1,3-Diphenylpropanetrione is primarily utilized in organic synthesis as a versatile intermediate for the preparation of various heterocyclic compounds. Its trifunctional carbonyl structure makes it a valuable building block in the synthesis of complex molecules, particularly in the development of pharmaceuticals and agrochemicals. Additionally, it is employed in the study of reaction mechanisms, serving as a model compound to explore carbonyl chemistry and cyclization processes. Its application extends to materials science, where it is used in the synthesis of organic dyes and pigments due to its ability to form stable conjugated systems.