Product Identity

- Chemical name: 2-Acrylamido-2-Methylpropane Sulfonic Acid

- Abbreviation: AMPS; ATBS

- CAS No.: 15214-89-8

- EINECS No.: 239-268-0

- Molecular formula: C₇H₁₃NO₄S

- Appearance: white crystalline powder or granule

- Purity: ≥ 99.00 % (m/m) (typ. 99.29 %)

- Melting point: ≥ 185 °C (decomp. 187.1 °C)

- Colour (25 % aq.): ≤ 20 Co-Pt

- Fe: ≤ 5 ppm (typ. 0.6 ppm)

- Water: ≤ 0.5 % (m/m) (typ. 0.09 %)

- Acid value: 270–280 mg KOH/g (typ. 271.12)

- Residual acrylamide: ≤ 999 ppm (typ. 650 ppm)

- Non-volatile matter: ≥ 99.0 % (m/m) (typ. 99.65 %)

- Solubility: soluble in water, insoluble in acetone; aq. solution is acidic

- Polymerisation: can be homo-polymerised and co-polymerised with acrylamide, acrylic acid, 
acrylonitrile, N-vinyl pyrrolidone, etc. 

Key Characteristics

- High reactivity & hydrophilicity

- Thermal & hydrolytic stability (stable ≥ 180 °C)

- Excellent Ca²⁺ / Mg²⁺ tolerance

- REACH-registered; ISO 9001 / 14001 / 45001 certified

Performance Benefits

- High-performance monomer for water-soluble polymers

- Versatile co-monomer enabling tailor-made performance

- Sustainable—reduces environmental impact of formulated products 

Application Profiles 
4.1 Water Treatment (≈ 1/3 of global consumption)

- Scale & corrosion inhibitor, dispersant, flocculant aid

- Cooling towers, boilers, RO membranes, municipal & industrial waste water 

4.2 Oilfield

- Drilling-fluid thinner, fluid-loss reducer, rheology modifier

- Cement retarder / fluid-loss additive (ternary AMPS/MAA/AM systems)

- EOR thickener, fracturing & acidising gelling agent, drag reducer

- Produced-water treatment demulsifier 
4.3 Paper Making

- Dry-/wet-strength enhancer, retention & drainage aid

- Coating colour dispersant for CaCO₃ / kaolin; dryer-release improver 
4.4 Textile & Acrylic Fibre

- Third monomer (1–4 % on fibre) → higher whiteness, dye uptake, antistatic & 
flame-retardant properties, moisture absorption close to natural wool 
4.5 Coatings & Adhesives

- Cross-linking promoter for water-borne thermosetting & cathodic electro-deposition coatings 
→ improved gloss, hardness, water & salt-spray resistance

- Pressure-sensitive & construction adhesives—enhanced cohesion & water resistance 
4.6 Construction & Super-absorbent Materials

- Concrete dispersant / early-strength agent (graft with Ca-lignosulfonate & AM)

- SAP co-monomer—absorbency 400–800 g g⁻¹ (DI water) 
4.7 Personal Care & Pharmaceuticals

- Thickener / humectant for creams, lotions, hair gels

- Hydrogel drug-delivery matrices, sustained-release carriers, biomedical materials 
4.8 Emerging Uses

- Magnetic-nanoparticle dispersant, conductive hydrogels, artificial cartilage, wound dressings