Description

1,1,3,3,5,5-Hexamethyltrisiloxane is a linear, low molecular weight organosilicon compound characterized by its high volatility and siloxane backbone. This chemical serves as a versatile intermediate and functional fluid, valued for its ability to modify surface properties and act as a reactive building block in synthesis. It is primarily needed by manufacturers in the silicone industry, specialty chemical producers, and R&D laboratories for applications ranging from personal care to advanced materials.

Application

• Silicone Intermediate: A key precursor in the synthesis of more complex silicone polymers, resins, and copolymers.
• Surface Treatment Agent: Used to impart water repellency, lubricity, and release properties to textiles, paper, and various substrates.
• Personal Care & Cosmetics: Functions as a volatile carrier, emollient, and conditioning agent in antiperspirants, hair care, and skin care formulations.
• Lubricant & Heat Transfer Fluid: Employed in specialized high-performance lubricants and cooling fluids due to its thermal stability and low viscosity.
• Adhesive & Sealant Modifier: Acts as a plasticizer or flow control additive to modify the rheology and performance of silicone-based adhesives and sealants.
• Chemical Vapor Deposition (CVD) Precursor: Serves as a silicon source in the CVD process for depositing silicon-containing thin films on semiconductors and other surfaces.

Basic Information

Product Name	1,1,3,3,5,5-Hexamethyltrisiloxane
CAS No.	1189-93-1
Molecular Formula	C6H20O2Si3
Molecular Weight	208.48 g/mol
Synonyms	Hexamethyldisiloxane dimer; 1,1,1,3,5,5,5-Heptamethyltrisiloxane (common misnomer); HMTS; Trisiloxane, hexamethyl-; Bis(trimethylsiloxy)methylsilane; Methyltris(trimethylsiloxy)silane; L2; MD'M
EINECS	214-716-4

Quality Control

Our 1,1,3,3,5,5-Hexamethyltrisiloxane is produced under a strict quality management system. 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 properties are available for every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and open flame. Due to its highly volatile nature, ensure containers are kept tightly sealed when not in use to prevent evaporation and maintain product integrity. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Refractive Index (n20D)	1.3880 - 1.3920
Density (20°C)	0.820 - 0.830 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.