ResinTech CG8-C-HP is a high purity coarse grade strong acid cation resin in sodium form. It is amber in color and made with an 8% cross-linked gel. The HP (high purity) designation means it is Gold Seal Certified by the WQA for use in potable water applications. It is intended for use in potable water applications where maximizing peak flow rates and minimizing pressure loss are essential.