What are the two primary sources of information on hazardous materials?

The two primary sources of information on hazardous materials are the product label and the Material Safety Data Sheet (MSDS), which is now commonly referred to as Safety Data Sheet (SDS). The product label provides essential details about the substance, including safety warnings, handling instructions, and emergency measures. It serves as a quick reference for anyone handling the material.

The MSDS or SDS is a comprehensive document that contains more detailed information about the hazardous material, including chemical properties, health effects, protective measures, and emergency response procedures. It is critical for ensuring safe handling and can be referenced for regulatory compliance and training.

These two sources together provide both immediate information for on-the-spot safety and in-depth guidance for safe practices when dealing with hazardous materials, making them indispensable in any workplace that uses chemicals. The other options may suggest alternative resources, but they do not represent the primary sources recognized in workplace safety standards.