Description

2,2,10,10-Tetramethyl-6-[(Trimethylsilyl)Oxy]-3,9-Dioxa-2,10-Disilaundecane is a specialized organosilicon compound, CAS NO 74685-20-4, valued for its role as a versatile silylating agent and protecting group in advanced organic synthesis. Its molecular architecture, featuring multiple silyl ether linkages, provides exceptional reactivity and selectivity, making it a critical reagent for modifying sensitive functional groups. This high-purity intermediate is essential for R&D and production in the pharmaceutical, agrochemical, and advanced materials sectors, where precise molecular control is paramount.

Application

• Pharmaceutical Synthesis: As a key protecting group for alcohols and polyols during the multi-step synthesis of complex drug molecules and active pharmaceutical ingredients (APIs).
• Agrochemical Manufacturing: Used in the production of advanced pesticides and herbicides where selective silylation improves yield and purity.
• Polymer & Material Science: Serves as a monomer or cross-linking agent in the development of specialty silicones and silicon-based polymers with tailored properties.
• Organic Synthesis Reagent: A crucial tool in academic and industrial laboratories for the protection of hydroxyl groups, enabling complex reaction sequences.
• Surface Modification: Applied in the functionalization of silica and other inorganic surfaces to alter hydrophobicity and reactivity.
• Electronics & Semiconductor: Potential use in precursor formulations for thin-film deposition and as a dielectric material component.

Basic Information

Product Name	2,2,10,10-Tetramethyl-6-[(Trimethylsilyl)Oxy]-3,9-Dioxa-2,10-Disilaundecane
CAS No.	74685-20-4
Molecular Formula	C13H32O3Si3
Molecular Weight	320.66 g/mol
Synonyms	1,3-Bis(trimethylsiloxy)-1,1,3,3-tetramethyldisiloxane; 1,3-Bis[(trimethylsilyl)oxy]-1,1,3,3-tetramethyldisiloxane; Bis(trimethylsiloxy)tetramethyldisiloxane; Tetramethyl-1,3-bis(trimethylsiloxy)disiloxane; 1,1,3,3-Tetramethyl-1,3-bis(trimethylsiloxy)disiloxane; Disiloxane, 1,3-bis[(trimethylsilyl)oxy]-1,1,3,3-tetramethyl-; TMS-protected disiloxane diol
EINECS	Contact for details

Quality Control

Our 2,2,10,10-Tetramethyl-6-[(Trimethylsilyl)Oxy]-3,9-Dioxa-2,10-Disilaundecane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, HPLC, and NMR, to ensure high purity and consistency suitable for demanding synthetic applications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles 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, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20/D)	1.3900 - 1.3950
Density (20°C)	0.88 - 0.92 g/mL

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