Chemical formula: CH3C6H4SO3H - H2O CAS No.: 6192-52-5 Synonym: 4-Methylbenzenesulfonic acid, p-Toluene Sulfonic acid, Tosic acid, Tosylic acid, PTSA etc. Appearance: White crystalline powder Grade-A: purity 98% Free sulfuric acid 0.3% Max. Grade-B: purity 97% Free sulfuric acid 0.5% Max. Grade-C: purity 96% Free sulfuric acid 1% Max. Grade-D: purity 95% Free sulfuric acid 3% Max. Packing: 1. 25 kg paper bag with inner PE bag 2. 300 kg jumbo bag 3. 500 kg jumbo bag Product origin: Taiwan Application: PTSA is widely used as a catalyst and an intermediate in various applications: 1. As a catalyst in the synthesis of pharmaceuticals, manufacturing of plasticizers, paint & coating industry, cross linking reactions, curing agent, organic synthesis, esterification, condensation, polymerization, alkylation etc. 2. As an intermediate in the manufacturing of fine chemicals, dyestuffs & pigments. 3. As a curing agent in thermosetting resin systems, acrylic resins, foundry resins (sand casting).