Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 87-66-1, Whether you call it Pyrogallol, Benzene-1 -2 -3-triol , Pyrogallic Acid or 1 -2 -3-Trihydroxybenzene you can be assured the Pyrogallol products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.