What class of fire involves sodium or magnesium?

The class of fire involving sodium or magnesium is categorized as Class D. This classification is specifically designated for fires that involve combustible metals, such as magnesium, sodium, potassium, and other similar materials. These types of fires require unique firefighting methods because traditional extinguishing agents, such as water, can react violently with these metals, potentially worsening the fire.

Class D fires typically occur in environments like metal processing industries, laboratories, or any setting where these metals are present. Special dry powder extinguishing agents are used to control Class D fires because they can smother the flames and prevent re-ignition without the risk of hazardous reactions that water could provoke. Understanding this classification is crucial for safety training and emergency response related to potential fire hazards in environments dealing with combustible metals.