Commonly used materials for fireworks: 9. Properties of Red Dan

Fireworks commonly used materials: 9. Properties of red Dan English name lead tetroxide : molecular formula for Pb3O,, molecular weight of 685.60.

1. Physicochemical properties. Appearance and properties: bright orange-red powder or lumpy solid; Boiling point: 500°C (decomposition); Relative density (water = 1):9.1; Solubility: insoluble in water, soluble in hot lye, dilute nitric acid, acetic acid, hydrochloric acid and so on.
2. Health Hazards. Frequent inhalation through the mouth or nose can be toxic, causing headache, nausea, vomiting, abdominal cramps, anaemia and other symptoms.
3. Hazardous properties. Decomposed by high heat to release toxic body.
4. Emergency treatment of leakage. Isolate the leaking contaminated area and restrict access. It is recommended that emergency personnel wear dust masks (full face masks) and anti-virus clothing. Do not directly contact the leaked material. Small amount of leakage: Avoid raising dust and collect in dry, clean, covered containers with a clean shovel. Large quantity leakage: cover with plastic sheet, canvas, etc., then collect for recycling or transport to waste disposal site for disposal.
5. Fire extinguishing methods. Use water, sand, etc. to extinguish the fire.