Hazardous waste may be toxic, ignitable, corrosive, reactive, or radioactive. Toxic waste can be reactive, ignitable, and corrosive. Investigators often use special dogs known as accelerant detection canines trained to smell ignitable liquids. These accelerants are also known as ignitable liquids. The properties of some ignitable liquids make them dangerous accelerants. Investigators often use special dogs known as "accelerant detection canines" trained to smell ignitable liquids. Inerting makes an ignitable mixture safe by introduction of an inert gas. It is common for the words fire accelerant and ignitable liquid to be used synonymously. The properties of some ignitable liquids make them dangerous fuels. It can form ignitable mixtures with air. The flammability limits of the gas define those proportions, i.e. the ignitable range. These irregular burn patterns can indicate the presence of an ignitable liquid in a fire. Purging, by definition, ensures that an ignitable mixture "never forms". It is ignitable with a burning match. It prevents ignitable electric energy from reaching the connector.