1-Acetyl-2-phenylhydrazine is primarily used in organic synthesis as an intermediate for the production of various pharmaceuticals and agrochemicals. It plays a role in the synthesis of heterocyclic compounds, which are essential in developing drugs with therapeutic properties. Additionally, it is utilized in research laboratories for studying chemical reactions and mechanisms, particularly those involving hydrazine derivatives. Its application extends to the development of dyes and pigments, where it contributes to the creation of colorants with specific properties.