Portable fire extinguishers are designed to extinguish or control small fires. They are not intended to fight a large or spreading fire. Laboratories that use flammable liquids are equipped with multipurpose fire extinguishers, typically marked on the wall adjacent to each doorway. Fire extinguishers are required to be unobstructed, are to be visually checked and their tags initialed by laboratory supervisor/administrators on a monthly basis. Please visit the University of Toronto Fire Prevention website for more details.