Description

Dimethyloctadecylsilane is a high-purity organosilicon compound, specifically a long-chain alkylsilane. This chemical is valued for its ability to impart hydrophobic and oleophobic properties to surfaces, serving as a versatile surface modifier and coupling agent. It is essential for manufacturers in the coatings, polymers, and specialty chemicals industries seeking to enhance material performance through surface functionalization.

Application

• As a hydrophobic agent and surface modifier in coatings, paints, and inks.
• As a coupling agent for improving the compatibility and dispersion of inorganic fillers in polymer matrices.
• In the synthesis of silicone polymers and resins with specific long-chain alkyl properties.
• For the surface treatment of silica, glass, and other minerals to create water-repellent characteristics.
• As an intermediate in the production of more complex organosilicon compounds and quaternary ammonium salts.
• In the formulation of release agents and mold lubricants for industrial manufacturing processes.
• For research and development in material science, exploring self-assembled monolayers (SAMs) and nano-coatings.

Basic Information

Product Name	Dimethyloctadecylsilane
CAS No.	3295-58-7
Molecular Formula	C₂₀H₄₄Si
Molecular Weight	312.66 g/mol
Synonyms	Octadecyldimethylsilane; Dimethyl-n-octadecylsilane; n-Octadecyldimethylsilane; Dimethyl(octadecyl)silane; Octadecyl(dimethyl)silane; Silane, dimethyloctadecyl-; 1-Octadecyldimethylsilane; Dimethyl(stearyl)silane
EINECS	221-966-1

Quality Control

Our Dimethyloctadecylsilane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including GC and NMR, to ensure high chemical purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment to guarantee it meets your specific application 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 material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	0.78 - 0.82 g/mL
Refractive Index (n20D)	1.440 - 1.445

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