Description

1,7-Divinyl-1,1,3,3,5,5,7,7-Octamethyl Tetrasiloxane is a high-purity, functional organosilicon compound, specifically a linear vinyl-terminated siloxane. This chemical is a critical reactive intermediate and cross-linking agent in advanced silicone polymer synthesis, valued for its ability to introduce vinyl functionality into polymer backbones. It is essential for manufacturers in the silicone rubber, specialty resins, and advanced materials sectors seeking to enhance product properties like cure kinetics, thermal stability, and mechanical strength.

Application

• Silicone Rubber & Elastomers: Acts as a key cross-linking agent in addition-cure (platinum-catalyzed) systems for High Consistency Rubber (HCR) and Liquid Silicone Rubber (LSR).
• Silicone Resins & Coatings: Serves as a reactive modifier to improve flexibility, adhesion, and weatherability in high-performance protective and release coatings.
• Silicone Fluids & Additives: Used in the synthesis of specialty vinyl-functional silicone fluids for use as surfactants, foam control agents, and lubricant additives.
• Adhesives & Sealants: Incorporated into formulations to optimize cure profiles and enhance the bond strength and elasticity of silicone-based adhesives.
• Personal Care & Cosmetics: Employed in the production of silicone conditioning agents for hair care and skincare products, providing a silky, non-greasy feel.
• Electronics & Encapsulation: Utilized in the formulation of potting compounds and encapsulants for electronic components, offering excellent dielectric properties and thermal stability.
• Release Coatings: A precursor in the manufacture of silicone release liners for pressure-sensitive labels and tapes.
• Research & Development: A valuable building block in academic and industrial R&D for creating novel hybrid organic-inorganic materials and copolymers.

Basic Information

Product Name	1,7-Divinyl-1,1,3,3,5,5,7,7-Octamethyl Tetrasiloxane
CAS No.	13315-13-4
Molecular Formula	C12H32O3Si4
Molecular Weight	348.76 g/mol
Synonyms	Divinyltetramethylcyclotetrasiloxane (common misnomer); Tetramethyl Divinyl Tetrasiloxane; 1,7-Divinyloctamethyltetrasiloxane; Vinyl Terminated Polydimethylsiloxane (DVi4); DVi4; Tetrakis(dimethylvinylsiloxy)silane (related structure); Octamethyl-1,7-divinyltetrasiloxane; Linear Vinyl Siloxane Tetramer
EINECS	Contact for details

Quality Control

Our 1,7-Divinyl-1,1,3,3,5,5,7,7-Octamethyl Tetrasiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity, consistent reactivity, and compliance with agreed specifications. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, vinyl content, and impurity profiles. Our quality commitment supports applications requiring reliable performance in sensitive formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. This material is moisture-sensitive (hygroscopic) and should be stored under an inert atmosphere (e.g., nitrogen) to prevent hydrolysis and maintain purity. Isolate from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Vinyl Content	Contact for details
Refractive Index (n20D)	~1.400 - 1.410
Density (20°C)	~0.92 - 0.96 g/mL
Water Content (KF)	≤ 0.1%

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