Description

1,11-Dichloro-1,1,3,3,5,5,7,7,9,9,11,11-Dodecamethylhexasiloxane is a high-purity, functionalized linear siloxane oligomer, serving as a critical reactive intermediate in advanced silicone synthesis. Its precise molecular structure, featuring terminal chlorine atoms, makes it an essential building block for creating custom silicone polymers with tailored properties. This compound is primarily utilized by R&D chemists and production specialists in the silicone, electronics, and specialty coatings industries for developing high-performance materials.

Application

• Silicone Polymer Modification: Acts as a chain extender or cross-linking agent to introduce specific functional groups or modify the physical properties of silicone resins and elastomers.
• Surface Treatment Agent: Used to create hydrophobic or oleophobic coatings on glass, metals, and ceramics for electronics and optical applications.
• Precursor for Silane Coupling Agents: Serves as a key intermediate in the synthesis of complex silane coupling agents for composite materials and adhesives.
• Electronic Grade Materials: Employed in the formulation of encapsulants, sealants, and dielectric materials for semiconductor and microelectronic device protection.
• Laboratory Reagent: Used in organic and organometallic synthesis research to construct novel siloxane-based architectures.
• Specialty Additive: Incorporated into formulations to enhance thermal stability, rheological properties, or chemical resistance of final products.

Basic Information

Item	Detail
Product Name	1,11-Dichloro-1,1,3,3,5,5,7,7,9,9,11,11-Dodecamethylhexasiloxane
CAS No.	16106-81-3
Molecular Formula	C12H36Cl2O5Si6
Molecular Weight	491.76 g/mol
Synonyms	Dodecamethylhexasiloxane, 1,11-dichloro-; Hexasiloxane, 1,11-dichloro-1,1,3,3,5,5,7,7,9,9,11,11-dodecamethyl-; Dichlorododecamethylhexasiloxane; Chlorinated Hexamethyltrisiloxane Dimer; Linear Chlorosiloxane Oligomer; L2 Siloxane (industry abbreviation); Bis(trimethylsiloxy)methylsiloxy-based chlorosilane
EINECS	Contact for details

Quality Control

Our production of 1,11-Dichloro-1,1,3,3,5,5,7,7,9,9,11,11-Dodecamethylhexasiloxane adheres to a stringent quality management system to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including GC, NMR, and Karl Fischer titration to verify identity, assay, and critical impurity profiles such as hydrolyzable chloride and residual solvents. A comprehensive Certificate of Analysis (COA) documenting all test results 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 a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and may react with strong acids or bases; it should be kept under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent hydrolysis and maintain purity. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 97.0%
Hydrolyzable Chloride	≤ 1.5%
Water Content (KF)	≤ 0.1%
Density (at 25°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.