Commonly used materials for fireworks: 16. Properties of Polyvinyl Alcohol

Sixteen, the characteristics of polyvinyl alcohol English name polyvinyl alcohol; molecular formula for [C2H. O]. , relative molecular weight is 44.02.

1. Physical and chemical properties. Appearance and properties: milky white powder; relative density (water = 1): 1.31~1.34 (crystalline); solubility: insoluble in petroleum ether, soluble in water.
   

   Polyvinyl Alcohol

2. Health Hazards. Harmful by inhalation, ingestion or absorption through the skin, irritating to eyes and skin.
3. Hazardous Properties. Powder and air can form explosive mixtures, which will explode when exposed to sparks when a certain concentration is reached. Heating decomposition produces flammable gas.
4. Leakage emergency treatment. Isolate the leaking contaminated area and restrict access. Cut off the source of fire. It is recommended that emergency personnel wear dust masks (full face masks) and anti-virus clothing. Avoid raising dust. If a small amount leaks, sweep up carefully and place in a bag to transfer to a safe place. It can also be flushed with plenty of water, diluted and put into the waste water system. If a large amount leaks, cover with plastic sheeting, canvas, etc., and collect for recycling or transport to a waste disposal site for disposal.
5. Fire Fighting Methods. Firefighters shall wear gas masks and full body firefighting suits to extinguish the fire upwind. Extinguishing agent: mist water, foam, dry powder, carbon dioxide, sand, etc.