2-Acrylamido-2-methylpropanesulfonic acid

2-Acrylamido-2-methylpropanesulfonic acid (CAS 15214-89-8), commonly abbreviated as AMPS monomer, is a reactive sulfonic acid monomer available under trade references including Lubrizol AMPS and Labotest-BB LT00012662. It carries no assigned E-code and is classified under HS code 29241900.

In water treatment, AMPS copolymerizes with acrylic acid or acrylamide to produce scale-inhibiting and dispersant polymers that resist hydrolysis across a broad pH range. In personal care and textile formulations, it functions as a rheology modifier by introducing hydrophilic sulfonate groups into polymer backbones, improving thickening performance under electrolyte stress.

AMPS monomer is supplied as a white crystalline powder and in aqueous solution grades. It is registered under REACH and handled in compliance with EU GHS classification requirements. Buyers should confirm grade specification, concentration, and packaging format directly with the supplier, as options vary by application.