Question

before using any chemical in the lab, why should one first read the material safety data sheet (msds)?
the msds provides information on safe handling of the chemical.
the msds explains where the chemical can be purchased.
the msds provides the chemical formula for the substance.
the msds describes how the chemical will react with other substances.

Explanation:

The Material Safety Data Sheet (MSDS) is designed to give details about the safe handling of chemicals. It includes information such as potential hazards (like toxicity, flammability), proper storage, and handling procedures. Purchasing information is usually from suppliers, not MSDS. The chemical formula is often on the chemical container label. While some reactivity info might be in MSDS, its primary and most important role is safe - handling guidance.

Answer:

The MSDS provides information on safe handling of the chemical.