Description

Hexadecyltrimethoxysilane is a long-chain alkyl silane coupling agent widely used in surface modification and material science. Its primary value lies in its ability to impart hydrophobic and oleophobic properties to inorganic substrates, enhancing compatibility with organic polymers. This product is essential for manufacturers in the coatings, plastics, and advanced composites industries seeking to improve material performance and durability. Hexadecyltrimethoxysilane CAS NO 16415-12-6 is a key intermediate for creating water-repellent surfaces and functional fillers.

Application

• Surface treatment agent for silica, glass, and other mineral fillers to improve dispersion in polymer matrices.
• Hydrophobic modifier in architectural and industrial protective coatings.
• Coupling agent in silicone rubber and resin composites to enhance mechanical properties.
• Key ingredient in the synthesis of superhydrophobic and self-cleaning surface treatments.
• Primer or adhesion promoter for coatings on difficult substrates like metals and glass.
• Modifier for nanoparticles to prevent agglomeration and ensure stable suspensions.
• Waterproofing agent for construction materials, including concrete and stone.
• Intermediate in the production of specialty silicones and silane-based polymers.

Basic Information

Item	Detail
Product Name	Hexadecyltrimethoxysilane
CAS No.	16415-12-6
Molecular Formula	C19H42O3Si
Molecular Weight	346.62 g/mol
Synonyms	n-Hexadecyltrimethoxysilane; C16 Silane; Palmityltrimethoxysilane; Trimethoxy(hexadecyl)silane; Silane coupling agent KH-3116; Dynasylan® 9116; 1-Hexadecanol, 1-(trimethoxysilyl)-; (Hexadecyl)trimethoxysilane
EINECS	240-455-4

Quality Control

Our Hexadecyltrimethoxysilane is produced under a stringent quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analysis, including assay by GC, identity confirmation by FT-IR, and verification of key physical properties. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

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); containers must be kept tightly sealed to prevent contact with atmospheric moisture, which can lead to hydrolysis and reduced efficacy.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (20°C)	0.88 - 0.90 g/cm³
Refractive Index (n20D)	1.428 - 1.432

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