This product is a type of ion exchange resin where the polymer matrix of styrene-divinylbenzene copolymer crosslinking structure has a quaternary ammonium group. The alkality of this product is equivalent to that of normal quaternary ammonium alkali. It also presents ion exchange function in acidic, neutral, even alkaline medium. The product possesses good mechanical strength and high heat resistibility.

Original designation of this product is 717#, which is equivalent to Amberlite IRA-400 in the us, SA-10A in Japan