Description

Dimethylbis(Octadecyloxy)Silane is a high-purity organosilicon compound characterized by its long-chain alkoxy groups. This structure is critical for its role as a versatile surface modifier and coupling agent, providing excellent hydrophobic and oleophobic properties. It is essential for industries requiring advanced material performance, particularly in coatings, polymers, and specialty chemical synthesis where surface energy control and compatibility are paramount.

Application

• As a key hydrophobic agent in protective coatings for textiles, leather, and paper.
• As a surface modifier and coupling agent in advanced polymer composites and masterbatches.
• As an additive to enhance the water repellency and release properties of silicone rubbers and resins.
• In the formulation of high-performance lubricants and mold release agents.
• As a chemical intermediate for synthesizing more complex functional silanes.
• For surface treatment of fillers and pigments to improve dispersion in organic matrices.

Basic Information

Product Name	Dimethylbis(Octadecyloxy)Silane
CAS No.	29043-70-7
Molecular Formula	C₃₈H₈₀O₂Si
Molecular Weight	597.1 g/mol
Synonyms	Dimethyldioctadecyloxysilane; Dioctadecyloxydimethylsilane; Bis(octadecyloxy)dimethylsilane; Dimethyl Di(stearyloxy)silane; Stearyloxy Dimethylsilane; Octadecyloxy Dimethylsilane Derivative; Silane, dimethylbis(octadecyloxy)-
EINECS	Contact for details

Quality Control

Our Dimethylbis(Octadecyloxy)Silane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay by GC or HPLC and identity confirmation by FT-IR, to ensure it meets precise specifications and high-purity standards. A comprehensive Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and compliance.

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 moisture absorption.

Specification

Item	Specification
Appearance	White to off-white waxy solid or flakes
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 97.0%
Melting Point	Contact for details

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