Description

n-Octyldimethylchlorosilane is a versatile organosilicon reagent featuring a reactive chlorosilane group and a hydrophobic octyl chain. This compound is essential for introducing permanent hydrophobic and oleophobic surface modifications to a wide range of inorganic and organic substrates. It is a critical intermediate for manufacturers in the advanced materials, pharmaceutical, and electronics industries seeking to precisely control surface properties and reactivity.

Application

• Surface Modification Agent: Primarily used as a silylating agent to hydrophobize silica, glass, metals, and other oxides for improved moisture resistance and chemical stability.
• Silicone Intermediate: Serves as a key building block in the synthesis of specialty silicone oils, resins, and elastomers with tailored properties.
• Chromatography: Employed to derivatize stationary phases (e.g., silica gel) for reverse-phase HPLC columns, enhancing separation of non-polar compounds.
• Adhesion Promotion: Used as a coupling agent in composite materials and coatings to improve adhesion between organic polymers and inorganic fillers.
• Nanomaterial Functionalization: Modifies the surface of nanoparticles (e.g., silica, quantum dots) to alter dispersion characteristics and compatibility with polymer matrices.
• Water Repellents: A component in formulations for creating water- and stain-resistant coatings on textiles, stone, and construction materials.
• Pharmaceutical Synthesis: Acts as a protecting group or intermediate in the synthesis of complex organic molecules and active pharmaceutical ingredients (APIs).
• Electronics: Used in the passivation and protection of sensitive electronic components and semiconductors.

Basic Information

Product Name	n-Octyldimethylchlorosilane
CAS No.	18162-84-0
Molecular Formula	C10H23ClSi
Molecular Weight	206.83 g/mol
Synonyms	Chlorodimethyloctylsilane; Dimethyloctylchlorosilane; Octyldimethylchlorosilane; n-Octyldimethylsilyl chloride; 1-Octyldimethylchlorosilane; Dimethyl-n-octylchlorosilane; ODMCS; n-C8H17(CH3)2SiCl
EINECS	242-060-2

Quality Control

Our n-Octyldimethylchlorosilane is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including GC and NMR, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each 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 2-8°C under an inert atmosphere (argon or nitrogen) due to its hygroscopic and highly volatile nature. Keep away from moisture, strong bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 25°C)	0.86 - 0.88 g/mL
Refractive Index (n20/D)	1.428 - 1.432
Chloride Content	16.8 - 17.4 %

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