CAS 5990-32-9 appears in our catalog under these names: Zinc citrate dihydrate, Reagent Grade, Zn 31% min , Zinc citrate dihydrate, ZINC CITRATE DIHYDRATE, 97%. Offered by: Thermo Scientific (Alfa Aesar), Biosynth, Chemat, Sigma-Aldrich. Available pack sizes: 250g, 1kg, 2kg, 5kg, 10kg, 25kg, 100G, 500G.