Ignitable wastes are wastes that can easily catch on fire and sustain combustion. Wastes are considered ignitable when they exhibit any of the following characteristics:

• Liquid, other than an aqueous solution with less than 24% alcohol by volume, with a flashpoint below 140 F (60 C) as determined by flashpoint testing.
• A non-liquid that is capable, under STP, of causing fire through friction, absorption of moisture or spontaneous chemical changes and, when ignited, burns so vigorously and persistently that it creates a hazard. Non-liquids are more difficult to test.
• Ignitable compressed gas
• Oxidizer