Description

Chloroheptamethylcyclotetrasiloxane is a specialized organosilicon compound, a chlorinated cyclotetrasiloxane derivative. This chemical serves as a crucial intermediate and functional monomer in the synthesis of advanced silicone polymers and resins. It is essential for manufacturers in the silicone industry seeking to introduce specific reactive sites or modify polymer properties. Its applications are primarily found in the production of high-performance materials for electronics, coatings, and specialty elastomers.

Application

• Silicone Polymer Intermediate: A key building block for the synthesis of modified polysiloxanes and silicone copolymers.
• Reactive Silicone Fluids & Resins: Used to manufacture silicone fluids and resins with pendant or terminal reactive groups for further chemical modification.
• Crosslinking Agent: Functions as a crosslinker or chain extender in the production of heat-cured silicone rubbers (HCR) and liquid silicone rubbers (LSR).
• Surface Treatment & Coupling Agent Precursor: Serves as a precursor for creating surface treatment agents and silane coupling agents for fillers and composites.
• Specialty Coatings & Release Agents: Incorporated into formulations for high-temperature, non-stick, and release coatings.
• Electronic Encapsulants & Potting: Used in the synthesis of silicones for protecting sensitive electronic components.

Basic Information

Product Name	Chloroheptamethylcyclotetrasiloxane
CAS No.	18297-88-6
Molecular Formula	C7H21ClO3Si4
Molecular Weight	309.04 g/mol
Synonyms	1-Chloro-1,3,3,5,5,7,7-heptamethylcyclotetrasiloxane; Chloroheptamethyltetrasiloxane; Cyclotetrasiloxane, 1-chloro-1,3,3,5,5,7,7-heptamethyl-; Heptamethylchlorocyclotetrasiloxane; D4-Chloro derivative; Octamethylcyclotetrasiloxane, chloro derivative
EINECS	Contact for details

Quality Control

Our Chloroheptamethylcyclotetrasiloxane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and titration methods, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials. Due to its highly volatile nature, ensure containers are kept tightly sealed when not in use to prevent evaporation and moisture ingress. Recommended storage temperature is 2-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 95.0%
Chlorine Content	As per theoretical
Density (25°C)	~1.05 g/cm³
Refractive Index (n20D)	~1.395

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