Description

Chloromethylheptamethylcyclotetrasiloxane is a specialized organosilicon compound featuring a reactive chloromethyl group on a cyclic siloxane backbone. This unique structure makes it a valuable intermediate for introducing functional siloxane units into polymers and surfaces, enhancing properties like hydrophobicity, thermal stability, and chemical resistance. It is primarily utilized by manufacturers in the silicone industry, advanced materials sector, and R&D laboratories for developing custom siloxane-based products.

Application

• Silicone Intermediate: A key building block for the synthesis of functionalized silicone oils, resins, and elastomers.
• Surface Modification: Used to create hydrophobic or release coatings on textiles, paper, and various substrates.
• Crosslinking Agent: Serves as a reactive site in the formulation of crosslinked silicone networks and sealants.
• Polymer Functionalization: Employed to graft siloxane chains onto organic polymers to improve flexibility and surface characteristics.
• Adhesive & Sealant Formulations: Imparts specific reactivity and compatibility in specialty silicone adhesive systems.
• Research & Development: A versatile precursor for exploring new organosilicon chemistry and material science applications.

Basic Information

Product Name	Chloromethylheptamethylcyclotetrasiloxane
CAS No.	17882-66-5
Molecular Formula	C8H24ClO3Si4
Molecular Weight	321.99 g/mol
Synonyms	1-Chloromethyl-1,3,5,7-tetramethyl-3,5,7-tris(trimethylsiloxy)cyclotetrasiloxane; Chloromethylheptamethylcyclotetrasiloxane; Cyclotetrasiloxane, 1-chloromethyl-1,3,5,7-tetramethyl-3,5,7-tris(trimethylsiloxy)-; Heptamethylchloromethylcyclotetrasiloxane; D4-Chloromethyl; (Chloromethyl)heptamethylcyclotetrasiloxane
EINECS	Contact for details

Quality Control

Our Chloromethylheptamethylcyclotetrasiloxane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and key specifications are available upon request 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 bases and organic solvents. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to prevent moisture absorption and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Chlorine Content	As per theoretical value
Density (25°C)	~1.00 g/mL
Refractive Index (n20D)	~1.400

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