Description

Bis(Trimethylsiloxy)Dichlorosilane is a versatile organosilicon compound that serves as a key intermediate in the synthesis of advanced silicone polymers and functional silanes. Its value lies in its bifunctional reactivity, offering both chlorosilane and silyl ether groups for controlled cross-linking and surface modification. This product is essential for manufacturers in the silicone elastomer, specialty coatings, and electronics industries seeking to enhance material properties and process control.

Application

• Silicone Polymer Synthesis: A crucial monomer or chain extender for producing high-performance silicone resins, rubbers, and fluids with tailored mechanical and thermal properties.
• Surface Modification Agent: Used to impart hydrophobic or release characteristics to inorganic fillers, pigments, and glass surfaces, improving compatibility in composite materials.
• Adhesive & Sealant Formulations: Acts as a cross-linking agent and adhesion promoter in silicone-based adhesives, sealants, and potting compounds.
• Electronics Encapsulation: Employed in the production of silicone gels and encapsulants for protecting sensitive electronic components from moisture and stress.
• Pharmaceutical & Cosmetic Intermediates: Serves as a protected silanol precursor or silylating agent in the synthesis of active ingredients and silicone-based personal care additives.
• Research & Development: A valuable building block in organic and organometallic chemistry for constructing complex molecular architectures.

Basic Information

Product Name	Bis(Trimethylsiloxy)Dichlorosilane
CAS No.	2750-44-9
Molecular Formula	C6H18Cl2O2Si3
Molecular Weight	277.37 g/mol
Synonyms	Dichlorobis(trimethylsiloxy)silane; Bis(trimethylsilyloxy)dichlorosilane; Dichlorosilane, bis(trimethylsiloxy)-; 1,1-Dichloro-3,3,5,5-tetramethyl-1,3,5-trisiloxane; Hexamethyldisiloxane dichlorosilane adduct; Silane, dichlorobis(trimethylsiloxy)-; (Trimethylsilyloxy)trichlorosilane dimer
EINECS	220-397-7

Quality Control

Our Bis(Trimethylsiloxy)Dichlorosilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and titration methods, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is 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, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent moisture absorption and decomposition. Keep away from heat, sparks, open flames, and incompatible materials such as strong bases, acids, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Chloride Content (Titration)	25.0 - 26.0 %
Density at 20°C	1.00 - 1.05 g/mL
Refractive Index (n20D)	1.390 - 1.400

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