What materials are included in a Material Safety Data Sheet?

The correct answer focuses on the essential purpose of a Material Safety Data Sheet (MSDS), which is to communicate information about the hazards of a chemical substance as well as details regarding its chemical composition. The inclusion of chemical composition and hazards provides vital information to ensure safe handling, storage, and usage of the chemical, as well as emergency measures to take in case of exposure or spills. This information is critical for protecting workers, first responders, and the environment.

Chemical composition outlines what the substance is made of while hazard information describes the potential risks associated with handling it, such as toxicity, flammability, and reactivity. This ensures that users are aware of the necessary precautions and protective measures required to minimize risks.

Other options, while they might be found in various contexts, do not capture the primary focus of an MSDS. Cost of chemicals, for example, is not relevant in terms of safety compliance and does not aid in understanding the material's hazards or risks. Similarly, laboratory testing results may not be routinely included, as the MSDS is meant to highlight safety information rather than testing outcomes. Additionally, while supplier contact information can be useful, it is secondary compared to the critical safety and hazard details directly impacting the handling of the materials involved.