Description

Tetraoctyl Orthosilicate CAS NO 78-14-8 is a high-purity organosilicon compound, specifically an orthosilicate ester of 2-ethylhexanol. This chemical serves as a versatile intermediate and coupling agent, valued for its ability to modify surfaces and impart hydrophobic properties. It is essential for manufacturers in the coatings, adhesives, and specialty chemical industries seeking to enhance product performance and durability.

Application

• As a key coupling agent and surface modifier in mineral-filled polymer composites and sealants.
• Used in the formulation of water-repellent coatings and treatments for construction materials.
• Acts as a cross-linking agent in silicone-based resins and high-performance adhesives.
• Serves as an intermediate in the synthesis of more complex organosilicon compounds and specialty surfactants.
• Employed as a lubricant additive and in the preparation of release agents for industrial molding processes.
• Utilized in research and development for surface chemistry studies and material science applications.

Basic Information

Product Name	Tetraoctyl Orthosilicate
CAS No.	78-14-8
Molecular Formula	C32H68O4Si
Molecular Weight	544.96 g/mol
Synonyms	Tetra(2-ethylhexyl) Orthosilicate; Tetra(2-ethylhexyl) Silicate; Tetra-2-ethylhexyl Orthosilicate; Tetraoctyl Silicate; Silicic Acid, Tetra(2-ethylhexyl) Ester; Tetra(2-ethylhexyloxy)silane; 2-Ethylhexyl Silicate; TEHOS
EINECS	201-083-8

Quality Control

Our Tetraoctyl Orthosilicate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay and impurity profiling, to ensure it meets precise specifications and consistent performance for industrial applications. Certificates of Analysis (COA) are available upon request to guarantee traceability and compliance with your requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (20°C)	0.88 - 0.90 g/mL
Refractive Index (n20D)	1.440 - 1.445
Water Content (KF)	≤ 0.1%

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