Description

Chloromethylpentamethyldisiloxane is a versatile organosilicon compound featuring a reactive chloromethyl group. This chemical is a valuable intermediate in the synthesis of functionalized siloxanes and silicone polymers, enabling precise modification of material properties. It is primarily sought by manufacturers in the silicone industry, pharmaceutical intermediates sector, and advanced materials research for applications requiring tailored surface characteristics or specific chemical functionality.

Application

• Silicone Polymer Modification: Key intermediate for introducing reactive sites into polydimethylsiloxane (PDMS) backbones to create custom silicones.
• Surface Treatment Agent: Used to prepare hydrophobic or functionalized surfaces on glass, silica, and other inorganic materials.
• Pharmaceutical & Agro-chemical Synthesis: Serves as a building block for creating siloxane-based active ingredients or prodrugs.
• Crosslinking Agent: Functions as a crosslinker in the production of specialty silicone resins and elastomers.
• Adhesion Promoter: Enhances the adhesion of silicone-based materials to various substrates.
• Research & Development: Utilized in academic and industrial R&D for developing novel organosilicon compounds and hybrid materials.

Basic Information

Product Name	Chloromethylpentamethyldisiloxane
CAS No.	17201-83-1
Molecular Formula	C6H17ClOSi2
Molecular Weight	196.83 g/mol
Synonyms	1-(Chloromethyl)-1,1,3,3,3-pentamethyldisiloxane; (Chloromethyl)pentamethyldisiloxane; Disiloxane, 1-(chloromethyl)-1,1,3,3,3-pentamethyl-; Chloromethylpentamethyl Disiloxane; CMDMS; (Chloromethyl)dimethylsiloxydimethylsilane
EINECS	Contact for details

Quality Control

Our Chloromethylpentamethyldisiloxane is manufactured under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including assay by GC or HPLC and impurity profiling, to ensure high purity and consistency. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment to support your quality assurance processes.

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 product is hygroscopic (moisture-sensitive) and should be handled under a dry atmosphere (e.g., nitrogen) to prevent decomposition. 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 25°C)	0.88 - 0.92 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.