The Hazard Communication Standard categorizes classes of chemicals using how many physical properties?

The Hazard Communication Standard (HCS) categorizes classes of chemicals based on nine specific physical properties. These properties help to identify the hazards associated with different chemical substances, ensuring that workers and emergency responders have the necessary information to handle them safely. By classifying chemicals according to these properties, the HCS promotes better communication and understanding of potential risks in the workplace.

The nine physical properties used in the HCS are essential for classifying chemicals and include factors such as flammability, reactivity, and corrosiveness, among others. This systematic approach is crucial for providing clear safety data sheets and labeling requirements, which are vital components of occupational health and safety practices. Understanding the nine properties allows those in the field to recognize hazards more effectively, enhancing workplace safety.