AA/AMPS is the copolymer of acrylic acid and 2-acrylamide-2-methylpropane sulfonic acid. Due to including carboxylic group (scale inhibition and dispersion) and sulfonic acid group (strong polarity) in this copolymer, AA/AMPS has high calcium tolerance and good scale inhibition for calcium phosphate, calcium carbonate and zinc scale.

When built with organophosphines, the synergic effect is obvious. AA/AMPS copolymer is suitable to be used in water quality of high pH and high alkaline. AA/AMPS copolymer is one of the ideal scale inhibitor and dispersant on high concentration index.