Description

Octaethylcyclotetrasiloxane is a high-purity organosilicon compound belonging to the cyclosiloxane family. This specialty chemical serves as a valuable intermediate and functional additive in advanced material synthesis, offering unique properties derived from its cyclic structure and ethyl substituents. It is essential for manufacturers and R&D laboratories in the silicone polymer, electronics, and specialty coatings industries seeking to modify material characteristics such as hydrophobicity, thermal stability, and rheology.

Application

• Silicone Polymer Intermediate: A key building block for the synthesis of custom polysiloxanes and silicone resins with tailored properties.
• Surface Modification Agent: Used to impart hydrophobic and release characteristics to surfaces in coatings and textiles.
• Electronics Industry: Employed as a precursor or additive in dielectric materials, encapsulants, and semiconductor fabrication processes.
• Lubricant & Grease Formulation: Acts as a high-performance base fluid or additive for specialty lubricants requiring thermal and oxidative stability.
• Personal Care & Cosmetics: Functions as a volatile carrier or conditioning agent in hair and skin care formulations.
• Research & Development: Serves as a standard or reagent in organic and organometallic chemistry research.

Basic Information

Product Name	Octaethylcyclotetrasiloxane
CAS No.	1451-99-6
Molecular Formula	C16H40O4Si4
Molecular Weight	416.86 g/mol
Synonyms	1,3,5,7-Tetraethyl-1,3,5,7-tetrahydroxycyclotetrasiloxane; Cyclotetrasiloxane, octaethyl-; Octaethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilecane; 2,2,4,4,6,6,8,8-Octaethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilecane; D4Et; Octaethylcyclotetrasiloxane (mixture of isomers)
EINECS	215-915-5

Quality Control

Our Octaethylcyclotetrasiloxane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment to guarantee compliance with your specifications and industry standards.

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 oxidizing agents, strong acids, and strong bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20/D)	1.430 - 1.440
Density (20°C)	0.95 - 1.00 g/mL

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