 The research did not produce any anesthetics, but the research included tests on the issue of flammability, and showed that the tested fluorocarbons were not flammable in air in any proportion, though most of the tests were in pure oxygen or pure nitrous oxide (gases of importance in anesthesiology).In 1993, 3M considered fluorocarbons as fire extinguishants to replace CFCs.This extinguishing effect has been attributed to their high heat capacity, which takes heat away from the fire.