Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 94-13-3, Whether you call it Propylparaben, Propyl 4-Hydroxybenzoate , Propyl p-Hydroxybenzoate or Propyl Parahydroxybenzoate you can be assured the Propylparaben products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.