Description

5-Ethyl 2,2,8,8-Tetramethyl-5-[[(Trimethylsil)Oxy]Methyl]-3,7-Dioxa-2,8-Disilanonane CAS NO 17940-81-7 is a specialized organosilicon compound, specifically a silane ether derivative, valued for its role as a versatile chemical intermediate and protecting group reagent. Its molecular structure, featuring both ethyl and trimethylsilyloxy methyl groups, makes it a critical building block in advanced organic synthesis, particularly for introducing silicon-based functionalities. This product is essential for R&D and production chemists in the pharmaceutical, agrochemical, and advanced materials sectors who require high-purity, reactive intermediates for complex molecule construction.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly as a protecting group for alcohols or as a precursor for silicon-containing drug candidates.
• Agrochemical Synthesis: Serves as a key intermediate in the production of advanced pesticides, herbicides, and fungicides where silicon moieties enhance biological activity or stability.
• Advanced Material Precursor: Employed in the development of silicone polymers, resins, and hybrid organic-inorganic materials for coatings, electronics, and sealants.
• Crosslinking Agent: Functions in formulations for silicone-based elastomers and rubbers to modify mechanical properties and cure characteristics.
• Surface Modification: Used to treat inorganic surfaces like silica or metals to impart hydrophobic or specific reactive properties.
• Laboratory Reagent: A valuable tool in academic and industrial research for organometallic chemistry and methodology development.

Basic Information

Product Name	5-Ethyl 2,2,8,8-Tetramethyl-5-[[(Trimethylsil)Oxy]Methyl]-3,7-Dioxa-2,8-Disilanonane
CAS No.	17940-81-7
Molecular Formula	C14H34O3Si3
Molecular Weight	346.68 g/mol
Synonyms	1,1,1,3,5,5,5-Heptamethyl-3-[(trimethylsilyloxy)methyl]trisiloxane; 3-[(Trimethylsilyloxy)methyl]-1,1,1,3,5,5,5-heptamethyltrisiloxane; Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyloxy)methyl]-; Heptamethyl[(trimethylsilyloxy)methyl]trisiloxane; (3-((Trimethylsilyloxy)methyl)-1,1,1,3,5,5,5-heptamethyltrisiloxane); TMSO-CH2-Si(Me)2-O-Si(Me)2-O-Si(Me)3
EINECS	Contact for details

Quality Control

Our production of 5-Ethyl 2,2,8,8-Tetramethyl-5-[[(Trimethylsil)Oxy]Methyl]-3,7-Dioxa-2,8-Disilanonane adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including GC, NMR, and Karl Fischer titration, to ensure high purity and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical specifications. Our quality system is designed to meet the demands of cGMP and ISO standards for fine chemical intermediates.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area at a controlled room temperature (15-25°C). Due to its highly volatile nature, ensure containers are securely sealed when not in use and stored away from heat sources and open flame. Keep under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Density (20°C)	0.88 - 0.92 g/cm³
Refractive Index (n20D)	1.400 - 1.410

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