Ethylene glycol bis-p-toluenesulfonate is primarily used as a crosslinking agent in polymer chemistry. It facilitates the formation of covalent bonds between polymer chains, enhancing the mechanical strength and thermal stability of the resulting materials. This chemical is also employed in the synthesis of specialty polymers and resins, where it acts as a key intermediate to produce high-performance coatings, adhesives, and composites. Additionally, it finds application in organic synthesis as a reagent for introducing tosyl groups, which are useful in protecting alcohols or amines during complex chemical reactions. It is further utilized in the pharmaceutical industry for the production of certain drugs, serving as an efficient molecular linker. Its role in creating durable and resilient materials makes it valuable in industries such as automotive, aerospace, electronics, and pharmaceuticals.