Which salt is used in fire extinguisher?

The use of alkali metal salts as fire extinguishants is very far from new. Sodium bicarbonate, in particular, has been employed in hand extinguishers since at least the early 1940s, the first NFPA standard was issued in 1955, and off-road vehicles have been protected using these agents since the early 1960s.

IT IS IMPORTANT:  Whose house did the firefighters go to at the end of Part 2?
Tame a raging fire