What are dry chemicals?

Dry chemicals are powders or granules that are used as fire extinguishing agents. They are typically non-conductive and can be used on Class A, B, and C fires. Dry chemicals work by interrupting the chemical reaction of the fire, smothering the flames, or cooling the fuel source to extinguish the fire. Some common types of dry chemicals include sodium bicarbonate, potassium bicarbonate, and monoammonium phosphate.