Flammable

Some liquids, solids, and gases are flammable enough to be considered hazardous waste, including:

• Liquids with flashpoints below 140 degrees F (in other words, at temperatures below 140 degrees F they build up enough flammable vapor to light with a match).
• Solids that ignite spontaneously through friction or contact with moisture.

Examples include:

• many volatile organic solvents
• pure sodium