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Classes of Fire and Proper Types of Extinguishers

The National Fire Protection Agency (NFPA) is a non-profit organization dedicated to protecting human life and property from fire. The NFPA has designated classes of fire based on the type of material that is fueling the fire.

In order to properly extinguish a fire, you must be familiar with the three MOST common classes of fires:

  • Class A
  • Class B
  • Class C
The MOST common types of laboratory extinguishers are:
  • Pressurized dry chemical (ABC or BC)
  • Carbon dioxide (CO2)
Note: Water-filled fire extinguishers are NOT appropriate for laboratory use due to the presence of class B and C ignition sources.