Dissolve, filter, wash and dry. Reason: The mixture of potassium chlorate and manganese dioxide produces oxygen. Manganese dioxide is a catalyst and is not compatible with water, so dissolve it first, filter it again, and precipitate. It is manganese dioxide (may be mixed with other compatible substances), so it is washed and finally dried to obtain pure manganese dioxide.
Manganese dioxide (occurs naturally in the form of pyrolusite). Physical properties: black amorphous powder, or black orthorhombic crystals. Solubility: Insoluble in water, weak acid, weak alkali, nitric acid, cold sulfuric acid, dissolved in concentrated hydrochloric acid under heating to produce chlorine gas.
Extended information
Precautions
Hazard overview
Health hazards: Excessive manganese entering the body can cause poisoning. It mainly damages the central nervous system, especially the extrapyramidal system. Acute poisoning is rare in industrial production. If a large amount of this product's smoke is inhaled in a short period of time, "metal smoke fever" may occur, and the patient will suffer from headache, nausea, chills, high fever, and profuse sweating.
Chronic poisoning manifests as neurasthenic syndrome, autonomic nerve dysfunction, mental symptoms of imbalance of excitement and inhibition, and in severe cases toxic psychosis; extrapyramidal damage manifests as increased muscle tone, tremor, Speech disorder, gait abnormality, etc.
Flame and explosion hazard: This product is non-flammable and irritating.
First aid measures
Skin contact: Take off contaminated clothing and rinse with running water.
Eye contact: Lift eyelids and rinse with running water or saline. Seek medical attention.
Inhalation: Leave the scene quickly to fresh air. If breathing is difficult, give oxygen. Seek medical attention.
Ingestion: Drink enough warm water to induce vomiting. Seek medical attention.
Firefighting measures
Hazardous characteristics: No special combustion and explosion characteristics. It decomposes under high heat and releases toxic gases.
Hazardous Combustion Products: Natural decomposition products unknown.
Fire-fighting methods: Firefighters must wear full-body fire-proof and anti-virus clothing and put out fires in the upwind direction. When extinguishing a fire, move the container from the fire scene to an open area as much as possible.
Emergency leakage treatment
Emergency treatment: Isolate the leakage contaminated area and restrict access. It is recommended that emergency responders wear dust masks (full face masks) and protective clothing. Avoid raising dust, sweep it up carefully, put it in a bag and transfer it to a safe place. If there is a large amount of leakage, cover it with plastic sheeting or canvas. Collect and recycle or transport to waste disposal site for disposal.
Handling, handling and storage
Handling precautions: Close the operation and enhance ventilation. Operators must undergo special training and strictly abide by operating procedures. It is recommended that operators wear self-priming filter dust masks, chemical safety glasses, anti-toxic substance penetration overalls, and rubber gloves.
Keep away from flammable and combustible materials. Avoid dust generation. Avoid contact with reducing agents and acids. When handling, load and unload with care to prevent damage to packaging and containers. Equipped with leakage emergency treatment equipment. Empty containers may contain harmful residues.
Storage precautions: Store in a cool, ventilated warehouse. Keep away from fire and heat sources. It should be stored separately from flammable (combustible) substances, reducing agents and acids, and avoid mixed storage. Suitable materials should be available in the storage area to contain spills.
Baidu Encyclopedia-Manganese Dioxide