical Properties

colourless odourless crystals or white powder


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 characteristics

Treasury should have ventilation and be low-temperature drying; loading and unloading should be light; it should be stored separately with organic matter, reducing agents, sulfur, phosphorus combustibles.

Explosive hazardous characteristics

It can explode when mixes with reductant, sulfur, phosphorus; It can explode when be heated, impacted, and meets fire.



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.

Fire Hazard

These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.

Acute toxicity

Oral-rat LD50: 802 mg/kg.

Purification Methods

Crystallise the persulfate twice from distilled water (10mL/g) and dry it at 50o in a vacuum desiccator. Its solubility in H2O is 1.6% at 0o, 4.5% at 20o, and 7.2% at 30o. An aqueous solution decomposes on long standing with evolution of O2 and formation of KHSO4. It is a powerful oxidising agent. Store it at ~10o. [Fehér in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 390 1963.]

Air & Water Reactions

Water soluble. Slowly decomposed by water. The salt rapidly liberates oxygen when heated, and especially so when wet.

Health Hazard

Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or death. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause pollution.

Extinguishing agent

Mist of water, sand, foam.

General Description

A white crystalline solid. Specific gravity 2.477. Decomposes below 100°C.

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.

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.
Anode reaction: 2HSO4-2e → H2S2O8
Cathodic reaction: 2H ++ 2e → H2 ↑
(NH4) 2SO4 + H2S2O8 → (NH4) 2S2O8 + H2SO4
(NH4) 2S2O8 + K2SO4 + H2SO4 → K2S2O8 + 2NH4HSO4
It can be derived by replacement reaction with ammonium persulfate potassium sulfate, then it goes through cooling, separation, crystallization, drying.

7727-21-1 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Aldrich (379824)  Potassiumpersulfate  99.99% trace metals basis 7727-21-1 379824-25G 2,150.46CNY Detail
Aldrich (379824)  Potassiumpersulfate  99.99% trace metals basis 7727-21-1 379824-5G 482.04CNY Detail
Sigma-Aldrich (216224)  Potassiumpersulfate  ACS reagent, ≥99.0% 7727-21-1 216224-500G 888.03CNY Detail
Sigma-Aldrich (216224)  Potassiumpersulfate  ACS reagent, ≥99.0% 7727-21-1 216224-100G 492.57CNY Detail
Sigma-Aldrich (216224)  Potassiumpersulfate  ACS reagent, ≥99.0% 7727-21-1 216224-5G 351.00CNY Detail
Alfa Aesar (A15310)  Potassium peroxydisulfate, 97%    7727-21-1 2500g 2135.0CNY Detail
Alfa Aesar (A15310)  Potassium peroxydisulfate, 97%    7727-21-1 500g 503.0CNY Detail
Alfa Aesar (A15310)  Potassium peroxydisulfate, 97%    7727-21-1 100g 194.0CNY Detail
Alfa Aesar (46939)  Potassium peroxydisulfate, low nitrogen, ACS, 99.0% min    7727-21-1 1kg 2069.0CNY Detail
Alfa Aesar (46939)  Potassium peroxydisulfate, low nitrogen, ACS, 99.0% min    7727-21-1 250g 690.0CNY Detail
Alfa Aesar (18227)  Potassium peroxydisulfate, 99.99% (metals basis)    7727-21-1 100g 1195.0CNY Detail
Alfa Aesar (18227)  Potassium peroxydisulfate, 99.99% (metals basis)    7727-21-1 25g 667.0CNY Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017


1.1 GHS Product identifier

Product name Potassium persulfate

1.2 Other means of identification

Product number -
Other names dipotassium,sulfonatooxy sulfate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Food Additives: FLOUR_TREATMENT_AGENT
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:7727-21-1 SDS

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