Description

3-(Trihydroxysilyl)-1-Propanesulfonic Acid Sodium Salt is a versatile organosilicon sulfonate compound that serves as a key functional monomer and surface modifier. Its unique bifunctional structure, featuring both reactive silanol groups and a hydrophilic sulfonate moiety, provides exceptional value for creating stable, charged interfaces and enhancing material compatibility. This product is essential for manufacturers and R&D teams in the specialty chemicals, advanced materials, and surface treatment industries seeking to improve adhesion, dispersion, and ionic functionality.

Application

• Surface Modification Agent: Used to impart a permanent negative charge and enhance hydrophilicity on glass, silica, metal oxides, and other inorganic surfaces.
• Polymer & Composite Additive: Functions as a reactive monomer or coupling agent in silane-based polymers, hydrogels, and composite materials to introduce sulfonate groups for ion-exchange capacity or improved water dispersion.
• Chromatography & Analytical Chemistry: Employed in the preparation of stationary phases for ion-exchange chromatography or capillary coatings in electrophoresis to modify surface charge and reduce analyte adsorption.
• Antistatic & Conductive Coatings: A key component in formulations for antistatic coatings on plastics, films, and electronic components due to its ionic conductivity.
• Biomaterial Functionalization: Used to modify biomedical device surfaces, nanoparticles, or diagnostic substrates to improve biocompatibility, reduce fouling, and enable subsequent biomolecule conjugation.
• Dispersant & Stabilizer: Acts as a grinding aid and dispersant for inorganic pigments and fillers in aqueous systems, improving stability and preventing agglomeration.

Basic Information

Product Name	3-(Trihydroxysilyl)-1-Propanesulfonic Acid Sodium Salt
CAS No.	70942-25-5
Molecular Formula	C3H9NaO6SSi
Molecular Weight	224.23 g/mol
Synonyms	Sodium 3-(trihydroxysilyl)-1-propanesulfonate; (3-Sulfopropyl)trimethoxysilane sodium salt (hydrolyzed); 1-Propanesulfonic acid, 3-(trihydroxysilyl)-, sodium salt; SIT 8378.5; SIT 8378.0; SIP 6729.2; 3-(Trimethoxysilyl)-1-propanesulfonic acid sodium salt (hydrolysis product); Sodium trimethylsilylpropanesulfonate (related form)
EINECS	Contact for details

Quality Control

Our 3-(Trihydroxysilyl)-1-Propanesulfonic Acid Sodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency, purity, and performance. We provide comprehensive Certificates of Analysis (COA) with key parameters including assay, impurity profile, and solution clarity. Our quality commitment supports applications requiring high-purity intermediates and reliable material performance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to minimize exposure to atmospheric moisture and carbon dioxide, which can affect product stability and performance.

Specification

Item	Specification
Appearance	White to off-white powder or viscous solution
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 95.0%
pH (in solution)	6.0 - 8.0
Water Content (KF)	≤ 5.0%
Chloride (Cl)	≤ 0.1%
Sulfate (SO4)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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