Description

1,3-Bis(Chloromethyl)-1,1,3,3-Tetramethyldisiloxane is a versatile bifunctional organosilicon compound featuring reactive chloromethyl groups. This chemical is a crucial intermediate for the synthesis of advanced silicone polymers and functional materials, valued for its ability to introduce reactive sites into polymer backbones. It is primarily sought after by manufacturers in the silicone elastomer, resin, and specialty chemical industries for creating cross-linked networks, adhesion promoters, and custom siloxane structures.

Application

• Silicone Polymer Modification: Key monomer for introducing reactive chloromethyl functionalities into polysiloxane chains for subsequent cross-linking or further chemical modification.
• Adhesion Promoter Synthesis: Serves as a precursor for manufacturing silane coupling agents that enhance bonding between organic polymers and inorganic surfaces like glass or metals.
• Cross-linking Agent: Used in the production of heat-cured silicone rubbers (HCR) and liquid silicone rubbers (LSR) to form durable, three-dimensional networks.
• Specialty Resin Intermediate: Employed in synthesizing silicone resins with tailored properties for coatings, encapsulants, and release agents.
• Pharmaceutical & Agrochemical Intermediates: Acts as a building block for creating functionalized siloxanes used in more complex active ingredients or delivery systems.
• Surface Treatment: Used to create hydrophobic or oleophobic coatings on various substrates after appropriate chemical conversion.

Basic Information

Item	Detail
Product Name	1,3-Bis(Chloromethyl)-1,1,3,3-Tetramethyldisiloxane
CAS No.	2362-10-9
Molecular Formula	C6H16Cl2OSi2
Molecular Weight	219.27 g/mol
Synonyms	1,3-Bis(chloromethyl)tetramethyldisiloxane; Bis(chloromethyl)tetramethyldisiloxane; Tetramethyl-1,3-bis(chloromethyl)disiloxane; 1,3-Di(chloromethyl)-1,1,3,3-tetramethyldisiloxane; Chloromethyl-functional disiloxane; BCMDS; (Chloromethyl)dimethylsiloxane dimer
EINECS	219-112-5

Quality Control

Our 1,3-Bis(Chloromethyl)-1,1,3,3-Tetramethyldisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and titration methods, to ensure high purity and consistent performance. 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 room temperature (15-25°C/59-77°F). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent hydrolysis. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	1.05 - 1.10 g/cm³
Refractive Index (n20D)	1.430 - 1.440
Chlorine Content	31.0 - 33.0 %
Water Content (KF)	≤ 0.1%

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