Description

1,3-Bis(Dichloromethyl)-1,1,3,3-Tetramethyldisiloxane is a versatile organosilicon compound featuring reactive chloromethyl groups on a disiloxane backbone. This structure makes it a valuable key intermediate and functional monomer for synthesizing advanced silicone polymers and hybrid materials. It is primarily used by R&D chemists and production specialists in the silicone, pharmaceutical, and specialty chemical industries seeking to introduce specific functionalities into their products.

Application

• Silicone Polymer Modification: Acts as a functional monomer or cross-linking agent to introduce chloromethyl groups into silicone resins, rubbers, and fluids, altering their physical and chemical properties.
• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of active pharmaceutical ingredients (APIs) and other bioactive molecules that require specific siloxane-based architectures.
• Surface Treatment Agent: Used to modify inorganic surfaces (e.g., silica, glass) to impart hydrophobicity, improve adhesion, or create reactive sites for further chemical grafting.
• Specialty Chemical Synthesis: A crucial precursor for creating custom silane coupling agents, dendrimers, and other complex organosilicon compounds for research and industrial applications.
• Adhesive & Sealant Formulation: Incorporated into formulations to enhance curing characteristics, thermal stability, or chemical resistance of the final adhesive or sealant product.
• Hybrid Material Production: Used in sol-gel processes to create organic-inorganic hybrid materials with tailored mechanical, optical, or electronic properties.

Basic Information

Item	Details
Product Name	1,3-Bis(Dichloromethyl)-1,1,3,3-Tetramethyldisiloxane
CAS No.	2943-70-6
Molecular Formula	C6H14Cl4OSi2
Molecular Weight	284.07 g/mol
Synonyms	1,3-Bis(chloromethyl)-1,1,3,3-tetramethyldisiloxane; Tetramethyl-1,3-bis(chloromethyl)disiloxane; 1,3-Di(chloromethyl)-1,1,3,3-tetramethyldisiloxane; Bis(chloromethyl)tetramethyldisiloxane; 1,1,3,3-Tetramethyl-1,3-bis(chloromethyl)disiloxane; Disiloxane, 1,3-bis(chloromethyl)-1,1,3,3-tetramethyl-; (Chloromethyl)pentamethyldisiloxane (related isomer)
EINECS	220-941-6

Quality Control

Our 1,3-Bis(Dichloromethyl)-1,1,3,3-Tetramethyldisiloxane is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. Production adheres to ISO 9001 quality management standards. Each lot is rigorously analyzed using techniques including GC, NMR, and titration to verify identity, purity, and absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

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). This compound is hygroscopic (moisture-sensitive) and should be kept under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent hydrolysis. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 97.0%
Density (at 20°C)	1.15 - 1.20 g/cm³
Refractive Index (n20D)	1.435 - 1.445
Water Content (KF)	≤ 0.1%
Chloride Content	Contact for details

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