What residue does a CO2 fire extinguisher leave when discharged?

A CO2 fire extinguisher discharges carbon dioxide gas, which is a clean agent used to extinguish fires. When CO2 is released, it does not leave behind any significant residues or contaminants that can affect equipment or clean-up efforts. This characteristic makes it especially valuable for use in environments where cleanliness is essential, such as in server rooms or on electrical fires.

Unlike other extinguishing agents, such as those based on water or foam, CO2 does not leave mineral salts, carbon, or iron oxides behind. The absence of residue means that after using a CO2 extinguisher, there's minimal cleanup required, allowing for a quick return to regular operations.