Description

3-Chloromethyl Heptamethyl Trisiloxane is a specialized organosilicon compound featuring a reactive chloromethyl group on a trisiloxane backbone. This unique structure makes it a valuable intermediate for introducing siloxane functionality into target molecules, enhancing properties like hydrophobicity, lubricity, and thermal stability. It is primarily sought by R&D chemists and process engineers in the silicone industry for synthesizing advanced silicone fluids, surfactants, and functional polymers.

Application

• Silicone Surfactant Synthesis: A key intermediate for manufacturing non-ionic silicone polyether surfactants used in polyurethane foam stabilization and personal care products.
• Functional Silicone Fluids: Serves as a precursor for creating custom silicone oils with pendant functional groups for specialized lubricants and release agents.
• Crosslinking Agent: Used in the production of crosslinked silicone resins and elastomers, where the chloromethyl group participates in further chemical reactions.
• Surface Modification: Employed to graft siloxane chains onto organic or inorganic substrates, imparting water repellency and improved surface slip.
• Adhesion Promoters: Acts as a building block in the synthesis of silane adhesion promoters for coatings and composite materials.
• Pharmaceutical & Agro-chemical Intermediates: Utilized in research to incorporate siloxane moieties into bioactive molecules to modify their physical and pharmacokinetic properties.

Basic Information

Product Name	3-Chloromethyl Heptamethyl Trisiloxane
CAS No.	17201-87-5
Molecular Formula	C9H25ClO2Si3
Molecular Weight	297.00 g/mol
Synonyms	1,1,1,3,5,5,5-Heptamethyl-3-(chloromethyl)trisiloxane; Chloromethylheptamethyltrisiloxane; Heptamethyl(3-chloromethyl)trisiloxane; Trisiloxane, 3-(chloromethyl)-1,1,1,3,5,5,5-heptamethyl-; (Chloromethyl)heptamethyltrisiloxane; Silicone intermediate 17201-87-5
EINECS	Contact for details

Quality Control

Our production of 3-Chloromethyl Heptamethyl Trisiloxane adheres to stringent in-process controls to ensure batch-to-batch consistency and high chemical purity. Each lot is analyzed via GC, NMR, and titration methods to confirm identity, assay, and chloride content. A comprehensive Certificate of Analysis (COA) detailing all specifications 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 away from incompatible materials such as strong acids, bases, and oxidizing agents. Recommended storage temperature is between 2°C and 25°C. The product is sensitive to moisture; keep containers tightly sealed under an inert atmosphere such as nitrogen for long-term storage to maintain optimal purity and reactivity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Chloride Content (Titration)	11.5 - 12.5 %
Density (at 25°C)	0.95 - 0.98 g/mL
Refractive Index (n20/D)	1.405 - 1.410

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