Sodium Dichromate Dihydrate ACS Reagent, CAS 7789-12-0. Sodium Dichromate Dihydrate is an in organic compound with a chemical formula of Na2Cr2O7•2H2O. Sodium Dichromate Dihydrate has a molar mass of 298.00 g/mol and a density of 2.52 g/cm3. Na2Cr2O7 is odorless and appears as a bright orange…