Potassium persulfate is an inorganic compound with chemical formula KtwoStwoOeightIt is a white crystalline powder, soluble in water and insoluble in ethanol, with strong oxidizing property. It is commonly used as bleaching agent, oxidant, and also as polymerization initiator. It is almost non hygroscopic, stable at room temperature, easy to store, convenient and safe.
Solubility: soluble in water, slower than ammonium persulfate, acidic aqueous solution, insoluble in ethanol
chemical property
crystal structure
During heating, oxygen is liberated and becomesPotassium pyrosulfateAnd completely decomposed at 100 ℃.It also decomposes in humid air.The influence of temperature and pH value on the decomposition speed. The higher the temperature is, the smaller the influence of pH value on the decomposition speed is. The presence of emulsifier and mercaptan can accelerate the decomposition.In alkaline solution, it can make some metal ions such as Ni2+、Co2+、Pb2+、Mn3+Black oxide precipitates are formed.It has strong oxidizability and coagulability.It will explode when mixed with organic or reducing substances.
Calculate chemical data
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Reference value for drainage parameter calculation (XlogP): None
Number of hydrogen bond donors: 0[2]
Number of hydrogen bond receptors: 8[2]
Number of rotatable chemical bonds: 1[2]
Number of tautomers: 0
Topological molecular polar surface area: 150[2]
Number of heavy atoms: 12[2]
Surface charge: 0[2]
Complexity: 206[2]
Number of isotope atoms: 0[2]
Determine the number of atomic structure centers: 0[2]
Number of uncertain atomic structure centers: 0[2]
Determine the number of chemical bond structure centers: 0[2]
Number of uncertain chemical bond structure centers: 0[2]
Number of covalent bond units: 3[1]
toxicology data
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Acute toxicity: LDfifty: 802mg/kg (rat oral)
purpose
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1. Mainly used as disinfectant and fabric bleaching agent;
2. It is used as an initiator for emulsion polymerization of vinyl acetate, acrylate, acrylonitrile, styrene, vinyl chloride and other monomers (use temperature 60~85 ℃), and as an accelerator for synthetic resin polymerization;
3. Potassium persulfate is an intermediate of hydrogen peroxide produced by electrolysis, which is decomposed to generate hydrogen peroxide;
4. Potassium persulfate is used in the oxidation solution of steel and alloy, etching and roughening of copper, as well as the treatment of solution impurities;
5. It is used as analytical reagent, oxidant and initiator in chemical production.It is also used for film development and printing, as sodium thiosulfate remover, etc.
Protective measures
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Skin contact: Take off contaminated clothes and wash with plenty of flowing water.
Eye contact: Lift the eyelid and flush with flowing water or physiological saline.Get medical attention.
Inhalation: quickly leave the site to a place with fresh air.Keep the respiratory tract unobstructed.If breathing is difficult, give oxygen.If breathing stops, perform artificial respiration immediately.Get medical attention.
Ingestion: drink enough warm water to induce vomiting.Get medical attention.
Fire fighting measures
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Hazard characteristics: inorganic oxidant.There is a risk of combustion and explosion when contacting or mixing with organic substances, reducing agents, combustibles such as sulfur, phosphorus, etc.Explosion may occur when heated sharply.
Hazardous combustion products: sulfur oxide and oxygen.
Fire extinguishing method: use fog water, foam and sand to extinguish the fire.
Extinguishing agent: fog water, foam, sand.
Leakage emergency treatment
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Isolate the leakage contaminated area and restrict access.It is recommended that emergency personnel wear dust masks (full face masks) and gas suits.Do not touch the leakage directly.Do not allow the leakage to contact with organics, reducing agents and inflammables.
Small amount of leakage: sprinkle soda ash on the ground and collect it in a dry, clean and covered container.A large amount of water can also be used for flushing, and the diluted washing water will be discharged into the waste water system.
Large amount of leakage: collect and recycle or transport to waste disposal site for disposal.
Protective measures
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Engineering control: the production process is closed and ventilation is strengthened.Provide safety shower and eyewash equipment.
Respiratory system protection: When it is possible to contact with its dust, you should wear a hood type electric air supply filter type dust respirator.In high concentration environment, it is recommended to wear self-contained breathing apparatus.
Eye protection: protection has been made in respiratory system protection.
Body protection: wear polyethylene gas protective clothing.
Hand protection: wear rubber gloves.
Other protection: smoking, eating and drinking are prohibited at the work site.After work, take a shower and change clothes.Keep good hygiene habits.
technical standard
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Index name
Premium
First Grade
Qualified products
appearance
White crystalline powder
Mass fraction of potassium persulfate/%
≥98.5
ninety-eight
ninety-eight
Free acid (as HtwoSOfourCalculation)/%
≤ 0.10
zero point two zero
zero point two zero
Chloride (as Cl-Calculation)/%
≤ 0.005
zero point zero one zero
zero point zero one five
Ammonium salt (as NHfour+Calculation)/%
≤ 0.5
zero point seven
zero point nine
Iron (Fe)/%
≤ 0.003
zero point zero zero four
zero point zero zero five
Moisture/%
zero point three zero
zero point three zero
zero point three zero
Operation, disposal, storage and transportation
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Precautions for operation: close operation and strengthen ventilation.Operators must be specially trained and strictly abide by the operating procedures.It is recommended that operators wear hood type electric air supply filter type dust respirator, polyethylene gas suit and rubber gloves.Keep away from kindling and heat sources, and smoking is strictly prohibited in the workplace.Avoid dust generation.Avoid contact with reducing agent, active metal powder, alkali and alcohol.Load and unload gently during transportation to prevent damage to packaging and containers.Vibration, impact and friction are prohibited.Fire fighting equipment and leakage emergency treatment equipment of corresponding types and quantities shall be provided.Empty containers may leave harmful substances.
Precautions for storage: store in a cool, dry and well ventilated warehouse.Keep away from kindling and heat sources.Packing and sealing.It shall be stored separately from reducing agents, active metal powders, alkalis, alcohols, etc., and mixed storage is strictly prohibited.The storage area shall be equipped with appropriate materials to contain leakage.
Packaging method: plastic bag or two-layer kraft paper bag with full opening outside or middle opening steel drum;Ordinary wooden case outside plastic bag or two-layer kraft paper bag;Screw mouth glass bottle, iron cap pressure mouth glass bottle, plastic bottle or ordinary wooden case outside metal bucket (can).
Precautions for transportation: during railway transportation, the dangerous goods shall be loaded in strict accordance with the dangerous goods loading table in the Dangerous Goods Transportation Rules of the Ministry of Railways.It shall be transported separately, and the container shall not leak, collapse, fall or be damaged during transportation.The transport vehicles shall be equipped with corresponding types and quantities of fire-fighting equipment.It is strictly prohibited to transport together with acids, inflammables, organics, reducing agents, spontaneous combustion materials, inflammables in wet conditions, etc.During transportation, the speed should not be too fast, and forced overtaking is not allowed.Transport vehicles shall be thoroughly cleaned before and after loading and unloading. It is strictly prohibited to mix with organic substances, combustibles and other impurities.
security information
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Safety terminology
S22：Do not breathe dust.
Do not breathe dust.
S24：Avoid contact with skin.
Avoid skin contact.
S26：In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
In case of contact with eyes, please immediately flush with plenty of water and seek medical advice.
S37：Wear suitable gloves.
Wear appropriate gloves.
Risk terminology
R8：Contact with combustible material may cause fire.
Contact with combustible materials may cause fire.
R22：Harmful if swallowed.
Harmful if swallowed.
R36/37/38：Irritating to eyes, respiratory system and skin.
Irritating to eyes, respiratory system and skin.
R42/43：May cause sensitization by inhalation and skin contact.
May cause sensitization by inhalation and skin contact.
