Description

Tetrahexyl Orthosilicate is a high-purity organosilicon compound, specifically a tetraalkyl orthosilicate ester. This chemical serves as a versatile and effective precursor for introducing silica or silicon-containing functional groups into various materials. It is particularly valued for its role as a cross-linking agent and a source of silicon dioxide in sol-gel processes. Key industries that utilize this product include specialty polymers, advanced ceramics, and surface coatings, where it enhances durability, thermal stability, and adhesion properties.

Application

• Sol-Gel Processing: Acts as a critical silicon alkoxide precursor for synthesizing silica-based glasses, ceramics, and hybrid organic-inorganic materials.
• Polymer Modification & Cross-linking: Used to modify polymer chains and create cross-linked networks in silicone resins and rubbers, improving their mechanical and thermal properties.
• Surface Treatment & Coatings: Applied as a coupling agent or adhesion promoter in protective and functional coatings for metals, glass, and plastics.
• Catalyst & Reagent Synthesis: Serves as a reagent in organic synthesis and as a support material for immobilizing catalysts.
• Electronic Materials: Utilized in the fabrication of dielectric layers, insulating films, and passivation coatings in microelectronics.
• Hydrophobic Agents: Imparts water-repellent characteristics to textiles, construction materials, and paper when used in treatment formulations.

Basic Information

Product Name	Tetrahexyl Orthosilicate
CAS No.	7425-86-7
Molecular Formula	C24H52O4Si
Molecular Weight	432.76 g/mol
Synonyms	Hexyl Orthosilicate; Tetra-n-hexyl Orthosilicate; Tetrahexyl Silicate; Silicic Acid, Tetrahexyl Ester; Tetrahexoxysilane; Orthosilicic Acid Tetrahexyl Ester; Tetrahexyl Ester of Orthosilicic Acid; CAS 7425-86-7
EINECS	231-067-7

Quality Control

Our Tetrahexyl Orthosilicate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay, identity confirmation, and impurity profiling, to ensure it meets precise specifications for industrial and research applications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and test results is provided with every shipment and is available upon request.

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). Keep the container tightly sealed to prevent contact with atmospheric moisture, which can lead to hydrolysis. Store away from incompatible materials such as strong acids and bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	0.88 - 0.92 g/mL
Refractive Index (n20D)	1.430 - 1.440
Water Content (Karl Fischer)	≤ 0.5%

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