Types of Extinguishing Agents

There are essentially eight different extinguishing agents used in modern fire extinguishers. They consist of ABC Dry Chemical, BC Dry Chemical, Dry Powder, Water, Foam, Wet Chemical, Halogenated, and Carbon Dioxide. Each of these agents apply to one or more of the fire Classes mentioned above:

  • ABC Dry Chemical - Works on Class A, B, and C fires.
  • BC Dry Chemical - Works on Class B and C fires.
  • Carbon Dioxide - Works on Class B and C fires.
  • Water - Works on Class A fires.
  • Foam - Works on Class A and B fires.
  • Halogenated* - Works on Class A, B, and C fires.
    * Halogenated extinguishers are recommended for use around sensitive electrical equipment due to the fact that they will not leave a possibly damaging residue on the equipment as will other extinguishing agents.
  • Dry Powder - Works on Class D fires.
  • Wet Chemical - Works on Class K fires.