Dimethyl Carbonate (DMC)

   CAS No.: 616-38-6
   Synonyms / IUPAC Name: Carbonic acid dimethyl ester
   Molecular Formula: C₃H₆O₃
   Molecular Weight: ~90.08 g/mol
   Appearance: Colourless clear liquid

Physicochemical Properties (Typical)

• Melting Point: ~2 – 4 °C
• Boiling Point: ~90 °C
• Density: ~1.069 g/cm³ at 25 °C
• Solubility in Water: Slightly soluble (~13.9 g/100 mL)
• Flash Point: ~17 °C (closed cup)
• Other Notes: Vapour heavier than air; acts as a low-toxicity, fast-evaporating solvent with good solvency for many resin systems.

Purity & Quality Standards

• Typical Purity: ≥99.0% (GC)
• Appearance: Clear liquid, free from visible particulates or haze.
• Specification Indicators: Moisture content, non-volatile matter, assay (DMC content).
• Storage Recommendation: Store sealed in a cool (<30 °C), dry and well-ventilated area; avoid ignition sources.

Applications / Uses

• Used as an environmentally friendly solvent or co-solvent in paints, coatings, adhesives and inks, valued for fast drying and low VOC profile.
• Serves as a methylating, carbonylating or methoxylating agent in organic synthesis and specialty chemical manufacturing.
• Applied in battery electrolyte formulations and electronics manufacturing for its high purity and safety profile.
• Utilised as a green chemical intermediate replacing hazardous reagents such as methyl halides or phosgene derivatives.

Safety & Handling

• Flammability: Highly flammable liquid and vapour; vapour may travel along surfaces and flash back.
• Health Hazards:
• Inhalation: May cause dizziness or nausea at elevated vapour concentrations.
• Skin Contact: Prolonged or repeated exposure may cause mild irritation.
• Eye Contact: May cause irritation.
• Precautions:
• Use in well-ventilated areas or with local exhaust systems.
• Wear protective gloves, goggles, and suitable protective clothing.
• Keep away from heat, sparks, open flames, and hot surfaces; ground/bond containers during transfer.
• Reactivity / Incompatibilities: Avoid strong oxidising agents, strong acids or bases; high temperatures may cause decomposition releasing hazardous gases.

Packaging & Storage

• Packaging: Supplied in sealed solvent-compatible containers (e.g., steel drums, ISO tanks) suitable for industrial use.
• Storage Conditions: Store in a cool (<30 °C), dry, well-ventilated environment, away from direct sunlight and ignition sources; keep container tightly closed when not in use.
• Shelf Life: Stable under recommended conditions; verify container integrity and appearance before use after prolonged storage.