Chloro(dimethyl)silane

Chloro(dimethyl)silane is an organosilicon compound with the molecular formula C2H7ClSi and CAS number 1066-35-9. This chemical has a molecular weight of 94.61 g/mol and belongs to the family of chlorosilanes. It consists of a silicon atom bonded to two methyl groups and one chlorine atom, making it a monofunctional silane derivative used primarily in industrial synthesis applications.

Chloro(dimethyl)silane is a colorless liquid with a characteristic pungent odor typical of chlorosilanes. It is highly reactive with water, undergoing hydrolysis to form siloxanes and hydrogen chloride. The compound has a relatively low molecular weight of 94.61 g/mol and exhibits typical organosilicon compound properties including volatility and sensitivity to moisture. It is soluble in organic solvents but reacts vigorously with protic solvents.

Chloro(dimethyl)silane is primarily used as a chemical intermediate in the synthesis of silicone polymers and siloxanes. It serves as a building block for producing dimethylsiloxane units in silicone chemistry. The compound is utilized in surface modification applications, as a coupling agent, and in the manufacture of specialty silicone materials. It is also employed in research and development for creating custom organosilicon compounds with specific properties.

Chloro(dimethyl)silane requires careful handling due to its reactive nature and flammability (ADR Class 3, Group I). Always wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Work in well-ventilated areas or under fume hoods to avoid inhalation of vapors. Keep away from heat sources, sparks, and open flames. Use only non-sparking tools and ensure proper grounding of equipment to prevent static discharge.

Chloro(dimethyl)silane must be stored in tightly sealed containers in a cool, dry place away from moisture and incompatible materials. Keep containers in a well-ventilated area away from heat sources and ignition sources due to its flammable nature. Store separately from water, alcohols, and strong bases which can cause violent reactions. Use appropriate secondary containment and ensure storage areas comply with local fire safety regulations for flammable liquids.

Chloro(dimethyl)silane contact requires immediate action to prevent injury. For skin contact, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. In case of eye contact, flush immediately with clean water for at least 15 minutes and seek medical attention. If inhaled, move to fresh air immediately. For ingestion, do not induce vomiting and seek immediate medical attention.

Chloro(dimethyl)silane disposal must follow local and national hazardous waste regulations. The substance cannot be disposed of down drains or in regular waste due to its reactive and flammable nature. Contact licensed hazardous waste disposal companies for proper treatment and disposal. Small quantities may be carefully hydrolyzed under controlled conditions by qualified personnel, but this should only be done following appropriate safety protocols and environmental regulations.

Chloro(dimethyl)silane is classified under ADR Class 3 (flammable liquids), Group I, indicating high hazard during transport. It must be packaged in appropriate UN-specification containers and labeled according to dangerous goods regulations. Transport requires proper documentation, emergency response information, and compliance with routing restrictions. Only qualified carriers with dangerous goods authorization should handle transportation, and vehicles must carry appropriate firefighting equipment.

Chloro(dimethyl)silane is subject to various chemical regulations including REACH registration requirements for manufacture, import, or use within the European Union. It must comply with CLP regulation for classification, labeling, and packaging. The substance is not currently listed as a Substance of Very High Concern (SVHC). Users must follow occupational safety regulations and may need to comply with additional local chemical safety requirements depending on application and quantities used.

Chloro(dimethyl)silane is available through specialized chemical distributors in Europe, including OYSI, a European distributor of technical chemicals. When sourcing this compound, ensure the supplier provides proper documentation including safety data sheets, certificates of analysis, and compliance with REACH regulations. Work with established distributors who understand the handling requirements and can provide technical support for your specific application needs.