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 a document that provides information on the safe handling, storage, and use of a chemical, including its potential hazards and safety precautions. It does not provide information on where to purchase the chemical, the chemical formula (though it may have some chemical - related details but not just the formula), or a detailed description of how it will react with other substances in all cases. Its main focus is safe handling.

Answer:

The MSDS provides information on safe handling of the chemical.