Magnesium, Potassium, Sodium Titanium, Alkyllithiums, Grignards, and Diethylzinc are extremely combustible Therefore, people must be caution and follow appropriate safety measures when used These chemicals react violently with water, air and other chemicals and cause class D fires which burn at high temperatures Thus, typical fire extinguishers are not sufficient for this type of fire Class D contains Sodium Chloride or Graphite metal-based powder When discharge on a fire, the heat causes the powder to cake and form a crust The crust excludes air and dissipates the heat.
