Potassium mu-oxobis(pentachlororuthenate(IV)) hydrate CMI Part 8043 Potassium mu-oxobis(pentachlororuthenate(IV)) hydrate CAS Number123359-44-4 Molecular Weight729.06 Molecular FormulaK4[(RuCl5)2O] .xH2O Request A Quote For all quote requests, please email Sales@colonialmetals.com or call 410.398.7200