CAS 52439-77-7 appears in our catalog under these names: Amberlite IRA-402 Chloride, Amberlite IRA-402(Cl), ion exchange resin , Amberlite® IRA-402, Cl-form, ion-exchange resin, AMBERLITE IRA-402, CL(-)-FORM, STRONGLY&. Offered by: TRC, Thermo Scientific (Alfa Aesar), Thermo Scientific (Acros), Sigma-Aldrich. Available pack sizes: 1g, 500mg, 5g, 2500g, 100g, 500g, 5KG, 250g.