This document provides guidance on hazard communication and material safety data sheets (MSDS) for employees. It defines hazardous materials like flammable, toxic, and caustic substances. It explains that MSDS must be available for all such materials used. The document also reviews what information can be found in each section of a MSDS, such as hazardous ingredients, health effects, handling instructions, and more. It stresses the importance of reading MSDS and using proper protective equipment when working with chemicals.