Chemical additives are substances added to products such as food, cosmetics, and industrial materials to improve their properties or performance. These additives can serve a variety of functions, such as enhancing color, flavor, texture, and shelf life, as well as improving stability and safety. Common examples of chemical additives include preservatives, antioxidants, emulsifiers, thickeners, and flavor enhancers. Research in this area focuses on studying the effects of these additives on product quality, safety, and consumer perception, as well as developing new additives with improved properties and reduced environmental impact.