Strong acid styrene cation exchange resin can be used in water softening, water purification, etc. There are -SO3H groups on styrene -= ethene benzene polymer, its acidity is similar to HCl and H2SO4. It offer ion exchange capacity in basic, acid and neutral condition. It offer large exchange quantity, fast speed and good mechanical strength. Brand 732#, is similar to USA :Amberlite IR-120, Dowex ...