Ignitability: Ignitable wastes can create fires under certain conditions, are spontaneously combustible, or have a flash point less than 60 °C (140 °F). Ignitable Examples: Alcohols, Hydrocarbon gases/liquids (propane, hexane, gasoline), Acetone, Aromatic Hydrocarbons (Benzene, Xylene, Toluene).
Corrosivity: Corrosivity: Corrosive wastes are strong acids ( pH≤2 ) or strong bases ( pH≥12.5 ) and/or are capable of corroding metal containers, such as storage tanks, drums, and barrels. Corrosive Examples: Bases (Sodium Hydroxide, Bleach) or Acids (Hydrochloric/Muriatic, Sulfuric, Hydrofluoric, Phosphoric Acids).
Reactivity: Reactive wastes are unstable under "normal" conditions. They can cause explosions; can undergo violent reactions; can generate toxic fumes, gases, or vapors; or are explosive mixtures when heated, compressed, or mixed with water. Reactive Examples: Oxidizers (Oxygen, Nitric Acid, KMnO4, Bleach) or Explosives (Nitroglycerine, Tri-nitrotoluene, Picric Acid).
Toxicity: Toxic wastes are harmful or fatal when ingested or absorbed (e.g., containing mercury, lead, etc.). When toxic wastes are land disposed, contaminated liquid may leach from the waste and pollute ground water. Toxic Examples: Heavy Metals (Mercury, Cadmium, Nickel, Arsenic, Lead) or Poisonous Chemicals.