Sodium polymethacrylate

CAS Number
54193-36-1
EC Number
611-109-3

What is Sodium polymethacrylate?

Sodium polymethacrylate (CAS 54193-36-1) is a water-soluble anionic polymer used in industrial processing and formulation.

Where is Sodium polymethacrylate used?

  • Water treatment: scale inhibitor and dispersant of suspended solids in cooling towers, boilers and industrial water circuits
  • Construction: workability improver in cement and gypsum formulations, reducing water demand without compromising set strength
  • Textile and paper processing: coating viscosity control and pigment dispersion
  • Home care and industrial cleaning: sequestrant and anti-redeposition agent that keeps soils suspended during the wash cycle
  • It functions as a dispersant, scale inhibitor and rheology modifier in aqueous systems.

Good to know: Grades are differentiated primarily by molecular weight, which affects dispersancy versus thickening performance. Buyers should confirm the molecular weight range and active content with suppliers.

Commercial specifications

  • Aqueous solution, solids content typically 30% to 45%

Other Names (Synonyms)

Poly(methacrylic acid sodium salt)|2-Propenoic acid, 2-methyl-, homopolymer, sodium salt|Vinamul N 3311|Comet|Sodium polymethacrylic acid

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What are the physical properties of Sodium polymethacrylate?

Boiling Point 160.5 °C
Density 1.1 g/cm³
Flash Point 74.2 °C
Appearance solid
Odor Odorless
Form 30% Solids in water (Unit weight includes weight of solvent.)
Refractive Index n 20/D 1.401
pH 8-9

Which trade and regulatory codes apply to Sodium polymethacrylate?

Storage Class 10 - Combustible liquids
WGK (Germany) 3
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