Canftech TA465D Is a premium grade macroporous type I strong base anion exchange resin with polystyrene matrix and quaternary amine (Triethylamine) function group in standard Gaussian size distribution. TA465D has strong selectivity to capture nitrate and decreased selectivity for other anions such as sulfate, chloride and bicarbonate. TA465D is designed to be used to remove nitrate and nitrite from potable water.