Dimethyl carbonate

Dimethyl carbonate is an organic carbonate ester with the molecular formula C3H6O3 and CAS number 616-38-6. This chemical compound has a molecular weight of 90.08 g/mol and appears as a colorless, flammable liquid with a mild odor. It is classified as a flammable liquid category 2 under GHS regulations, making it an important industrial solvent and chemical intermediate used in various manufacturing processes.

Dimethyl carbonate is a colorless liquid at room temperature with a characteristic mild, pleasant odor. It has excellent solvent properties and is miscible with most organic solvents including alcohols, ethers, and hydrocarbons. The compound exhibits low toxicity compared to other carbonate esters and has a relatively low boiling point, making it volatile under normal conditions. Its molecular structure allows for good chemical stability under proper storage conditions.

Dimethyl carbonate serves as a versatile chemical intermediate and green solvent in various industrial applications. It is primarily used in the production of polycarbonates, pharmaceuticals, and agrochemicals. The compound also functions as a methylating agent in organic synthesis, replacing more hazardous chemicals like methyl iodide. Additionally, it finds application in lithium battery electrolytes and as an environmentally friendly solvent in paint and coating formulations.

Dimethyl carbonate requires careful handling due to its flammable nature (Flam. Liq. 2 classification). Workers must wear appropriate personal protective equipment including safety goggles, chemical-resistant gloves, and flame-resistant clothing. Work areas should have adequate ventilation and be free from ignition sources. Emergency eyewash stations and fire suppression equipment should be readily accessible. All handling procedures must follow the safety data sheet recommendations and local safety regulations.

Dimethyl carbonate must be stored in a cool, dry, well-ventilated area away from heat sources, sparks, and open flames. Containers should be tightly sealed and made of compatible materials to prevent contamination. Storage areas must comply with flammable liquid storage regulations and be equipped with appropriate fire suppression systems. The product should be kept away from strong oxidizing agents and stored at temperatures below its flash point to minimize fire risks.

Immediate action is required following exposure to dimethyl carbonate. For skin contact, remove contaminated clothing and wash the affected area thoroughly with soap and water. In case of eye contact, flush immediately with clean water for at least 15 minutes and seek medical attention. If inhaled, move the person to fresh air and provide respiratory support if needed. For ingestion, do not induce vomiting and seek immediate medical attention while providing supportive care.

Dimethyl carbonate disposal must comply with local and European waste regulations as it is classified as hazardous waste due to its flammable properties. The material should be collected in appropriate containers and disposed of through licensed hazardous waste contractors. Incineration at authorized facilities capable of handling flammable organic compounds is typically the preferred disposal method. Empty containers must also be handled as hazardous waste and properly decontaminated before disposal.

Dimethyl carbonate is classified under ADR as Class 3 (flammable liquids), Packing Group II, requiring specific transport regulations compliance. Packages must bear appropriate hazard labels including the GHS02 flame pictogram and 'Danger' signal word. Vehicles transporting this material must carry proper documentation, emergency equipment, and be operated by trained personnel. Shipping containers must meet UN specification standards and be properly sealed to prevent leakage during transport.

Dimethyl carbonate is subject to various European chemical regulations including REACH registration requirements and CLP classification standards. It must be labeled with appropriate hazard pictograms (GHS02) and safety information. The substance is not currently listed as a Substance of Very High Concern (SVHC) under REACH. Companies handling this chemical must comply with workplace safety directives and maintain proper safety data sheets for employee protection and regulatory compliance.

Dimethyl carbonate is available through OYSI, a trusted European distributor of industrial chemicals serving various industries across the continent. OYSI provides high-quality dimethyl carbonate with proper documentation, safety data sheets, and regulatory compliance certificates. As a specialized chemical distributor, OYSI ensures reliable supply chains and technical support for customers requiring this versatile organic carbonate ester for their industrial applications and manufacturing processes.