Description

1,1,3,3,5,5-Hexamethyldiethoxytrisiloxane is a specialized organosilicon compound, specifically a functionalized trisiloxane, that serves as a versatile building block and intermediate in advanced material synthesis. Its value lies in its unique molecular structure, which combines reactive ethoxy groups with a stable siloxane backbone, enabling controlled cross-linking and surface modification. This product is essential for manufacturers in the silicone polymer, coatings, and electronics industries seeking to enhance material properties such as hydrophobicity, adhesion, and thermal stability.

Application

• As a key precursor or cross-linking agent in the synthesis of specialty silicone resins and elastomers.
• For surface treatment and modification of inorganic fillers (e.g., silica, glass) to improve dispersion in polymer matrices.
• In the formulation of release coatings and protective layers for industrial and paper applications.
• As an intermediate in the production of more complex siloxane-based materials for electronics and optics.
• For creating hydrophobic coatings on various substrates, including metals, ceramics, and textiles.
• In adhesive and sealant formulations to modify rheology and enhance performance properties.

Basic Information

Product Name	1,1,3,3,5,5-Hexamethyldiethoxytrisiloxane
CAS No.	17928-13-1
Molecular Formula	C10H30O4Si3
Molecular Weight	310.62 g/mol
Synonyms	Diethoxyhexamethyltrisiloxane; Hexamethyl-diethoxytrisiloxane; Trisiloxane, 1,1,3,3,5,5-hexamethyl-1,5-diethoxy-; 1,5-Diethoxy-1,1,3,3,5,5-hexamethyltrisiloxane; HMDEOT; Ethoxy-terminated hexamethyltrisiloxane; Dow Corning® Z-6697 (example trade material); Bis(ethoxydimethylsiloxy)methylsilane
EINECS	Contact for details

Quality Control

Our 1,1,3,3,5,5-Hexamethyldiethoxytrisiloxane is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay and impurity profiling. Certificates of Analysis (COA) detailing specific results are available upon request to support your quality assurance and regulatory compliance 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Density (at 20°C)	0.90 - 0.95 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.