Yuhui C-SMS is a premium grade macroporous strong acid cation (SAC) exchange resin based on sulfonated styrene-divinylbenzene (DVB) copolymers with standard Gaussian particle size distribution. Its macroporous matrix structure offers the optimal performance on resistance to both osmosis shock and organic fouling. C-SMS is developed to be used for industrial water softening when it works in sodium form and demineralization when it works in hydrogen form, especially for water with high organic content and where the more durable resin is required.