Description

3-Ethylheptamethyltrisiloxane is a specialized organosilicon compound belonging to the class of linear trisiloxanes. This chemical is valued for its unique combination of volatility and compatibility, making it a versatile intermediate and functional fluid. It is primarily sought after by manufacturers in the silicone industry and advanced material science for applications requiring specific rheological and surface properties. The compound is identified by CAS number 17861-60-8.

Application

• As a key intermediate in the synthesis of more complex silicone polymers and copolymers.
• As a volatile carrier or spreading agent in specialty industrial and agricultural formulations.
• As a base fluid or component in high-performance heat transfer fluids and lubricants.
• In the production of silicone-based surfactants and foam control agents.
• As a reactive modifier or endblocker in silicone resin and elastomer manufacturing.
• For research and development in material science, particularly for surface modification studies.

Basic Information

Product Name	3-Ethylheptamethyltrisiloxane
CAS No.	17861-60-8
Molecular Formula	C9H26O2Si3
Molecular Weight	250.56 g/mol
Synonyms	1,1,1,3,5,5,5-Heptamethyl-3-ethyltrisiloxane; Trisiloxane, 3-ethyl-1,1,1,3,5,5,5-heptamethyl-; 3-Ethylheptamethyltrisiloxane; Ethylheptamethyltrisiloxane; MDEM; Linear trisiloxane with ethyl group
EINECS	Contact for details

Quality Control

Our 3-Ethylheptamethyltrisiloxane is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including Gas Chromatography (GC) and NMR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and key physical properties is provided with every shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials such as strong bases. Due to its highly volatile nature, ensure containers are kept tightly sealed when not in use to prevent evaporation and maintain product integrity. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 97.0%
Refractive Index (n20D)	1.390 - 1.395
Density (20°C)	0.85 - 0.87 g/mL

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