CAS 16788-57-1 appears in our catalog under these names: Potassium hydrogen phosphate trihydrate, Reagent Grade , Potassium phosphate, dibasic, trihydrate, extra pure, di-Potassium hydrogen orthophosphate trihydrate, for analysis, Potassium phosphate, dibasic trihydrate, 99+%, for analysis, di-Potassium hydrogen phosphate trihydrate, 98.50%. Offered by: Thermo Scientific (Alfa Aesar), Thermo Scientific (Acros), Thermo Scientific (Fisher), Chemat, Chempur. Available pack sizes: 250g, 1kg, 500g, 2.5KG, 25g, 50g, 100g, 10g.