Which type of fire extinguisher is specifically designed for Class B and C fires?

The purple-K extinguisher is specifically formulated to combat Class B and C fires. Class B fires involve flammable liquids, such as gasoline, oil, and greases, while Class C fires are electrical in nature, involving live electrical equipment. The purple-K extinguishing agent, which contains potassium bicarbonate, is effective in smothering the flames caused by these types of fires, preventing re-ignition and effectively extinguishing the fire.

In contrast, while a water extinguisher is effective on Class A fires (ordinary combustibles), it is not suitable for Class B or C fires due to the risk of spreading the fire or creating electrical hazards. A CO2 extinguisher is useful for Class B and C fires as well, but it is not specifically identified as designed for both classes in the same context as the purple-K. An AFFF (Aqueous Film Forming Foam) extinguisher is also used for Class B fires but can be less effective on electrical fires, making the purple-K the more appropriate choice for both Class B and C fire types.