Description

1,5-Dichlorohexamethyltrisiloxane is a versatile organosilicon compound that serves as a key reactive intermediate in silicone chemistry. Its value lies in its bifunctional chlorosilane structure, which allows for controlled chain extension and cross-linking in the synthesis of specialized silicone polymers and fluids. This product is essential for manufacturers in the silicone elastomer, resin, and specialty fluids industries who require precise molecular building blocks for high-performance materials.

Application

• Silicone Polymer Synthesis: Acts as a chain extender or cross-linking agent in the production of polydimethylsiloxane (PDMS) fluids, resins, and high-consistency rubber (HCR).
• Surface Modification: Used as a silylating agent to impart hydrophobic or release properties to inorganic surfaces like silica, glass, and metals.
• Silicone Copolymer Production: A fundamental monomer for creating modified siloxanes with organic functional groups for tailored properties.
• Adhesive & Sealant Formulations: Serves as a reactive intermediate in moisture-curing RTV (Room Temperature Vulcanizing) silicone systems.
• Lubricant & Grease Additives: A precursor for synthesizing specialty silicone-based lubricants with enhanced thermal stability and water repellency.
• Pharmaceutical & Cosmetic Intermediates: Used in the controlled synthesis of high-purity silicone derivatives for personal care and medical device applications.

Basic Information

Product Name	1,5-Dichlorohexamethyltrisiloxane
CAS No.	3582-71-6
Molecular Formula	C6H18Cl2O2Si3
Molecular Weight	277.37 g/mol
Synonyms	1,5-Dichloro-1,1,3,3,5,5-hexamethyltrisiloxane; Dichlorohexamethyltrisiloxane; Hexamethyltrisiloxane, 1,5-dichloro-; Bis(chlorodimethylsilyl)ether; Chloroterminated PDMS trimer; L2 Siloxane; Trisiloxane, 1,5-dichlorohexamethyl-; DC 3
EINECS	222-695-0

Quality Control

Our 1,5-Dichlorohexamethyltrisiloxane 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. 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 moisture-sensitive nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Chlorine Content	24.5 - 26.5 %
Density (25°C)	1.00 - 1.05 g/mL
Refractive Index (n20D)	1.405 - 1.415

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