4-Methylbenzophenone

4-Methylbenzophenone (CAS 134-84-9, EC 205-159-1) is an aromatic ketone supplied as a white to beige crystalline solid. Also known as 4-Benzoyltoluene, p-Benzoyltoluene, and p-Methylbenzophenone, it carries no assigned E-code and is classified under HS code 29143900.

In UV-curable coatings and printing inks, 4-Methylbenzophenone acts as a photoinitiator by absorbing UV radiation and generating reactive species that trigger polymer crosslinking. It also functions as a UV stabilizer in plastics and adhesive formulations, where it intercepts UV energy to retard oxidative degradation of the polymer matrix.

This material is available in technical grade as a crystalline powder, compliant with REACH registration requirements for supply within the EU. Procurement teams should confirm lot-specific purity documentation and SDS availability prior to ordering. Standard packaging formats include fibre drums and multi-layer bags suited for bulk industrial supply.