Dichloro(methyl)silane

Dichloro(methyl)silane is an organosilicon compound with the chemical formula CH4Cl2Si and CAS number 75-54-7. This methylchlorosilane derivative has a molecular weight of 115.03 g/mol and contains one methyl group and two chlorine atoms bonded to a silicon atom. It serves as an important intermediate in silicon chemistry and is widely used in the production of silicone polymers and other organosilicon materials.

Dichloro(methyl)silane is typically a colorless liquid at room temperature with a sharp, acrid odor. It has high reactivity with water and moisture, producing hydrogen chloride gas and silanols. The compound is volatile and has low viscosity, making it easy to handle in liquid form. It is soluble in most organic solvents but reacts violently with water and alcohols, requiring careful handling in moisture-free environments.

Dichloro(methyl)silane is primarily used as a building block in the synthesis of silicone polymers and resins. It serves as a key intermediate for producing methylsilicone oils, elastomers, and sealants. The compound is also utilized in surface modification treatments, as a coupling agent for glass and mineral surfaces, and in the manufacture of specialty chemicals. Its reactive chlorine atoms make it valuable for creating silicon-carbon bonds in various industrial applications.

Dichloro(methyl)silane requires careful handling due to its reactivity with moisture and potential to release hydrogen chloride. 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 prevent inhalation of vapors. Avoid contact with water, alcohols, and other reactive materials. Use dry, inert atmospheres when possible and ensure all equipment is moisture-free before use.

Dichloro(methyl)silane must be stored in tightly sealed, moisture-proof containers in cool, dry conditions away from heat sources and direct sunlight. Keep containers in well-ventilated areas and protect from humidity to prevent hydrolysis reactions. Store separately from water, alcohols, bases, and oxidizing agents. Use inert gas blanketing when possible to exclude moisture. Regularly inspect containers for signs of corrosion or leakage due to the compound's reactive nature.

Dichloro(methyl)silane contact requires immediate action due to its potential to form corrosive hydrogen chloride. For skin contact, immediately remove contaminated clothing and flush with plenty of water for at least 15 minutes. If inhaled, move to fresh air immediately and seek medical attention if breathing difficulties occur. For eye contact, rinse thoroughly with water for several minutes and remove contact lenses if present. Seek immediate medical attention for all significant exposures.

Dichloro(methyl)silane disposal must comply with local and national hazardous waste regulations. Never pour down drains or dispose of in regular waste due to its reactive nature and potential environmental impact. Contact licensed hazardous waste disposal companies for proper treatment and disposal. Small quantities can be carefully hydrolyzed under controlled conditions by qualified personnel, but this should only be done with proper safety measures and waste treatment capabilities in place.

Dichloro(methyl)silane is classified under ADR Class 4.3 (substances which, in contact with water, emit flammable gases), Packing Group I, indicating high danger level. Transportation requires specialized packaging that prevents moisture contact and proper hazardous materials documentation. Only authorized carriers trained in dangerous goods handling should transport this substance. Vehicles must carry appropriate emergency equipment and follow designated routes for hazardous materials to ensure safety during transit.

Dichloro(methyl)silane is subject to various chemical regulations including REACH registration requirements in Europe for commercial use. While not classified as an SVHC (Substance of Very High Concern), it must comply with CLP regulation for classification, labeling, and packaging. Industrial users must follow workplace safety regulations and may need permits for storage and handling. Always consult current regulatory databases and safety data sheets for the most up-to-date compliance requirements.

Dichloro(methyl)silane is available through specialized chemical distributors across Europe, including OYSI, a European distributor of technical chemicals. When purchasing, ensure the supplier provides complete documentation including safety data sheets, certificates of analysis, and proper hazardous materials shipping arrangements. Choose suppliers with experience in organosilicon compounds and appropriate storage facilities to guarantee product quality and regulatory compliance for your specific applications.