... Data Sheet D113 is a premium grade, weak acid, macroporous, cation resin. Polymer Matrix Structure______________Acrylic ... % min.Functional Groups____________________R-COOHIonic Form ,as shipped________________HTotal Exchange Capacity, H+ form, wet, volumetric__________________________4.2 ... .18PH Range, operating________________4 - 14 Macroporous Weak Acid Cation Exchange Resin