2-Diphenylaminoethanol is primarily used in the synthesis of various pharmaceutical compounds. It acts as an intermediate in the production of antihistamines and other therapeutic agents, contributing to the development of medications that treat allergies and related conditions. Additionally, it is utilized in organic synthesis for creating complex molecules, particularly in the field of medicinal chemistry. Its role in the preparation of dyes and pigments also makes it valuable in the chemical industry for producing colorants. Furthermore, it finds application in research and development as a reagent for studying chemical reactions and mechanisms.