Using a less toxic chemical in place of a more hazardous one is an example of:

Using a less toxic chemical in place of a more hazardous one exemplifies substitution. This approach is a fundamental concept in chemical safety and risk management, aiming to reduce the potential for harm by replacing dangerous substances with safer alternatives. Substitution is a proactive measure that addresses toxicity at the source, thereby minimizing the exposure risk for workers, the environment, and the public.

This strategy not only enhances safety but can also lead to improved regulatory compliance and a better overall image for an organization. In the context of chemical management, substitution is often prioritized in the hierarchy of controls, which advocates for eliminating hazards wherever possible rather than relying on personal protective equipment or engineering controls. The effectiveness of substitution depends on careful evaluation of the alternatives to ensure that they do not pose greater risks than the chemicals they replace.

In contrast, the other options do not directly relate to the act of replacing a substance with a less hazardous one. Minimization generally refers to reducing the quantities of hazardous materials used, moderation implies a balanced approach rather than an outright change, and simplification involves making processes less complicated or reducing steps but does not specifically address toxicity levels. Thus, substitution is the most precise term to describe the action of replacing a more hazardous chemical with a less toxic alternative.