Substances, such as radioactive or chemical materials, which are dangerous to humans and other living things. Many hospitals have “hazardous materials plans” which are similar to (and sometimes incorporated within) their disaster preparedness plans and which deal specifically with handling emergencies involving hazardous materials. In the event of a nuclear or toxic chemical accident, the plan would go into effect.
A toxic material that may cause personal injury or property damage. The hazard of any material is determined by its chemical, physical, and biological properties and by the possibility of exposure to that material.