This study aimed to show the chemical recycling process of glass ionomer cement capsules (Chemfil Rock, Dentsply). The process included acetone to attack polystyrene, separation of the dye (Rhodamine B) inside the polymer, and photodegradation by TiO 2 nanoparticles. The chemical reaction of the acetone solvent with the polystyrene degraded the material as power, but with the dye. The centrifugation technique separated the polystyrene from Rhodamine B dissolved in acetone. After that, the mixture was placed on the stove to evaporate the acetone and the dye was mixed with water and 10 mg of TiO 2 nanoparticles. The solution was exposed to UV radiation for 1 hour. Discoloration of the solution showed that Rhodamine B was degraded by TiO 2 nanoparticles. XRD confirmed the presence of crystalline anatase TiO 2 . FTIR analysis confirmed the existence of polystyrene organic groups in the powder resulting from centrifugation. This process was a feasible possibility to decrease the plastic residues of dental material capsules.