Commonly used materials for fireworks: 15, Properties of phenolic resin

Fireworks commonly used materials: 15, phenolic resin properties English name phenolic resin; molecular formula for C48H42O7, molecular weight of 730.

1. Physicochemical properties. Appearance and properties: according to the different chemical structure and molecular weight size, there are liquid or solid; minimum ignition energy: 10MJ; maximum explosion pressure: 0-420 MPa .
2. Health Hazard. Its dust can cause headache, drowsiness, peripheral weakness, respiratory mucous membrane irritation symptoms, wheezing bronchitis and skin diseases, but also kidney damage can occur. Phenol, formaldehyde and ammonia are found in air environment analyses. Formaldehyde, phenol, and carbon monoxide poisoning occur during condensation.
3. Hazardous Characteristics. Flammable, irritating, can burn when exposed to open flame and high heat. Decomposed by high heat to release toxic gases. Powder and air to form explosive mixtures, reach a certain concentration, will explode when exposed to sparks.
4. Emergency treatment of leakage. Rapidly evacuate the leaking contaminated area to the safe area, and isolation, strict restrictions on access. Cut off the source of fire. It is recommended that emergency personnel wear self-contained positive pressure respirators and anti-static work clothes. In case of liquid, cut off the source of leakage as far as possible and prevent it from flowing into restricted space such as sewers and flood drains. Small spills: Absorb with dry sand or similar material. Large spill: Construct a dike or dig a pit to contain the spill, cover with foam to reduce vapour hazard. Transfer to tanker or special collector with explosion-proof pump, recycle or transport to waste disposal site for disposal. If solid, collect in dry, clean, covered containers and bury deep in a special waste site. If spilled in large quantities, recycle or transport to a waste disposal site for disposal.
5. Fire Extinguishing Methods. Spray water to cool the container and move the container from the fire to an open area if possible. Extinguishing agents: mist water, foam, carbon dioxide, dry powder, sand, etc.