Hazard classification is the process of identifying and categorizing substances or situations based on their potential risks to health, safety, and the environment. This system helps in determining how to handle, store, and transport materials safely. It is essential for regulatory compliance and ensuring public safety. Different organizations, such as the United Nations and Occupational Safety and Health Administration (OSHA), have established guidelines for hazard classification. These guidelines often include criteria for physical hazards, health hazards, and environmental hazards, allowing for a standardized approach to risk management across various industries.