Toxicity testing is a field of research that focuses on assessing the potential harmful effects of chemical substances on living organisms. This testing is crucial in determining the safety of various products, including pharmaceuticals, industrial chemicals, and environmental pollutants. Toxicity testing involves exposing organisms, such as animals, cells, or bacteria, to different concentrations of substances and observing their response, such as changes in behavior, growth, reproduction, and cell structure. The goal of toxicity testing is to identify and quantify the potential risks associated with exposure to certain chemicals and to inform regulatory decisions about the use and disposal of these substances to protect human health and the environment.