Description

n-Octyltris(Trimethylsiloxy)Silane, 95% is a high-purity organosilicon compound, specifically a functionalized silane, valued for its hydrophobic and surface-modifying properties. This chemical is a critical intermediate and additive for imparting water repellency, improving adhesion, and modifying surface energy in advanced materials. It is essential for manufacturers in the silicone polymers, coatings, and specialty chemicals sectors seeking to enhance product performance and durability.

Application

• Hydrophobic Additive: Used as a key ingredient in water-repellent coatings for textiles, construction materials, and electronic components.
• Crosslinking Agent: Functions as a crosslinker in silicone resin and rubber formulations to improve thermal stability and mechanical properties.
• Surface Priming & Coupling: Acts as an adhesion promoter and coupling agent for organic-inorganic composites, enhancing bond strength between polymers and mineral fillers or glass.
• Silicone Fluid Modification: Employed to modify the properties of silicone oils and fluids, tailoring them for specific release, lubrication, or dielectric applications.
• Nanomaterial Functionalization: Utilized to surface-treat silica nanoparticles and other inorganic nanomaterials to improve dispersion in organic matrices.
• Personal Care Ingredients: Serves as a conditioning agent and emollient in high-performance hair and skin care formulations.

Basic Information

Product Name	n-Octyltris(Trimethylsiloxy)Silane, 95%
CAS No.	187592-85-4
Molecular Formula	C17H44O3Si4
Molecular Weight	420.89 g/mol
Synonyms	Octyltris(trimethylsiloxy)silane; Tris(trimethylsiloxy)octylsilane; 1-Octyltris(trimethylsiloxy)silane; Silane, octyltris(trimethylsiloxy)-; Octylsilane tris(trimethylsilyl ether); (Octyl)tri(trimethylsiloxy)silane; OTS (common abbreviation); n-Octyl-Si(OSi(CH3)3)3
EINECS	Contact for details

Quality Control

Our n-Octyltris(Trimethylsiloxy)Silane, 95% is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing, including GC, NMR, and FTIR, to ensure identity, purity, and consistency. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications. We support our global clients with documentation for regulatory and supply chain requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Water Content (Karl Fischer)	≤ 0.1%
Refractive Index (n20D)	1.410 - 1.420
Density (20°C)	0.88 - 0.92 g/mL

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