Description

Tetraethylcyclotetrasiloxane is a specialized organosilicon compound belonging to the cyclosiloxane family. This chemical serves as a valuable intermediate and functional additive, prized for its unique silicon-oxygen ring structure modified with ethyl groups. It is essential for manufacturers and R&D teams in the advanced materials, electronics, and specialty chemical sectors seeking to modify surface properties, enhance thermal stability, or create novel polymeric systems.

Application

• Silicone Resin & Polymer Intermediate: Acts as a key building block for synthesizing custom silicone resins, elastomers, and copolymers with tailored properties.
• Surface Treatment & Coupling Agent: Used to modify inorganic surfaces (e.g., glass, silica) to improve adhesion, dispersion, and compatibility with organic matrices.
• Electronic Encapsulants & Sealants: Employed in formulations for potting compounds and sealants that require high purity and specific dielectric properties.
• Lubricant & Release Agent Additive: Imparts lubricity and thermal stability as an additive in high-performance greases and mold release agents.
• Personal Care & Cosmetic Ingredients: Functions as a volatile carrier or conditioning agent in hair and skin care formulations.
• Research & Development: Serves as a precise reagent for academic and industrial research in organosilicon chemistry and material science.

Basic Information

Product Name	Tetraethylcyclotetrasiloxane
CAS No.	16066-10-7
Molecular Formula	C8H24O4Si4
Molecular Weight	296.62 g/mol
Synonyms	1,3,5,7-Tetraethyl-1,3,5,7-tetrahydroxycyclotetrasiloxane; Cyclotetrasiloxane, 1,3,5,7-tetraethyl-; Tetraethylcyclotetrasiloxane; D4-Et; Octaethylcyclotetrasiloxane (common name based on ethyl group count); Tetraethyl cyclic tetrasiloxane; 2,4,6,8-Tetraethyl-2,4,6,8-tetraoxa-1,3,5,7-tetrasilacyclooctane
EINECS	240-200-1

Quality Control

Our Tetraethylcyclotetrasiloxane is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and key physical parameters are provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong acids, bases, and oxidizing agents. The container must be kept tightly sealed to prevent moisture absorption.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.390 - 1.410
Density (20°C)	0.95 - 1.05 g/cm³
Water Content (KF)	≤ 0.1%

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