Trichloro(octadecyl)silane

Trichloro(octadecyl)silane is an organosilicon compound with the molecular formula C18H37Cl3Si and CAS number 112-04-9. This chemical features a long octadecyl chain (C18) attached to a silicon atom bonded to three chlorine atoms. With a molecular weight of 387.9 g/mol, it belongs to the family of chlorosilanes used primarily as surface modification agents and coupling agents in various industrial applications.

Trichloro(octadecyl)silane is typically a liquid at room temperature with a characteristic pungent odor due to its chlorosilane structure. It is hydrophobic due to its long alkyl chain but reacts readily with water and moisture, releasing hydrogen chloride gas. The compound is soluble in organic solvents but decomposes in aqueous environments. Its high molecular weight and long carbon chain contribute to its surface-active properties.

Trichloro(octadecyl)silane is primarily used as a surface treatment agent to create hydrophobic coatings on glass, metal, and ceramic surfaces. It serves as a coupling agent in composite materials, improving adhesion between organic and inorganic phases. The compound is also employed in the production of self-assembled monolayers, anti-fouling coatings, and as a primer for enhancing paint adhesion on various substrates.

Trichloro(octadecyl)silane should be handled in well-ventilated areas or under fume extraction to prevent inhalation of vapors. Wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Avoid contact with water or moisture during handling as this generates corrosive hydrogen chloride gas. Use non-sparking tools and ensure proper grounding to prevent static electricity buildup during transfer operations.

Trichloro(octadecyl)silane must be stored in a cool, dry place away from moisture and water sources. Keep containers tightly sealed in their original packaging to prevent hydrolysis. Store away from incompatible materials such as alcohols, amines, and strong bases. Ensure adequate ventilation in storage areas and maintain temperatures below 25°C. Use appropriate secondary containment to prevent environmental release in case of container failure.

In case of skin contact with trichloro(octadecyl)silane, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. If eye contact occurs, flush immediately with clean water for 15 minutes and seek medical attention. In case of inhalation, move the person to fresh air and seek medical advice if breathing difficulties persist. Never induce vomiting if ingested.

Trichloro(octadecyl)silane waste must be disposed of according to local and national hazardous waste regulations. Do not discharge into drains, waterways, or soil due to its corrosive nature and environmental impact. Contact licensed hazardous waste disposal companies for proper collection and treatment. Small quantities can be neutralized carefully with appropriate alkali solutions under controlled conditions before disposal, following proper safety protocols and regulatory requirements.

Trichloro(octadecyl)silane is classified as ADR Class 8 (corrosive substances), Packing Group II for transportation purposes. It must be packaged in approved containers meeting UN specification requirements and properly labeled with appropriate hazard markings. Transport vehicles must carry appropriate emergency equipment and documentation. Drivers require ADR training certification, and shipments must comply with tunnel restriction codes and routing requirements for corrosive materials.

Trichloro(octadecyl)silane is subject to REACH regulation in Europe, requiring registration for manufacture or import above one tonne annually. It must comply with CLP regulation for classification, labeling, and packaging requirements. The substance is not currently listed as a Substance of Very High Concern (SVHC). Users must follow occupational exposure limits and workplace safety regulations. Import/export may require additional documentation depending on destination country requirements.

Trichloro(octadecyl)silane is available through OYSI, a specialized European distributor of technical chemicals serving industrial customers across the continent. OYSI provides reliable supply chains and technical support for organosilicon compounds including trichloro(octadecyl)silane. As an established chemical distributor, OYSI ensures proper handling, storage, and transportation of this corrosive material while maintaining compliance with European chemical regulations and safety standards.