The document discusses chemical hazard labels and Material Safety Data Sheets (MSDS). It explains that chemical hazard labels use a numbering system to indicate health, flammability and reactivity risks. An MSDS provides information about safety hazards of a chemical, first aid measures, and emergency response procedures. It has a standardized format including sections that cover chemical identification, composition, hazards, safety precautions, and other important details. The MSDS aims to ensure safe handling of chemicals and appropriate response if accidents occur.