Dimethyl carbonate

Dimethyl carbonate is an organic chemical compound with the molecular formula C3H6O3 and CAS number 616-38-6. It belongs to the carbonate ester family and has a molecular weight of 90.08 g/mol. This versatile chemical serves as an environmentally friendly solvent and reagent in various industrial applications. Dimethyl carbonate is classified as a flammable liquid (Flam. Liq. 2) under GHS regulations, requiring appropriate safety precautions during handling and storage.

Dimethyl carbonate is a colorless liquid at room temperature with a characteristic mild, pleasant odor. It has excellent solubility properties, being miscible with most organic solvents including alcohols, ethers, and hydrocarbons, while having limited solubility in water. The compound exhibits low toxicity compared to traditional solvents and has a relatively low boiling point. Its chemical structure makes it both a good solvent and a reactive intermediate in organic synthesis.

Dimethyl carbonate serves multiple industrial applications as an eco-friendly solvent, chemical intermediate, and fuel additive. It is widely used in pharmaceutical synthesis, polymer production, and as a methylating agent in organic chemistry. The compound also functions as a solvent in paints, coatings, and adhesives, replacing more toxic alternatives. Additionally, dimethyl carbonate is employed in lithium battery electrolytes and as an oxygenate additive in gasoline formulations to improve combustion efficiency.

Dimethyl carbonate must be handled with appropriate safety measures due to its flammable liquid classification (Flam. Liq. 2). Always wear suitable personal protective equipment including safety goggles, chemical-resistant gloves, and flame-resistant clothing. Work in well-ventilated areas or under fume hoods to prevent vapor accumulation. Keep away from ignition sources, heat, and open flames. Use non-sparking tools and ensure proper grounding of equipment to prevent static electricity buildup during transfer operations.

Dimethyl carbonate should be stored in a cool, dry, well-ventilated area away from heat sources, ignition sources, and direct sunlight. Use appropriate containers made of compatible materials and ensure they are properly sealed to prevent evaporation and contamination. Store separately from strong oxidizing agents, strong acids, and bases to avoid incompatible reactions. Maintain storage temperatures below 25°C when possible and implement proper fire prevention measures in storage areas.

Dimethyl carbonate exposure requires immediate response depending on the contact route. For skin contact, remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. If eye contact occurs, rinse immediately with clean water for 15-20 minutes and seek medical attention. For inhalation, move the person to fresh air immediately. If ingestion occurs, do not induce vomiting and seek immediate medical attention while providing the safety data sheet to healthcare providers.

Dimethyl carbonate waste must be disposed of according to local, national, and international environmental regulations. Contact licensed hazardous waste disposal companies for proper treatment and disposal. Do not discharge into drains, waterways, or soil as this may cause environmental contamination. Small quantities can sometimes be recovered through distillation for reuse. Always consult the safety data sheet and local environmental authorities for specific disposal requirements and approved disposal facilities in your region.

Dimethyl carbonate is classified under ADR transportation regulations as Class 3 (flammable liquids), Packing Group II. This classification requires specific packaging, labeling, and documentation for road transport. Use UN-approved containers with proper marking and hazard labels including the GHS02 flame pictogram. Transport vehicles must comply with ADR requirements including proper ventilation, fire extinguishing equipment, and driver training. Ensure all shipping documents include the correct UN number and hazard classification information.

Dimethyl carbonate is subject to standard chemical regulations including REACH registration in Europe and CLP classification requirements. It is classified as Flam. Liq. 2 with the signal word 'Danger' and requires GHS02 pictogram labeling. The substance is not currently listed as a Substance of Very High Concern (SVHC) under REACH. Manufacturers and importers must comply with registration, evaluation, and authorization requirements. Users must follow workplace safety regulations and provide appropriate safety information to workers.

Dimethyl carbonate is available through OYSI, a specialized European distributor of technical chemicals serving industrial customers across Europe. OYSI provides reliable supply chains and technical support for dimethyl carbonate procurement. As a professional chemical distributor, OYSI ensures proper handling, documentation, and regulatory compliance for all shipments. Contact OYSI directly for availability, specifications, packaging options, and delivery arrangements to meet your specific industrial requirements throughout European markets.