Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 5541-93-5, Whether you call it Phospho(enol)pyruvate Trisodium Salt, Hydrate, PEP , 2-(Phosphonooxy)-2-propenoic Acid or 2-Propenoic Acid 2-(Phosphonooxy) you can be assured the Phospho(enol)pyruvate Trisodium Salt, Hydrate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.