Dry chemical fire extinguishers are a type of fire suppression tool that uses a dry powder chemical agent to extinguish fires. These extinguishers are commonly used in both residential and commercial settings because of their effectiveness in putting out various types of fires. They are particularly useful in combating Class A (ordinary combustibles), Class B (flammable liquids), and Class C (electrical) fires.
The primary agent in dry chemical fire extinguishers is typically monoammonium phosphate, although other chemicals like sodium bicarbonate may also be used. When discharged, the powder works by interrupting the chemical reaction that fuels the fire, thereby smothering it and preventing re-ignition.
These extinguishers are easy to use and are generally considered versatile, but they can be messy, leaving residue that may damage sensitive equipment or surfaces. Regular maintenance and proper training are essential to ensure their effectiveness in an emergency.