Description

Octamethoxy Trisiloxane is a versatile organosilicon compound, specifically a fully methoxylated trisiloxane. This chemical serves as a critical intermediate and functional additive, prized for its ability to modify surface properties and act as a crosslinking agent. It is essential for manufacturers in the silicone polymer, coatings, and adhesive industries seeking to enhance product performance and durability.

Application

• Silicone Resin & Polymer Synthesis: A key precursor and crosslinking agent for producing high-performance silicone resins, rubbers, and elastomers.
• Surface Treatment & Modification: Used to impart hydrophobic, oleophobic, or release properties to surfaces of glass, metals, and minerals.
• Adhesives & Sealants: Functions as an adhesion promoter and moisture-cure crosslinker in silicone-based formulations.
• Coatings & Paints: Incorporated as a modifying agent to improve weatherability, chemical resistance, and surface smoothness.
• Foundry & Mold Release: Acts as a core binder component and release agent in precision casting applications.
• Electronics Encapsulation: Utilized in potting compounds and encapsulants for electronic components requiring stable dielectric properties.

Basic Information

Item	Details
Product Name	Octamethoxy Trisiloxane
CAS No.	4221-95-8
Molecular Formula	C8H24O8Si3
Molecular Weight	356.53 g/mol
Synonyms	Trisiloxane, 1,1,1,3,3,5,5,5-octamethoxy-; Octamethoxytrisiloxane; 1,1,1,3,3,5,5,5-Octamethoxytrisiloxane; Methyl silicate trisiloxane; Tris(trimethoxysilyloxy)methane; Methoxy-functional trisiloxane; Silane, tris[(trimethoxysilyl)oxy]methyl-
EINECS	224-179-0

Quality Control

Our Octamethoxy Trisiloxane is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay and impurity profile determination, to ensure it meets precise specifications and consistent performance. Certificates of Analysis (COA) documenting purity, identity, and key physical parameters 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, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed after opening to prevent degradation by atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	1.05 - 1.15 g/cm³
Refractive Index (n20D)	1.380 - 1.390

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