Description

Ethenesulfonic Acid Ethyl Ester CAS NO 4058-26-8 is a versatile sulfonic acid ester monomer used as a key building block in advanced polymer synthesis. This compound is valued for introducing sulfonate functionality, which imparts desirable properties like hydrophilicity, ionic conductivity, and chemical resistance to polymeric materials. It is primarily sought by R&D chemists and process engineers in the specialty polymer, coatings, and advanced material sectors for developing high-performance products.

Application

• Polymer Modification: As a reactive monomer for copolymerization with acrylates, styrene, or vinyl monomers to create sulfonated polymers.
• Ion-Exchange Membranes: A critical precursor in the synthesis of polymers for proton exchange membranes (PEMs) used in fuel cells and electrolyzers.
• Water-Soluble Polymers: Used to manufacture polymers with enhanced solubility and dispersancy for applications in water treatment and detergents.
• Specialty Coatings & Adhesives: Imparts adhesion promotion and moisture resistance in high-performance coating and adhesive formulations.
• Chemical Intermediate: Serves as an alkylating agent or a precursor for further organic synthesis in pharmaceutical and agrochemical research.
• Hydrogel Production: Employed in the synthesis of superabsorbent or stimuli-responsive hydrogels for biomedical and personal care applications.

Basic Information

Product Name	Ethenesulfonic Acid Ethyl Ester
CAS No.	4058-26-8
Molecular Formula	C4H8O3S
Molecular Weight	136.17 g/mol
Synonyms	Ethyl ethenesulfonate; Ethyl vinylsulfonate; Vinylsulfonic acid ethyl ester; Ethenesulfonic acid, ethyl ester; Ethyl ethylene sulfonate; 2-Sulfoethyl acrylate (related); Ethanesulfonic acid, vinyl ester; NSC 88212
EINECS	223-757-1

Quality Control

Our production of Ethenesulfonic Acid Ethyl Ester adheres to stringent internal quality protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed via GC, HPLC, and NMR to confirm identity and assay, with strict control over moisture and related substance content. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (GC)	≤ 1.0% (total)
Density (at 20°C)	~1.20 g/mL

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.