Sodium 2-acrylamido-2-methyl-1-propanesulfonate

Sodium 2-acrylamido-2-methyl-1-propanesulfonate (CAS 5165-97-9, EC 225-948-4) is a sulfonic acid-based acrylamide monomer supplied as a 50% aqueous solution. It is commonly referenced under trade designations including Lubrizol 2401, 2403, and 2405, and abbreviated in formulation literature as NaAMPS or AMPS sodium salt. No E-code designation applies.

In water treatment, NaAMPS copolymerizes with acrylic acid or acrylamide to produce scale-inhibiting and dispersant polymers that interrupt crystal growth on metal surfaces. In personal care formulations, it builds anionic charge density into carbomer-type thickeners, improving salt tolerance and electrolyte stability. In oilfield applications, it contributes thermal and hydrolytic stability to polyacrylamide-based drag reducers and fluid-loss control agents.

This material is supplied under REACH registration and is handled in compliance with EU GHS classification requirements. It is available as a 50% aqueous solution, with packaging formats typically including IBC containers and bulk tanker delivery for industrial volumes.