Sodium Methallyl Sulfonate (SMAS, CAS 1561-92-8)
Sodium Methallyl Sulfonate (abbreviated SMAS / MAS) is a vital water-soluble anionic reactive monomer. It contains polymerizable carbon-carbon double bond and hydrophilic sulfonate group, featuring excellent copolymerization performance, high water solubility and thermal stability. Widely adopted in polycarboxylate superplasticizer synthesis, acrylic fiber modification, water treatment polymers, oilfield chemicals and emulsion polymerization. We supply high purity industrial-grade SMAS with stable batch quality, complete export documents and long-term bulk supply capacity.
Basic Chemical Information
| Item | Specification |
|---|---|
| Product Name | Sodium Methallyl Sulfonate (SMAS) |
| CAS Number | 1561-92-8 |
| IUPAC Name | Sodium 2-methylprop-2-ene-1-sulfonate |
| Molecular Formula | C₄H₇NaO₃S |
| Molecular Weight | 158.16 |
| EINECS No. | 216-341-5 |
| Appearance | White to off-white crystalline powder / flakes |
| Solubility | Easily soluble in water; slightly soluble in ethanol |
| Melting Point | ＞270℃ (Decomposition) |
Quality Specifications (Industrial Export Standard)
- Purity (HPLC): ≥99.5%
- Moisture Content: ≤0.5%
- Chloride (Cl⁻): ≤0.03%
- Sulfite: ≤0.02%
- Iron (Fe): ≤0.4 ppm
- Water Insoluble Matter: ≤0.005%
- Aqueous Solution: Clear and transparent
Main Industrial Applications
1. Polycarboxylate Superplasticizer (PCE) Monomer (Largest Application)
SMAS acts as chain transfer agent and functional comonomer for polycarboxylate superplasticizer. It introduces sulfonic groups to improve cement dispersion and slump retention, effectively control polymer molecular weight, reduce odor of finished admixtures, and enhance the workability of concrete and precast components.
2. Third Monomer for Polyacrylonitrile (Acrylic Fiber)
Used as modifying monomer for acrylic fiber. It greatly improves fiber dyeability, heat resistance, softness and spinnability, enabling fibers to absorb dyes evenly and achieve high color fastness.
3. Water Treatment Chemicals
Copolymerized with acrylic acid, acrylamide to produce scale inhibitors and dispersants. Excellent inhibition performance against calcium carbonate, calcium phosphate and sulfate scaling in circulating cooling water systems.
4. Oilfield Chemical Additives
Raw material for high-temperature & salt-resistant polymer fluid loss agents and displacing agents used in tertiary oil recovery.
5. Other Fields
Emulsion polymerization modifier, paint dispersant, papermaking dry strength agent, super absorbent resin and functional polymer synthesis.
Advantages of Our SMAS
- High purity, low impurity, stable quality between batches
- Controllable residual sulfite, avoiding adverse effects on polymerization reaction
- Good free-flow property, low caking risk during transportation and storage
- Stable bulk supply, flexible order from trial sample to full container
- Support full set documents: COA, MSDS, packing list, commercial invoice
- Customized technical indicators according to customer formulation requirements
Packaging & Storage Conditions
- Standard Package: 25kg plastic woven bag with inner PE bag
- Trial Package: 1kg / 5kg small packaging available
- Storage: Keep sealed, store in cool, dry and ventilated warehouse, avoid moisture and direct sunlight
- Shelf Life: 24 months under proper storage
Why Choose Us as Your SMAS Supplier
We are professional manufacturer and exporter of Sodium Methallyl Sulfonate in China. Supported by mature production process and strict laboratory testing system, we provide consistent high-quality SMAS for concrete admixture factories, fiber manufacturers, water treatment chemical enterprises worldwide. We offer competitive factory price, fast delivery and professional technical support for polymerization formulation optimization.
