Fivebro water services suppliesoffers a strong acid cat-ion exchange resin. This exchange resin is used for water softening. Infinity csa 121i has a strongly acidic unifunctional cross linked polystyrene structure which contains containing sulphonic acid groups. These strong acid cat-ion exchange resin finds its applications in: softening - the excellent physical and chemical stability permits infinity csa 121i for its use for high speed industrial softening and also for domestic softening- it is a high capacity gel type resin with excellent physical and chemical properties specially developed for industrial and domestic water softening applications. This strong acid cat-ion exchangee resin is provided supplied in sodium form and can also be used in demineralisation and other special applications. Infinity csa 121i is highly resistant to attrition and osmotic shocks and also offers minimum pressure drop across the resin bed under a wide variety of operating conditions.