Description

Ethyl Silicate is a versatile organosilicon compound, also known as tetraethyl orthosilicate (TEOS), widely used as a critical precursor for silicon dioxide and other inorganic-organic hybrid materials. Its primary value lies in its ability to undergo hydrolysis and condensation reactions, forming stable silica networks essential for coatings, binders, and high-purity glass. This makes it indispensable for industries such as precision investment casting, protective coatings, and electronics. Ethyl Silicate CAS NO 78-10-4 is a fundamental building block in advanced material science and industrial chemistry.

Application

• Precision Investment Casting Binders: As a primary binder for ceramic shells and molds in the lost-wax casting process for aerospace and turbine components.
• Protective and Anti-Corrosion Coatings: Used in zinc-rich paints and silicate-based coatings to provide durable protection for steel structures, bridges, and marine applications.
• Silica Sol-Gel Precursor: Serves as the key starting material for sol-gel synthesis of silica nanoparticles, thin films, aerogels, and monolithic glasses.
• Surface Treatment & Waterproofing: Applied to treat concrete, stone, and masonry to reduce water absorption and improve durability.
• Adhesives and Sealants: A cross-linking agent in high-temperature and chemically resistant adhesive formulations.
• Electronics and Optics: Used in the production of passivation layers, planarization coatings, and optical fibers.
• Catalyst and Catalyst Support: Employed in the preparation of silica-based catalyst supports.
• Chemical Synthesis Intermediate: Acts as an ethylating agent and intermediate in organic and organometallic synthesis.

Basic Information

Product Name	Ethyl Silicate
CAS No.	78-10-4
Molecular Formula	C8H20O4Si
Molecular Weight	208.33 g/mol
Synonyms	Tetraethyl Orthosilicate (TEOS); Ethyl Orthosilicate; Tetraethoxysilane; Silicon Ethoxide; Tetraethyl Silicate; Orthosilicic Acid Tetraethyl Ester; Dynasil A; Silbond Condensed
EINECS	201-083-8

Quality Control

Our Ethyl Silicate is manufactured under stringent process controls to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical methods including Gas Chromatography (GC) and titration to meet industrial-grade and specialized application specifications. Certificates of Analysis (COA) detailing purity, assay, and key physical properties are provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and open flame. Due to its highly volatile nature, keep containers tightly sealed when not in use. Recommended storage temperature is 15-25°C. Keep away from strong acids and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Specific Gravity (20/20°C)	0.932 - 0.936
Refractive Index (n20D)	1.382 - 1.384
Acidity (as HCl)	≤ 0.05%
Water Content	≤ 0.3%

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