How are hazardous materials classified by their physical states?

Hazardous materials are classified by their physical states primarily as solids, liquids, or gases. This classification is essential for identifying how the materials behave, how they can be packaged, handled, transported, and the types of hazards they may present.

Understanding these three basic physical states helps in determining the necessary safety protocols, storage conditions, and emergency response measures for each type of material. For example, solids can pose different risks than liquids or gases, especially concerning their handling and potential exposure during transportation or in case of an accident.

While other classifications might break these down further into subcategories, the primary and most recognized classification remains the distinction among solids, liquids, and gases, making this classification foundational in hazardous materials management.