Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 5398-34-5, Whether you call it Disodium 8-Amino-1,3,6-naphthalenetrisulfonate or 1-Naphthylamine-3 -6 -8-trisulfonic Acid Disodium Salt you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.