CAS 6192-52-5 appears in our catalog under these names: p-Toluenesulfonic acid monohydrate, 97% , p-Toluenesulfonic acid monohydrate, ACS, 98.5+% . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 25g, 100g, 500g, 1000g, 5000g, 250g.