Remarkable and interesting that powdered metals can be fire-extinguishing agents. I'd have guessed they'd be flammable themselves. https://amerexfireextinguish

Remarkable and interesting that powdered metals can be fire-extinguishing agents. I'd have guessed they'd be flammable themselves. https://amerexfireextinguishers.com/products/amerex-30lb-class-d-c571 https://amerexfireextinguishers.com/products/amerex-30lb-cla... ("30 lb Class D Copper Fire Extinguisher - Model C571") - "MODEL C571 contains a copper extinguishing agent specially developed by the U.S. Navy for fighting lithium and lithium alloy fires. The copper compound smothers the fire and provides an excellent heat sink for dissipating heat. Copper powder has been found to be superior to all other known fire extinguishing agents for lithium metal fires. Not recommended for lithium-ion battery fires."