Octadecyltrimethoxysilane (CAS 3069-42-9) is a fascinating organosilicon compound that holds significant importance in the fields of surface science, materials engineering, and specialized chemical synthesis. Its unique molecular structure and reactivity enable a broad spectrum of applications, primarily centered around its ability to modify surface properties. As a dedicated manufacturer and supplier, we are pleased to share insights into the science behind this versatile chemical.

At its core, Octadecyltrimethoxysilane is a silane characterized by a long, eighteen-carbon alkyl chain (octadecyl) attached to a silicon atom, which also bears three methoxy (-OCH3) groups. This structure is key to its functionality. The methoxy groups are hydrolyzable, meaning they react with moisture or surface hydroxyls to form silanol groups (-Si-OH). These silanol groups can then condense with other silanols or with hydroxyls on a substrate surface, forming stable siloxane (Si-O-Si) bonds. This process anchors the molecule to the surface.

The long, non-polar octadecyl chain that extends away from the surface after bonding is responsible for the compound's hydrophobicity. It creates a low-surface-energy layer that repels water. This makes Octadecyltrimethoxysilane an ideal choice for creating hydrophobic coatings, such as water-repellent treatments for textiles, glass, and construction materials. Furthermore, when applied under controlled conditions, it forms highly ordered, single-molecule thick layers known as self-assembled monolayers (SAMs). These SAMs are critical in nanotechnology, biosensors, and surface patterning.

For procurement managers and researchers looking to buy Octadecyltrimethoxysilane, understanding its properties is crucial. It is a colorless liquid with a melting point around 16-17°C, meaning it can solidify at cooler temperatures but is typically handled as a liquid. It is moisture-sensitive, requiring careful handling and storage to maintain its integrity. As a premier Octadecyltrimethoxysilane supplier based in China, we ensure that our product is manufactured to high purity standards, supporting the precise requirements of SAM formation and advanced coating applications. Our commitment extends to providing reliable supply and competitive pricing for both sample and bulk orders.

The applications of Octadecyltrimethoxysilane extend beyond surface modification. It also serves as a valuable intermediate in organic synthesis, where its unique structure can be incorporated into more complex molecules. We are proud to be a trusted partner for companies utilizing this compound in diverse sectors, including pharmaceuticals and agrochemicals. When you need to purchase Octadecyltrimethoxysilane, choose a supplier that offers quality, expertise, and a commitment to your success. Contact us to discuss your needs and receive a quote.