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Potassium persulfate

Outline Half-life Recrystallization Solubility in water(g/100ml) The main application areas Toxicity Storage precautions Chemical properties Uses Production method Category Toxicity grading Acute toxicity Explosive hazardous characteristics Flammability hazard characteristic Storage characteristics Extinguishing agent Professional standards
Potassium persulfate
Potassium persulfate
CAS No.
7727-21-1
Chemical Name:
Potassium persulfate
Synonyms
anthion;Virkon S;BETZ 2701;PERSULPHATE;NP A SOLUTION;SULPHATE STANDARD;Potassum Suphates;POTASSIUM SULPHATE;POTTASSIUM SULPHATE;POTASSIUM PERSULFATE
CBNumber:
CB6854294
Molecular Formula:
K2O8S2
Formula Weight:
270.32
MOL File:
7727-21-1.mol

Potassium persulfate Properties

Melting point:
1067 °C
Boiling point:
1689 °C
Density 
2.47
vapor density 
9.3 (vs air)
storage temp. 
Store at +5°C to +30°C.
solubility 
H2O: 0.5 M at 20 °C, clear, colorless
form 
Solid
color 
White
PH
3.2 (50g/l, H2O, 20℃)
Water Solubility 
5 g/100 mL (20 ºC)
Merck 
14,7656
Stability:
Stable. Strong oxidizer. Incompatible with strong reducing agents, organic materials, combustible materials.
CAS DataBase Reference
7727-21-1(CAS DataBase Reference)
EPA Substance Registry System
Peroxydisulfuric acid ([(HO)S(O)2]2O2), dipotassium salt(7727-21-1)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  O,Xn
Risk Statements  8-22-36/37/38-42/43
Safety Statements  22-24-26-37
RIDADR  UN 1492 5.1/PG 3
WGK Germany  1
RTECS  TT5900000
TSCA  Yes
HazardClass  5.1
PackingGroup  III
Hazardous Substances Data 7727-21-1(Hazardous Substances Data)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H272 May intensify fire; oxidizer Oxidising liquids;Oxidising solids Category 2
Category 3
Danger
Warning
P210, P220, P221P280, P370+P378,P501
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P220 Keep/Store away from clothing/…/combustible materials.
P221 Take any precaution to avoid mixing with combustibles/…
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P284 Wear respiratory protection.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P342+P311 IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician.
P405 Store locked up.

Potassium persulfate price More Price(21)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1.05091 Potassium peroxodisulfate 7727-21-1 1EA $27.25 2017-11-08 Buy
Sigma-Aldrich 1.05091 Potassium peroxodisulfate 7727-21-1 2EA $68.5 2017-11-08 Buy
Alfa Aesar 013145 Potassium peroxydisulfate, ACS, 99.0% min 7727-21-1 1kg $105 2018-11-16 Buy
Alfa Aesar 013145 Potassium peroxydisulfate, ACS, 99.0% min 7727-21-1 250g $40.1 2018-11-16 Buy
Sigma-Aldrich 216224 Potassium persulfate ACS reagent, ≥99.0% 7727-21-1 100g $45 2018-11-13 Buy

Potassium persulfate Chemical Properties,Uses,Production

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

Half-life

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

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

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.

Category

oxidant

Toxicity grading

Mid toxicity.

Acute toxicity

Oral-rat LD50: 802 mg/kg.

Explosive hazardous characteristics

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

Chemical Properties

colourless odourless crystals or white powder

Flammability hazard characteristic

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

Uses

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

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.

Extinguishing agent

Mist of water, sand, foam.

Professional standards

TWA 2 mg/m.

General Description

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

Air & Water Reactions

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

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].

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.

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.

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.]

Potassium persulfate Preparation Products And Raw materials

Raw materials

Preparation Products


Potassium persulfate Suppliers

Global( 217)Suppliers
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Henan DaKen Chemical CO.,LTD.
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0371-55170693
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Mainchem Co., Ltd.
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Hefei TNJ Chemical Industry Co.,Ltd.
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Alfa Aesar 400-610-6006; 021-67582000
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Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
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J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
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