ResinTech SIR-1300 is a chloride form hybrid gel strong base anion resin. It has manganese oxide mono atomically dispersed throughout the polymer. The oxygen atoms combine with ferrous iron to form an insoluble ferric oxide, which is trapped inside the resin bed. Oxygen is replenished by air scour in the cleaning cycle, then accumulated iron particles are removed by backwash. SIR-1300 is intended for the removal of ferrous iron from potable water.