9,9-Dimethylxanthene is primarily used as an intermediate in organic synthesis, particularly in the production of dyes, pigments, and fluorescent materials. Its structure makes it valuable in the development of compounds with specific optical properties, which are applied in imaging and sensing technologies. Additionally, it serves as a building block in the synthesis of complex organic molecules for pharmaceuticals, where its rigid framework can enhance the stability and activity of drug candidates. In material science, it is utilized in the creation of advanced polymers and coatings that require specific light-absorbing or emitting characteristics.