1,3,5-Trioxane is widely used as a stable solid source of formaldehyde, which is essential in various industrial and chemical processes. It is commonly employed in the production of resins, particularly phenolic resins, which are utilized in adhesives, coatings, and molded products. Additionally, it serves as a key component in the synthesis of other chemicals, including pesticides and pharmaceuticals. In the field of materials science, it is used to create polymers and plastics with specific properties. Its ability to release formaldehyde in a controlled manner makes it valuable in applications requiring precise chemical reactions. Furthermore, it is used in fuel additives to improve combustion efficiency and reduce emissions in certain types of engines.