Ethyl Methyl Carbonate Battery Grade (EMC)
CAS Number: 623-53-0
Battery-grade ethyl methyl carbonate (EMC) combines the low viscosity of DMC and the moderate boiling point of DEC, making it the preferred co-solvent in EC/EMC and EC/DMC/EMC electrolyte systems for automotive and consumer Li-ion batteries. Its balanced properties support both high-rate and wide-temperature performance.
Technical Specifications
| appearance | Colorless transparent liquid |
| purity (%) | ≥99.95 |
| color (APHA) | ≤10 |
| moisture (ppm) | ≤20 |
| density (g/mL, 20°C) | 1.002–1.006 |
| acidity as HCOOH (ppm) | ≤5 |
Applications
- EC/EMC (3:7) automotive-grade lithium-ion electrolyte
- EC/DMC/EMC ternary standard electrolyte base
- High-voltage (>4.3V) NMC electrolyte formulation
- Fast-charging electrolyte co-solvent
- Wide-temperature-range battery electrolyte
Key Features
- Optimally balanced viscosity (0.65 cP) and boiling point (108°C) for all-climate performance
- Purity ≥99.95% and acid ≤5 ppm ensures compatibility with sensitive NMC811 cathodes
- Dominates automotive-grade 3:7 EC/EMC electrolyte formulations globally
- Stable against oxidation at high potential, supporting 4.4V+ cathode chemistries
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