Yuhui C-SS7 is a premium grade gel-type strong acid cation (SAC) exchange resin based on sulfonated styrene-divinylbenzene (DVB) copolymers with standard Gaussian particle size distribution. Its 7% cross-linkage offers the optimal performance on both kinetics and resistance to oxidation. C-SS7 is developed to be used for industrial water softening when it works in sodium form and demineralization when it works in hydrogen form.