Description

1,1,1,5,5,5-Hexamethyltrisiloxane is a high-purity organosilicon compound, specifically a linear trisiloxane, valued for its role as a versatile chemical intermediate and functional fluid. Its structure makes it a key building block in the synthesis of more complex silicone polymers and for modifying surface properties. This product is essential for manufacturers in the silicone industry, specialty chemical production, and advanced material research who require reliable, high-quality siloxane precursors.

Application

• Silicone Polymer Synthesis: Serves as a fundamental monomer or chain extender in the production of polydimethylsiloxanes (PDMS) and other specialty silicone fluids, gums, and resins.
• Surface Modification Agent: Used to impart hydrophobic (water-repellent) characteristics to surfaces of glass, ceramics, and textiles.
• Coupling Agent/Crosslinker: Functions as a reactive intermediate in the formulation of adhesives, sealants, and coatings to enhance performance and durability.
• Lubricant & Heat Transfer Fluid Base: Employed as a base stock or additive in high-performance lubricants and heat transfer fluids due to its thermal stability and low viscosity.
• Personal Care & Cosmetic Ingredients: Acts as a precursor in the manufacture of silicone derivatives used as emollients and conditioning agents in cosmetic formulations.
• Pharmaceutical Intermediates: Utilized in the synthesis of siloxane-based compounds for controlled drug delivery systems and other pharmaceutical applications.

Basic Information

Product Name	1,1,1,5,5,5-Hexamethyltrisiloxane
CAS No.	93254-88-7
Molecular Formula	C6H20O2Si3
Molecular Weight	208.48 g/mol
Synonyms	Hexamethyldisiloxane, 1,3-bis(trimethylsilyloxy)-; 1,3-Bis(trimethylsilyloxy)-1,1,3,3-tetramethyldisiloxane; HMTS; Trisiloxane, 1,1,1,5,5,5-hexamethyl-; 1,1,3,3-Tetramethyl-1,3-bis(trimethylsilyloxy)disiloxane; Bis(trimethylsiloxy)methylsilane; Methylenebis(trimethylsiloxy)silane
EINECS	Contact for details

Quality Control

Our 1,1,1,5,5,5-Hexamethyltrisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including gas chromatography (GC), to ensure high purity and consistency. Certificates of Analysis (COA) detailing purity, identity, and key physical parameters are provided with every shipment to guarantee compliance with your specifications and industry standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Recommended storage temperature is between 15°C and 25°C. The product is moisture-sensitive; keep container tightly sealed when not in use to prevent contact with atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Purity (GC)	≥ 98.0%
Refractive Index (n20D)	1.3870 - 1.3910
Density (20°C)	0.820 - 0.840 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.