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| Synonyms:ALS/SAS Allylsulfonic acid sodium salt Sodium 2-propene-1-sulfonate Sodium prop-2-ene-1-sulfonate Sodium allyl sulfonate Molecular Formula:C3H5SO3NA Molecular Weight: 144.12 HS Code: 2904100000 Grade: Industrial grade 95% Hazard Class:General Cargo | |||||||||
2495-39-8
bosschemical
2495-39-8
Sodium allyl sulfonate (SAS) is a water-soluble, polymerizable sulfonate monomer with the formula CH₂=CHCH₂SO₃Na — a reactive allylic double bond on one end and a sulfonate salt on the other. That combination makes it one of the most versatile performance monomers of industrial chemistry: a brightener component of nickel plating, a functional monomer of polycarboxylate superplasticizers, and a dye-site comonomer of acrylic fiber.
Because it copolymerizes readily in water with acrylates, acrylamide and maleic systems, SAS grafts sulfonate functionality into polymers that need dispersion, scale inhibition or dye receptivity. Its markets span electroplating, construction chemicals, synthetic fibers, water treatment and oilfield drilling — one small monomer, five substantial industries.
A single monomer, four core value propositions:
Nickel Plating Brighteners:
● a primary brightener component of nickel plating baths, improving brightness, leveling and ductility;
Concrete Superplasticizer Monomers:
● a functional monomer of polycarboxylate superplasticizers (PCE) for high-range water reduction;
Acrylic Fiber & Polymer Monomers:
● the dye-site third monomer of acrylic fiber and a sulfonated comonomer for emulsion and specialty polymers;
Water Treatment & Oilfield:
● a comonomer for scale-inhibiting, dispersing and drilling-fluid polymers.
Item | Specification |
Chemical Name | Sodium allyl sulfonate (Sodium 2-propene-1-sulfonate) |
Synonyms | SAS; ALS; Allylsulfonic acid sodium salt; Sodium allylsulfonate; 3-Sulfopropene sodium salt |
CAS No. | 2495-39-8 |
EC No. (EINECS) | 219-676-5 |
Molecular Formula | C₃H₅NaO₃S (CH₂=CHCH₂SO₃Na) |
Molecular Weight | 144.13 g/mol |
Solubility | Freely soluble in water |
SAS combines two functional groups in one small molecule: the allylic double bond (CH₂=CHCH₂–) participates in free-radical polymerization, while the sodium sulfonate group (–SO₃Na) is strongly hydrophilic and anionic. Copolymerizing SAS into a polymer therefore introduces water solubility, negative charge and dispersion power — the properties that give plating baths their brightening action, concrete admixtures their dispersing action, and acrylic fiber its dye sites.
4. Key Features & Benefits
● Dual-function monomer: polymerizable allyl double bond plus hydrophilic sulfonate in one molecule.
● Water-soluble and anionic: introduces charge and dispersing power into copolymers and baths.
● Proven nickel-brightener value: a standard primary brightener component for bright, level, ductile nickel deposits.
● Polycarboxylate chemistry: functional comonomer of PCE superplasticizers with high water reduction and low dosage.
● Fiber dye-site monomer: the classic third monomer improving dyeability of acrylic fiber.
● Copolymer compatibility: copolymerizes readily with acrylates, acrylamide, maleates and allyl ethers.
1 Nickel Plating Brighteners (Core Application)
SAS is a standard component of nickel electroplating chemistry:
● Primary brightener: combines with saccharin, propargyl sulfonates and pyridine derivatives in bright-nickel formulations;
● Deposit quality: improves brightness, leveling, ductility and metal distribution of the nickel layer;
● Anti-pitting action: reduces pitting in nickel, copper and zinc plating baths;
● Formulation base: the sulfonate workhorse of commercial nickel brightener packages (patent-verified compositions).
2 Concrete Superplasticizer Monomers
● PCE functional monomer: copolymerizes with acrylic acid and allyl polyethers into polycarboxylate superplasticizers;
● High-range water reduction: enables low-dosage, high-slump, non-bleeding concrete admixtures;
● Dispersion performance: sulfonate charge disperses cement particles for workable, high-strength concrete.
3 Acrylic Fiber & Polymer Monomers
● Acrylic fiber third monomer: the dye-site comonomer that gives acrylic fibers their dyeability;
● Emulsion polymerization: sulfonated comonomer stabilizing latexes and improving adhesion;
● Specialty copolymers: functional monomer for water-soluble and responsive polymers.
4 Water Treatment & Oilfield Applications
● Scale inhibitors: acrylate–SAS copolymers for scale and dispersion control in cooling and boiler water;
● Drilling fluids: filtration-control and viscosity polymers with high temperature and salt tolerance;
● Textile and process aids: dispersing and leveling polymers for industrial processing.
Packaging (customizable):
● 25 kg woven bag with PE liner, 25 kg fiber drum, or 500 kg – 1,000 kg FIBC (powder);
● 200 kg HDPE drum, 1,000 L IBC (solution);
Storage:
● Keep in a cool, dry, well-ventilated area away from direct sunlight and heat;
● Keep containers tightly closed to prevent moisture pick-up and caking (powder); protect solutions from freezing;
● Store away from strong oxidizers and polymerization initiators;
● Recommended storage temperature 5 °C – 35 °C.
● Factory-direct supply: own production capacity, transparent pricing, no middleman markup;
● Stable quality: strict internal control, every batch tested, COA with every shipment;small trial orders accepted.
● Export experience: familiar with sea/air shipping documentation for chemical commodities, complete paperwork support;
SAS is used as a primary brightener component of nickel electroplating baths; as a functional monomer of polycarboxylate superplasticizers for concrete; as the dye-site third monomer of acrylic fiber; and as a sulfonated comonomer for water-treatment scale inhibitors and oilfield drilling-fluid polymers.
In bright-nickel formulations, SAS works as a primary (sulfur-containing) brightener: it refines the nickel crystal structure, improves brightness and leveling, increases deposit ductility and helps prevent pitting. It is typically combined with saccharin, propargyl-sulfonate carriers and pyridine derivatives to produce full-bright nickel coatings — a composition documented in commercial and patent formulations.
Powder (≥ 98%) is economical to ship and store and is dissolved on site; 25% and 35% solutions are ready to dose directly into plating baths or polymer reactors. For continuous plating operations, solution avoids dissolving steps; for logistics, powder is usually cheaper. We supply both forms.
SAS is irritating to the skin, eyes and respiratory tract, and the powder should be handled with dust protection; toxicological reviews advise caution with chronic exposure. Use gloves, goggles and adequate ventilation, avoid inhalation and skin contact, and keep it away from polymerization initiators. It is an industrial chemical, not a food ingredient.
