p-Toluenesulfonamide

P-Toluenesulfonamide (CAS 70-55-3) is a sulfonamide compound commercially known as PTSA, Tosylamide, or p-Tosylamide, with EC number 200-741-1 and molecular formula C7H9NO2S. It carries no assigned E-code. It belongs to the amine chemical category and is classified under HS code 29350090.

In plastics and polymer processing, PTSA functions as a foaming agent by decomposing under heat to release gas at controlled rates, enabling consistent cell structure in foam products. In water treatment and textile applications, it acts as an antimicrobial agent, disrupting microbial cell membranes to inhibit bacterial and fungal growth in process water and treated substrates.

P-Toluenesulfonamide is supplied as a crystalline powder and is subject to REACH registration requirements for EU market supply. Buyers should confirm grade specifications and batch documentation with the supplier, as purity requirements vary between industrial and specialty formulation applications. Standard packaging formats are available on request.