Product Name: Sodium Methallyl Sulfonate(SMAS/MAS)
Molecular Formula: C4H7SO3Na
CAS NO.: 1561-92-8
Structural Formula:

Molecular Weight: 158.156
Physical and Chemical Properties:
270℃-280℃ are dissolving in water, but dissolving difficultly in alcohol ;Strong oxidant, decomposed into carbon monoxide, carbon dioxide and hydrogen sulfide etc, poisonous gases.
Index:
Analysis Items | Index | Analysis Items | Index |
Aqueous Solution | Transparent | Sodium Sulfite | ≤0.02% |
Content | >99.5% | Moisture | ≤0.5% |
Cl-(Chloride) | ≤0.035% | Color | ≤10 |
Fe2+(Iron) | ≤0.4ppm |
Functions:
1) Sodium Methallyl Sulfonate can be used as a high-powered water reducer of polycarboxylic acid to low the water added of products and retard well.
2) As a monomer of corrosion and scale inhibitors, it can be used in water treatment chemicals. It can polymerize with acrylic acid, acrylamide, maleic anhydride, sodium hypophosphite and has good scale inhibition effects for calcium phosphate, zinc salts, carbonate calcium and calcium sulfate.
3) As an oil field chemical, it can polymerize with acrylamide, acrylic acid, sodium humate, acrylamido propyl trimethyl ammonium chloride, acrylamido-ethyl-2-methyl ammonium chloride, diethyl diallyl ammonium chloride, allyl trimethyl ammonium chloride to be dispersants, fluid loss agent and have remarkable effect in anti-high temperature and salt.
4)As the third monomer of acrylic fiber, Sodium Methallyl Sulfonate can improve the dyeing properties, the heat resistance and flexibility of fibers, so they can absorb color fast and have strong fastness and bright color.
5) As a paint additive, tihs product can be used to produce thermosetting acrylic resin and coating dispersant to increase the water-solubility.
6) As a monomer of flocculant, Sodium Methallyl Sulfonate can polymerize with acrylamide.
7) This product can polymerize with methyl acrylic acid, itaconic acid to be a dispersant.
8) Sodium Methallyl Sulfonate can be used to make CPPL and high water-absorbing resin in electronics and materials processing.
9) This product can polymerize with sodium acrylate, styrene-acrylic emulsion, polyvinyl alcohol to improve fertilizer about red soil and strengthen absorb ammonium ion, nitrateion.
10) It can be used for the third oil displacement agent.
11) As one dry strength agent of papermaking additives, This product can improve the quality of the paper.
Packing:
20kg/bag in a PP woven bag with PE inner liner; 500kg/bag; or according to the user’s request . 15tons/20’GP with pallets .
Attentions:
1) This product is hazardous to health, prevent ingestion of this product.
2) Rain proof, wet proof and resistant of the exposure to sunlight when transportation.
3) Be store in a dry and cool place.Expiration: one year .





Sodium Methallyl Sulfonate (SMS) is an organic compound with the chemical formula C₄H₇NaO₃S. It is the sodium salt of methallyl sulfonic acid and is commonly used in industrial applications, particularly as a monomer or comonomer in polymerization reactions.
Key Properties:
- Molecular Formula: C₄H₇NaO₃S
- CAS Number: 1561-92-8
- Appearance: White crystalline powder
- Solubility: Highly soluble in water
- Reactivity: Contains a reactive vinyl (allylic) group and a sulfonate group, making it useful in copolymerization.
Applications:
- Polymer Industry:
- Used as a comonomer in the production of water-soluble polymers and superabsorbent polymers (SAPs).
- Improves the hydrophilic properties of polymers.
- Used in acrylic fiber modification and latex production.
- Textiles & Dyes:
- Acts as a reactive intermediate in dye synthesis.
- Enhances dyeability and moisture absorption in fabrics.
- Adhesives & Coatings:
- Incorporated into aqueous adhesives and coatings to improve water resistance and adhesion.
- Oilfield Chemicals:
- Used in water-soluble drilling fluids and enhanced oil recovery (EOR) processes.
- Personal Care Products:
- Sometimes used in hair care and skin care formulations due to its sulfonate group, which enhances solubility and stability.
Synthesis:
Sodium Methallyl Sulfonate is typically synthesized by the sulfonation of methallyl chloride followed by neutralization with sodium hydroxide (NaOH):
- Methallyl chloride + Sodium sulfite → Methallyl sulfonic acid
- Neutralization with NaOH → Sodium Methallyl Sulfonate
Safety & Handling:
- Generally considered low toxicity but should be handled with care.
- Avoid inhalation of dust and direct skin contact.
- Store in a cool, dry place away from strong oxidizers.
Related links
- Sodium Methallyl Sulfonate (SMAS) in Fiber and Plastic Modification: Mechanisms, Applications, and Safety Considerations
- Advanced Applications of Sodium Methallyl Sulfonate in Water Treatment Systems: Mechanisms, Operational Protocols, and Safety Considerations
- Sodium Methallyl Sulfonate in Water Treatment: Mechanisms, Applications, and Operational Guidelines
- Application of Sodium Methallyl Sulfonate in Oilfield Chemistry: Principles, Case Studies, and Safety Guidelines
- Sodium Methallyl Sulfonate: Properties, Production, Applications, and Safety Considerations
- What is sodium methallyl sulfonate used for?
- Sodium Methallyl Sulfonate (SMAS) – Detailed Technical Description
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