Supplier Related Products Identification Chemical Properties Safety Data Raw materials And Preparation Products Hazard Information Material Safety Data Sheet(MSDS) Questions And Answer Spectrum Detail Well-known Reagent Company Product Information
WebSite >  CAS DataBase List  > 7727-21-1

7727-21-1

Supplier Related Products Identification Chemical Properties Safety Data Raw materials And Preparation Products Hazard Information Material Safety Data Sheet(MSDS) Questions And Answer Spectrum Detail Well-known Reagent Company Product Information

Product Image

Identification

Name
Potassium persulfate
CAS
7727-21-1
Synonyms
BETZ 2701
DI-POTASSIUM PEROXODISULPHATE
DIPOTASSIUM PEROXYDISULFATE
NP A SOLUTION
PEROXYDISULFURIC ACID
POTASSIUM PEROXODISULFATE
POTASSIUM PEROXYDISULFATE
POTASSIUM PEROXYDISULPHATE
POTASSIUM PERSULFATE
POTASSIUM PERSULFATE, PURIFIED
POTASSIUM PERSULPHATE
POTASSIUM SULFATE
POTASSIUM SULFATE FERTILIZER
POTASSIUM SULFATE TS
POTASSIUM SULPHATE
SULFATE STANDARD STOCK SOL
SULFURIC ACID POTASSIUM SALT
SULPHATE STANDARD
TNP-201 DECOMPOSITION SOLUTION 1
anthion
EINECS(EC#)
231-781-8
Molecular Formula
K2O8S2
MDL Number
MFCD03457781
Molecular Weight
270.32
MOL File
7727-21-1.mol

Chemical Properties

Appearance
colourless odourless crystals or white powder
Appearance
Potassium persulfate is a colorless or white, odorless crystalline material.
mp 
1067 °C
bp 
1689 °C
density 
2.47
vapor density 
9.3 (vs air)

solubility 
H2O: 0.5 M at 20 °C, clear, colorless

Stability:
Stable. Strong oxidizer. Incompatible with strong reducing agents, organic materials, combustible materials.
Water Solubility 
5 g/100 mL (20 ºC)
Merck 
14,7656
CAS DataBase Reference
7727-21-1(CAS DataBase Reference)
EPA Substance Registry System
7727-21-1(EPA Substance)

Safety Data

Hazard Codes 
O,Xn
Risk Statements 
R8:Contact with combustible material may cause fire.
R22:Harmful if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin .
R42/43:May cause sensitization by inhalation and skin contact .
Safety Statements 
S22:Do not breathe dust .
S24:Avoid contact with skin .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S37:Wear suitable gloves .
RIDADR 
UN 1492 5.1/PG 3

WGK Germany 
1

RTECS 
TT5900000

HazardClass 
5.1
PackingGroup 
III
HS Code 
28334000
Safety Profile
Moderately toxic by ingestion. An irritant and allergen. A powerful oxidtzer. Flammable when exposed to heat or by chemical reaction. Can react with reducing materials. It liberates oxygen above 100' when dry or @ about 50' when in solution. When heated to decomposition it emits highly toxic fumes of SOx,, S2O8, and K2O.
Hazardous Substances Data
7727-21-1(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

General Description
A white crystalline solid. Specific gravity 2.477. Decomposes below 100°C.
Reactivity Profile
POTASSIUM PERSULFATE(7727-21-1) is an oxidizing agent. Noncombustible but accelerates the burning of combustible material. POTASSIUM PERSULFATE(7727-21-1) 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].
Air & Water Reactions
Water soluble. Slowly decomposed by water. The salt rapidly liberates oxygen when heated, and especially so when wet.
Hazard
Strong irritant and oxidizing agent. Fire risk in contact with organic materials.
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.
Potential Exposure
Potassium persulfate is used as a bleaching and oxidizing agent; it is used in redox polymeri- zation catalysts; in the defiberizing of wet strength paper and in the desizing of textiles. Soluble in water.
First aid
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, includ- ing resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medi- cal attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Medical observation is recommended for 24?48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy.
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.
Shipping
UN1492 Potassium persulfate, Hazard Class: 5.1; Labels: 5.1-Oxidizer.
Incompatibilities
A strong oxidizer. Incompatible with combustible, organic or other readily oxidizable materials; sulfur, metallic dusts, such as aluminum dust; chlorates and perchlorates. Attacks chemically active metals. Keep away from moisture.
Waste Disposal
Use large volumes of reducing agents (bisulfites, e.g.). Neutralize with soda ash and drain into sewer with abundant water.

Material Safety Data Sheet(MSDS)

Questions And Answer

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

Spectrum Detail

Well-known Reagent Company Product Information

SupplierMore