Description

3-Ethoxy-1,1,1,5,5,5-Hexamethyl-3-(Trimethylsiloxy)Trisiloxane is a specialized organosilicon compound, also known as a silane coupling agent or a reactive silicone intermediate. This chemical is valued for its unique bifunctional structure, which allows it to act as a versatile building block and surface modifier in advanced material synthesis. It is primarily used by manufacturers in the silicone polymers, coatings, and adhesives industries to enhance product performance and durability.

Application

• As a silane coupling agent to improve adhesion between inorganic fillers (e.g., glass, minerals) and organic polymer matrices in composites.
• As a key reactive intermediate in the synthesis of custom silicone oils, resins, and elastomers with tailored properties.
• For surface modification of nanoparticles and pigments to improve dispersion and stability in coatings and inks.
• In the formulation of release coatings and pressure-sensitive adhesives where controlled surface energy is required.
• As a crosslinking agent or chain extender in silicone sealants and RTV (Room Temperature Vulcanizing) rubbers.
• In the production of hydrophobic coatings for textiles, construction materials, and electronic components.

Basic Information

Product Name	3-Ethoxy-1,1,1,5,5,5-Hexamethyl-3-(Trimethylsiloxy)Trisiloxane
CAS No.	18030-67-6
Molecular Formula	C11H32O4Si4
Molecular Weight	348.73 g/mol
Synonyms	Trisiloxane, 3-ethoxy-1,1,1,5,5,5-hexamethyl-3-(trimethylsiloxy)-; 1,1,1,5,5,5-Hexamethyl-3-(trimethylsiloxy)-3-ethoxytrisiloxane; 3-Ethoxy-1,1,1,5,5,5-hexamethyl-3-(trimethylsiloxy)trisiloxane; Ethoxy(hexamethyl)trisiloxanyloxytrimethylsilane; Silane coupling agent SIB1830.0 (trade name variant); Tris(trimethylsiloxy)ethoxysilane (related structural name); Ethoxy-terminated trisiloxane.
EINECS	Contact for details

Quality Control

Our 3-Ethoxy-1,1,1,5,5,5-Hexamethyl-3-(Trimethylsiloxy)Trisiloxane is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and FTIR, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep container tightly sealed under an inert atmosphere (e.g., nitrogen) to prevent degradation from moisture absorption. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	~0.90 g/mL
Refractive Index (n20D)	~1.390 - 1.400

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