Yuhui C-SS7FG is a premium food grade gel-type strong acid cation (SAC) exchange resin based on sulfonated styrene-divinylbenzene (DVB) copolymers with standard Gaussian particle size distribution. Due to the special post-treatment process, C-SS7FG becomes the cleanest resin without extractable chemical residuals causing color leach, PH drop and unpleasant odor & taste to water. Its 7% cross-linkage offers the optimal performance on both kinetics and resistance to oxidation. C-SS7FG is developed to be used for residential regenerable water softeners. It can also be used for potable water filter cartridges and other applications where safe and clean softening resin is required.