Description

3-Isothiocyanatopropyltriethoxysilane is a bifunctional organosilane coupling agent containing both a reactive isothiocyanate group and hydrolyzable ethoxysilane groups. This unique structure enables it to act as a powerful chemical bridge, forming strong covalent bonds between inorganic substrates and organic polymers or coatings. It is essential for manufacturers seeking to enhance adhesion, mechanical strength, and durability in composite materials. Key industries that utilize this advanced silane include specialty adhesives & sealants, advanced composites, and surface treatment technologies.

Application

• Adhesion Promoter in epoxy, polyurethane, and acrylic-based adhesives and sealants for demanding industrial applications.
• Surface Modification Agent for glass fibers, minerals, and metal oxides to improve compatibility and bonding with polymer matrices.
• Coupling Agent in fiber-reinforced plastics (FRP) and mineral-filled composites to enhance interfacial strength and moisture resistance.
• Primer Formulation for coatings on glass, metals, and ceramics to ensure long-lasting adhesion under harsh environmental conditions.
• Rubber Reinforcement agent in silica-filled tire tread and industrial rubber goods to improve filler dispersion and reduce hysteresis.
• Immobilization Linker in the preparation of chromatographic media or bioactive surfaces for diagnostic and research applications.

Basic Information

Product Name	3-Isothiocyanatopropyltriethoxysilane
CAS No.	58698-89-8
Molecular Formula	C10H21NO3SSi
Molecular Weight	263.43 g/mol
Synonyms	Triethoxy(3-isothiocyanatopropyl)silane; 3-(Triethoxysilyl)propyl isothiocyanate; Isothiocyanatopropyltriethoxysilane; Silane A-1310; SIT 8187.0; 3-Isothiocyanatopropyltriethoxysilane; (3-Isothiocyanatopropyl)triethoxysilane; NSC 334228
EINECS	261-448-3

Quality Control

Our production of 3-Isothiocyanatopropyltriethoxysilane adheres to stringent quality management protocols. Every batch is analyzed using advanced techniques including GC, HPLC, and FTIR to ensure consistent purity and performance. A comprehensive Certificate of Analysis (COA) detailing assay, identity, and impurity profiles is provided with each shipment, ensuring full traceability and compliance with your material specifications.

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 product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed and under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.445 - 1.455
Density (20°C)	1.05 - 1.10 g/mL

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