An ignitable waste with a flash point less than 140 degrees F or is easily combustible. Examples are solvents or paint wastes. A corrosive waste with a pH less than 2 or greater than 12.5 and can dissolve metals, other materials, or burn the skin. Examples are acids and bases. A reactive waste that is unstable or undergoes rapid or violent chemical reaction with water or other materials.
Examples are oxidizers and flammable solids.
Examples include mercury, lindane and 3,3 diaminobenzidine. All laboratories that dispose of chemicals must have a copy of the Chemical Waste Management Guide to determine how to properly manage your wastes. When in doubt treat all wastes as if they are hazardous. Unknown materials must be identified before they can be sent for treatment and disposal. This can become quite expensive.