Description

3,5-Bis-(Chloromethyl)Octamethyltetrasiloxane is a bifunctional organosilicon compound featuring reactive chloromethyl groups on a flexible tetrasiloxane backbone. This unique structure makes it a valuable versatile intermediate for the synthesis of advanced silicone polymers and hybrid materials. It is primarily sought by manufacturers in the silicone industry for creating specialty fluids, resins, and elastomers with tailored properties.

Application

• Key Intermediate for Silicone Modification: Serves as a reactive building block for introducing functional groups into silicone polymers.
• Crosslinking Agent: Used in the formulation of heat-curable silicone resins and elastomers, enhancing network strength.
• Synthesis of Silicone Surfactants & Additives: A precursor for creating surface-active organosilicon compounds used in polyurethane foam, coatings, and personal care products.
• Hybrid Organic-Inorganic Materials: Facilitates the creation of sol-gel derived materials for advanced coatings, adhesives, and composites.
• Pharmaceutical & Agrochemical Intermediates: Employed in the synthesis of specialized siloxane-based active ingredients or delivery agents.
• Adhesive & Sealant Formulations: Imparts specific reactivity and compatibility in high-performance silicone adhesive systems.

Basic Information

Product Name	3,5-Bis-(Chloromethyl)Octamethyltetrasiloxane
CAS No.	17988-79-3
Molecular Formula	C10H26Cl2O3Si4
Molecular Weight	377.58 g/mol
Synonyms	1,1,1,3,5,7,7,7-Octamethyl-3,5-bis(chloromethyl)tetrasiloxane; Tetrasiloxane, 1,1,1,3,5,7,7,7-octamethyl-3,5-bis(chloromethyl)-; 3,5-Bis(chloromethyl)-1,1,1,3,5,7,7,7-octamethyltetrasiloxane; Octamethyl-3,5-bis(chloromethyl)tetrasiloxane; Bis(chloromethyl)octamethyltetrasiloxane; Reactive Chloromethyl Siloxane
EINECS	Contact for details

Quality Control

Our 3,5-Bis-(Chloromethyl)Octamethyltetrasiloxane is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure high purity and consistent reactivity. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is 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, well-ventilated area away from incompatible materials such as strong acids, bases, and oxidizing agents. Recommended storage temperature is 2-25°C. The product is sensitive to moisture; keep containers tightly sealed when not in use.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 95.0%
Chlorine Content	Contact for details
Density (25°C)	~1.00 g/cm³
Refractive Index (n20D)	~1.405

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