Description

Tris(Trimethylsiloxy)Silane CAS NO 1873-89-8 is a versatile organosilicon compound characterized by its unique structure of three trimethylsiloxy groups bonded to a central silicon atom. This silane derivative is a critical intermediate and functional additive, valued for its ability to impart hydrophobicity, modify surface properties, and act as a silylating agent. It is essential for manufacturers and R&D teams in the silicone polymers, specialty coatings, and advanced materials sectors seeking to enhance product performance and develop novel formulations.

Application

• Key intermediate in the synthesis of silicone resins, fluids, and elastomers.
• Surface modification agent for inorganic fillers (e.g., silica, glass) to improve dispersion and compatibility in polymer matrices.
• Hydrophobizing agent in protective coatings, sealants, and water-repellent treatments.
• Precursor for the preparation of silsesquioxanes and other advanced hybrid organic-inorganic materials.
• Silylating reagent in organic synthesis and pharmaceutical chemistry to protect reactive functional groups.
• Crosslinking agent or chain terminator in controlled silicone polymerizations.
• Additive in personal care products (e.g., hair conditioners, cosmetics) to provide smooth feel and moisture resistance.
• Component in release coatings and pressure-sensitive adhesives.

Basic Information

Product Name	Tris(Trimethylsiloxy)Silane
CAS No.	1873-89-8
Molecular Formula	C9H28O3Si4
Molecular Weight	296.68 g/mol
Synonyms	Tris(trimethylsiloxy)silane; Silane, tris(trimethylsiloxy)-; Tris-O-(trimethylsilyl) silanol; Tris(trimethylsilyloxy)silane; TTMS; Hydrotris(trimethylsiloxy)silane; 1,1,1-Tris(trimethylsiloxy)silane; Tris(trimethylsilyl) orthosilicate
EINECS	217-506-9

Quality Control

Our Tris(Trimethylsiloxy)Silane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and FTIR, to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical specifications. Our quality commitment ensures the material meets the high standards required for industrial synthesis and advanced material development.

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. Keep away from incompatible materials such as strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	0.86 - 0.88 g/cm³
Refractive Index (n20D)	1.390 - 1.395
Water Content (KF)	≤ 0.1%

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