Description

1,1,1,5,5,5-Hexamethyl-3-(Trimethylsilyl)Trisiloxane is a specialized organosilicon compound, specifically a branched trisiloxane derivative functionalized with a trimethylsilyl group. This unique structure provides a valuable combination of high volatility and silicon-based reactivity, making it a critical intermediate in advanced silicone synthesis. It is primarily utilized by manufacturers in the silicone polymer, electronics, and specialty chemical industries for creating custom siloxane architectures, surface modifiers, and release agents.

Application

• Silicone Intermediate: A key building block for the synthesis of novel branched, cross-linked, or functionalized silicone polymers and resins.
• Surface Modification: Used to impart hydrophobic or specific release properties to surfaces in coatings and treatments.
• Electronics & Semiconductor: Serves as a precursor in the deposition of silicon-containing thin films or as a formulation component in specialty electronic chemicals.
• Adhesives & Sealants: Incorporated to modify rheology, cure characteristics, or thermal stability in high-performance formulations.
• Research & Development: Employed in organic and organometallic chemistry as a versatile reagent for introducing silyl groups.
• Lubricants & Greases: Acts as a high-performance additive or base fluid in specialty lubricants requiring thermal and oxidative stability.

Basic Information

Product Name	1,1,1,5,5,5-Hexamethyl-3-(Trimethylsilyl)Trisiloxane
CAS No.	139347-50-5
Molecular Formula	C9H30O2Si4
Molecular Weight	282.70 g/mol
Synonyms	Trisiloxane, 1,1,1,5,5,5-hexamethyl-3-(trimethylsilyl)-; 3-(Trimethylsilyl)-1,1,1,5,5,5-hexamethyltrisiloxane; Hexamethyl[3-(trimethylsilyl)trisiloxane]; HMTS; TMS-Hexamethyltrisiloxane; Trimethylsilyl Hexamethyltrisiloxane; Branched Trisiloxane Derivative
EINECS	Contact for details

Quality Control

Our 1,1,1,5,5,5-Hexamethyl-3-(Trimethylsilyl)Trisiloxane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and Karl Fischer titration, to ensure high purity and consistent performance. Comprehensive Certificates of Analysis (COA) detailing identity, assay, and impurity profiles are provided to guarantee supply reliability and technical compliance for your critical processes.

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 highly volatile nature, keep containers tightly sealed when not in use and away from heat, sparks, and open flame. Incompatible with strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Density (at 20°C)	~0.85 g/mL
Refractive Index (n20D)	~1.390

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