Safety Data Sheet (SDS) for Dimethyl Carbonate

1. Product Identification Dimethyl carbonate (DMC) is a colorless, flammable liquid with a slightly sweet odor. Its chemical formula is C3H6O3, and it has a molecular weight of 90.08 g/mol. DMC is widely used as a solvent in various chemical processes, as a reagent in organic synthesis, and as a potential clean alternative to traditional carbonylation processes. It is also used in the production of polycarbonate plastics and as a methylating agent.

2. Hazards Identification - Classification Dimethyl carbonate is classified as a flammable liquid (Category 2) and a skin irritant (Category 2). It poses risks through inhalation, skin contact, and ingestion.

- Hazard Statements H225 Highly flammable liquid and vapor. H315 Causes skin irritation. H336 May cause drowsiness or dizziness.

3. Composition/Information on Ingredients - Common Name Dimethyl carbonate - CAS Number 616-38-6 - Percent Composition 100%

4. First Aid Measures - Inhalation If inhaled, move the affected person to fresh air immediately. If symptoms persist, seek medical attention. - Skin Contact Remove contaminated clothing and rinse skin with plenty of water for at least 15 minutes. Seek medical advice if irritation persists. - Eye Contact Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing and seek medical attention. - Ingestion Do not induce vomiting. Rinse mouth and seek medical attention immediately.

5. Firefighting Measures - Extinguishing Media Use dry chemical, foam, or carbon dioxide. Water can be ineffective but may be used to cool containers that are exposed to flames. - Special Firefighting Procedures Wear full protective clothing and self-contained breathing apparatus. Stay upwind of the fire and avoid inhaling fumes. Dimethyl carbonate can form flammable vapor-air mixtures.

6. Accidental Release Measures In the event of a spill or leak - Evacuate non-essential personnel and isolate the release area. - Prevent further leakage or spillage if it is safe to do so. - Use appropriate personal protective equipment (PPE). - Contain the spill using sand, earth, or other suitable absorbent materials and place in a container for disposal as hazardous waste.

7. Handling and Storage - Handling Avoid contact with skin and eyes. Ensure good ventilation in workplaces and avoid inhalation of vapors. - Storage Store in a cool, well-ventilated place away from sources of ignition and incompatible materials, such as strong oxidizers. Keep containers tightly closed.

8. Exposure Controls/Personal Protection - Exposure Limits OSHA PEL and ACGIH TLV have not been established for dimethyl carbonate. - Personal Protective Equipment - Respiratory Protection If ventilation is inadequate, use a respiratory protection device. - Hand Protection Use chemical-resistant gloves. - Eye Protection Wear safety goggles or face shield. - Skin Protection Use protective clothing to prevent skin exposure.

9. Physical and Chemical Properties - Appearance Colorless liquid - Odor Sweet - Boiling Point 90°C (194°F) - Melting Point -4°C (25°F) - Flash Point 4.5°C (40.1°F) - Solubility Miscible with water, ethanol, and acetone.

10. Stability and Reactivity - Stability Dimethyl carbonate is stable under recommended storage conditions. - Incompatibility Contact with strong oxidizing agents may lead to hazardous reactions. - Decomposition Products In the event of combustion, harmful gases such as carbon dioxide and carbon monoxide may be produced.

11. Toxicological Information - Acute Toxicity Inhalation can cause respiratory irritation and central nervous system effects. - Skin Irritation Prolonged exposure may lead to irritation or dermatitis. - Carcinogenicity Not classified as a carcinogen by any agency.

Conclusion Understanding the properties, hazards, and safety measures associated with dimethyl carbonate is essential for safe handling and use. Always refer to the most current Safety Data Sheet (SDS) for detailed information before working with this chemical to ensure a safe working environment.