Description

Trimethylsiloxytrichlorosilane is a highly reactive organosilicon compound that serves as a critical building block in advanced silicone chemistry. Its unique structure, featuring both hydrolyzable trichlorosilane and inert trimethylsiloxy groups, makes it an essential precursor for creating custom siloxane polymers and functionalized surfaces. This chemical is particularly valuable for manufacturers in the silicone, electronics, and specialty materials sectors seeking to engineer specific material properties such as hydrophobicity, adhesion, or thermal stability.

Application

• Silicone Intermediate: A key monomer for the synthesis of specialized silicone resins, fluids, and elastomers with tailored properties.
• Surface Modification Agent: Used to impart hydrophobic or oleophobic characteristics to glass, silica, metals, and other inorganic surfaces.
• Coupling Agent/Crosslinker: Functions as a bridging molecule in composite materials, enhancing the bond between organic polymers and inorganic fillers.
• Electronics & Semiconductor Manufacturing: Employed in the production of dielectric coatings, encapsulation materials, and as a precursor in chemical vapor deposition (CVD) processes.
• Adhesive & Sealant Formulations: Acts as an adhesion promoter and moisture-cure crosslinker in high-performance silicone-based adhesives and sealants.
• Pharmaceutical & Agrochemical Intermediates: Serves as a protected silanol synthon or silylating agent in the synthesis of active ingredients.

Basic Information

Product Name	Trimethylsiloxytrichlorosilane
CAS No.	2750-45-0
Molecular Formula	C3H9Cl3OSi2
Molecular Weight	223.54 g/mol
Synonyms	Trichloro(trimethylsiloxy)silane; (Trimethylsilyloxy)trichlorosilane; Silane, trichloro(trimethylsiloxy)-; Trichlorosilyloxytrimethylsilane; Trimethylsilyl trichlorosilicate; TMSOTCS; O-Trimethylsilyl trichlorosilicate
EINECS	220-396-0

Quality Control

Our Trimethylsiloxytrichlorosilane is manufactured under strict process controls to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical techniques including gas chromatography (GC), nuclear magnetic resonance (NMR), and Karl Fischer titration. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment, ensuring full traceability and compliance with your material specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat and incompatible materials. Due to its hygroscopic and moisture-sensitive nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis and degradation. Recommended storage temperature is 2-8°C for long-term stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Chlorosilane Content	≥ 98.0%
Water Content (KF)	≤ 0.1%
Density (at 20°C)	1.18 - 1.22 g/mL
Refractive Index (n20D)	1.410 - 1.415

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