Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 131-53-3, Whether you call it Dioxybenzone, 2 -2'-Dihydroxy-4-methoxybenzophenone , DL-Propranolol Hydrochloride or Benzophenone-8 you can be assured the Dioxybenzone products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.