Monomers & Building Blocks REACH

Sodium methallylsulfonate

CAS Number

1561-92-8

EC Number

216-341-5

Abbreviation

SMAS

Industries: Plastics & Polymers Textiles, Leather & Paper Water & Wastewater Treatment

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What is Sodium methallylsulfonate?

Sodium methallylsulfonate (CAS 1561-92-8), abbreviated SMAS, is a reactive sulfonate monomer used as a functional comonomer in polymer synthesis.

Where is Sodium methallylsulfonate used?

Water treatment: copolymerized into scale inhibitors and dispersants that prevent mineral deposition in cooling towers
Textile and paper processing: SMAS-based polymers improve dye uptake and fiber affinity
Paper manufacturing: improves surface sizing performance
Plastics and polymers: incorporated into acrylic and vinyl copolymers to enhance colloidal stability
Leather processing: SMAS-derived polymers serve as retanning and dispersing agents
It introduces anionic sulfonate groups into polymer backbones.

Commercial specifications

Standard concentrations
Bulk quantities; bags to intermediate bulk containers

Other Names (Synonyms)

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What are the physical properties of Sodium methallylsulfonate?

Melting Point >300 °C(lit.)

Density 1.59[at 20℃]

Color White to Almost white

Form powder to crystal

Water Solubility 523g/L at 20℃

Vapor Pressure 0Pa at 20℃

Log P -3.74 at 20℃

How is Sodium methallylsulfonate classified and handled safely? Learn More

Warning

GHS07· Irritant

Hazard Statements

H315 Causes skin irritation

H317 May cause an allergic skin reaction

H319 Causes serious eye irritation

H335 May cause respiratory irritation

Precautionary Statements

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P264 Wash … thoroughly after handling.

P271 Use only outdoors or in a well-ventilated area.

P272 Contaminated work clothing should not be allowed out of the workplace.

Which trade and regulatory codes apply to Sodium methallylsulfonate?

HS Code 2904.10.5000

Storage Class 11 - Combustible Solids

WGK (Germany) 1