What is the main purpose of a chemical compatibility chart?

• A. To determine boiling points at various temps.
• B. To identify which chemicals can be stored or mixed safely and which should be segregated.
• C. To calculate shelf life.
• D. To predict color change in reactions.

Answer: (B)

A chemical compatibility chart is used to determine what can be stored together or mixed safely. It helps prevent dangerous interactions by indicating which chemicals are compatible and which must be kept apart. In practice, the chart guides decisions about where to store substances, how to group them in a facility, and how to handle and mix materials so that exothermic reactions, gas evolution, fires, or releases of toxic gases are avoided. It may show compatibility ratings and segregation rules (for example, keeping oxidizers away from organics, acids away from bases, and water‑reactive materials separate). This focus on safe storage and controlled mixing is what makes the chart valuable. It is not primarily about boiling points, shelf life, or predicting color changes, which are different chemical properties.