Description

Trihydroxysilylethyl Phenylsulphonic Acid, 25% In Water is a specialized organosilicon sulfonic acid derivative, supplied as a stable aqueous solution for ease of handling and integration. This compound is valued for its dual functionality, combining the surface-modifying properties of a silane with the strong acidic character of an aryl sulfonic acid. It is primarily utilized in advanced material science and industrial chemistry sectors where surface activation, adhesion promotion, and catalytic activity are required.

Application

• Surface Treatment & Coupling Agent: Used to modify glass, silica, and metal oxide surfaces, enhancing the adhesion of polymers, coatings, and composites.
• Catalyst & Acid Catalyst Precursor: Serves as a catalyst or precursor in organic synthesis and polymerization reactions due to its strong acidic sites.
• Adhesion Promoter: Improves bond strength in sealants, adhesives, and rubber-to-metal bonding applications.
• Resin Modification: Incorporated into phenolic, epoxy, or other resin systems to alter curing characteristics and final material properties.
• Textile & Fiber Processing: Acts as a finishing agent or co-catalyst in fiber treatment processes.
• Research & Development: Employed in the development of novel hybrid organic-inorganic materials and functionalized surfaces.

Basic Information

Product Name	Trihydroxysilylethyl Phenylsulphonic Acid, 25% In Water
CAS No.	143282-00-2
Molecular Formula	C8H12O6SSi
Molecular Weight	264.33 g/mol (Acid form)
Synonyms	2-(Trihydroxysilyl)ethylbenzenesulfonic acid; [(2-Sulfoethyl)phenyl]trihydroxysilane; Phenylsulfonylethyltrihydroxysilane; Silane, trihydroxy[2-(phenylsulfonyl)ethyl]-; Benzenesulfonic acid, 2-(trihydroxysilyl)ethyl-; Aqueous silane sulfonic acid solution
EINECS	Contact for details

Quality Control

Our Trihydroxysilylethyl Phenylsulphonic Acid solution is manufactured under a strict quality management system. Every batch is analyzed to ensure consistent concentration, purity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, pH, and clarity are provided and available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area at room temperature (15-25°C). This product is moisture-sensitive (hygroscopic). Keep away from strong bases and oxidizing agents. For long-term storage, consider using under an inert atmosphere to maintain optimal stability.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Assay (as acid)	24.0 - 26.0 % w/w
pH (25°C)	1.0 - 3.0
Identification (IR)	Conforms
Water Content	Balance

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