PTSA ( Para-Toluene Sulfonic Acid ):
1. Used for acid-catalyst reaction such as estification, hydrolysis, dehydration, polymerization and alkylation as a catalyst.
2. As hardener of many resin systems, such as resoles, epoxies, amino-Plastics and furniture lacquers.
3. As intermediate of dye chemistry, adhesives and specialized plasticizers.