evaluated on the basis of pH. A material with a pH less than 5.5 or greater than 9.5 is a corrosive hazardous material. The warning word(s) CORROSIVE, CAUSTIC, ACID, ALKALINE on a material's label indicate that the material is a corrosive hazardous material. The Material Safety Data Sheet will usually indicate the pH.

Ability of water to dissolve or break down certain substances, particularly metals.

An indication of the corrosiveness of water. The corrosiveness of water is described by the water's pH, alkalinity, hardness, temperature, total dissolved solids, dissolved oxygen concentration, and Langelier saturation index.

Tendency of an environment to cause corrosion in a given corrosion system.