Dry Chemical Fire Extinguishers
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Monoammonium phosphate – also called ABC or multi-purpose fire extinguishers, monoammonium phosphate extinguishers are capable of extinguishing Class A, B, and C fires. You can read more about multi-purpose fire extinguishers here.
Sodium bicarbonate – one of the most common dry chemical fire extinguishing materials, sodium bicarbonate (baking soda) can be used on class B and C fires and was the first dry chemical agent ever developed. The way sodium bicarbonate works is by heating up and releasing a cloud of carbon dioxide that smothers the fire, depriving it of oxygen and breaking the chemical reaction required for the fire to sustain itself. It is not suitable for Class A fires because it does not reduce heat from the fire, meaning it does not prevent burning materials from reflashing.
Potassium bicarbonate(Purple-K) – Purple-K is used to put out Class B and C fires. With twice the extinguishing effectiveness of sodium bicarbonate, Purple-K is preferred by the oil and gas industry and is the only dry chemical agent certified for use in ARFF (Aircraft Rescue and Fire Fighting).
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