Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 6683-19-8, Whether you call it Pentaerythritol Tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate) or Tetrakis(3 -5-di-tert-butyl-4-hydroxyhydrocinnamoyloxymethyl)methane you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.