Description

Decamethyl 1,9 Dichloropentasiloxane is a specialized organosilicon compound featuring a linear siloxane backbone terminated with reactive chloromethyl groups. This unique structure makes it a valuable intermediate for the synthesis of a wide range of functional silicone polymers and materials. It is particularly sought after by manufacturers in the silicone industry for creating custom siloxane copolymers, cross-linkers, and surface-modifying agents. Its controlled reactivity offers chemists a versatile building block for advanced material development.

Application

• Silicone Polymer Intermediate: A key precursor for synthesizing custom linear, branched, or cross-linked silicone polymers and resins.
• Surface Modification Agent: Used to impart hydrophobic or specific functional properties to inorganic surfaces like silica, glass, or metals.
• Cross-linking Agent: Serves as a reactive moiety in the formulation of silicone elastomers, sealants, and adhesives to control cure kinetics and network density.
• Pharmaceutical & Cosmetic Ingredient Synthesis: Employed as an intermediate in the production of specialty silicones used in drug delivery systems or personal care formulations.
• Lubricant & Grease Additive: Acts as a base or modifying component in the formulation of high-performance silicone-based lubricants and greases.
• Release Coating Precursor: A building block for silicone polymers used in industrial release coatings for papers, films, and molds.

Basic Information

Product Name	Decamethyl 1,9 Dichloropentasiloxane
CAS No.	14741-59-4
Molecular Formula	C10H30Cl2O4Si5
Molecular Weight	435.66 g/mol
Synonyms	1,9-Dichlorodecamethylpentasiloxane; Dichloropentasiloxane, decamethyl-; α,ω-Dichlorodecamethylpentasiloxane; Decamethylpentasiloxane, 1,9-dichloro-; Pentasiloxane, 1,9-dichlorodecamethyl-; Linear Chlorosiloxane; Chloromethyl-terminated Pentasiloxane; Siloxane, dichlorodecamethylpentasiloxane
EINECS	Contact for details

Quality Control

Our Decamethyl 1,9 Dichloropentasiloxane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including assay by GC or titration and impurity profiling, to ensure consistency and high purity suitable for industrial synthesis. Certificates of Analysis (COA) documenting key specifications are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. Due to its hygroscopic and reactive nature, containers should be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and hydrolysis. Recommended storage temperature is 2-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Chlorine Content	Contact for details
Density (25°C)	~1.02 g/cm³
Refractive Index (n20/D)	~1.395

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