Description

n-Butyltriethoxy Silane is a versatile organosilicon compound widely used as a coupling agent and surface modifier. Its primary value lies in its ability to form durable, hydrophobic, and organophilic layers on inorganic substrates, bridging the gap between organic polymers and inorganic materials. This makes it an essential chemical for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced material science applications.

Application

• As a coupling agent in mineral-filled polymer composites (e.g., filled polyolefins, epoxies) to improve mechanical properties and moisture resistance.
• Surface treatment for glass fibers, silica, and other mineral fillers to enhance dispersion and adhesion within polymer matrices.
• Hydrophobic coating agent for construction materials like concrete, stone, and masonry to provide water repellency and reduce efflorescence.
• Key intermediate in the synthesis of more complex silane derivatives and silicone-based polymers.
• Adhesion promoter in sealant and adhesive formulations, particularly for glass and metal substrates.
• Modifier for silica surfaces in chromatography and other analytical applications.
• Component in sol-gel processes for creating hybrid organic-inorganic materials and protective coatings.

Basic Information

Product Name	n-Butyltriethoxy Silane
CAS No.	4781-99-1
Molecular Formula	C10H24O3Si
Molecular Weight	220.39 g/mol
Synonyms	Butyltriethoxysilane; Triethoxy(butyl)silane; n-Butyltriethoxysilane; Silane, butyltriethoxy-; Butylsilanetriol triethyl ether; BTES; 1-Butyltriethoxysilane; Triethoxybutylsilane
EINECS	225-320-2

Quality Control

Our n-Butyltriethoxy Silane is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including Gas Chromatography (GC) for assay and impurity profiling, to meet exacting customer specifications. Certificates of Analysis (COA) detailing all test results are provided with every shipment and are available upon request.

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) to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.395 - 1.405
Density (20°C)	0.88 - 0.92 g/cm³
Water Content (Karl Fischer)	≤ 0.5%

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