Dimethyl Carbonate (DMC)
(CH₃O)₂CO · CAS 616-38-6
Electronic grade DMC is a critical low-viscosity co-solvent in LiPF₆-based lithium-ion battery electrolytes (EC/DMC/EMC system). Its wide electrochemical stability window, low viscosity (0.59 mPa·s at 25 °C), and excellent Li⁺ solvation properties make it indispensable for EV battery cells and energy storage systems.
Molecular Weight
90.08 g/mol
Boiling Point
90 °C
Density
1.069 g/mL
Molecular Formula
Available Grades
Analytical Specification
Analytical Specification Table
All values represent maximum allowable limits unless noted ≥. A lot-specific Certificate of Analysis (CoA) with ICP-MS, LPC, and GC data is issued for every shipment. Full data packages available on request.
| Parameter | Test Method | Unit | G4 | G5 ★ | AR |
|---|---|---|---|---|---|
| Assay (GC) | GC-FID | % | ≥99.99 | ≥99.999 | ≥99.5 |
| Water Content (KF) | Karl Fischer | ppm | ≤20 | ≤10 | ≤500 |
| Total Metals (ICP-MS) | ICP-MS | ppb ea. | ≤0.5 | <0.1 | — |
| Fe (Iron) | ICP-MS | ppb | ≤0.2 | <0.05 | — |
| Ni (Nickel) | ICP-MS | ppb | ≤0.2 | <0.05 | — |
| Chloride (Cl⁻) | IC | ppb | ≤100 | ≤50 | ≤500 |
| Fluoride (F⁻) | IC | ppb | ≤50 | ≤20 | — |
| Acidity (as CH₃COOH) | Titration | ppm | ≤5 | ≤2 | ≤20 |
| Methanol | GC-FID | ppm | ≤20 | ≤5 | ≤100 |
| Residue on Evaporation | Gravimetric | ppm | ≤2 | ≤0.5 | ≤10 |
★ G5 = SEMI C1 Tier D (6N grade). All metal values by ICP-MS. Particle counts by in-line LPC during ISO Class 3 fill. CoA available on request.
Grade Comparison
G1 → G5 Purity Scale
Select the grade that matches your process node and contamination budget. Every grade is available from PureTech with full lot CoA and ICP-MS data.
All grades tested by ICP-MS (28 elements), in-line LPC (ISO Class 3 fill), and Karl Fischer titration. G5 = SEMI C1 Tier D. Full CoA per lot. Request CoA template →
Application Areas
Where Dimethyl Carbonate Is Used
Semiconductor Process
- Polycarbonate synthesis intermediate
- low-toxicity photoresist co-solvent research
Laboratory & Analytical
- Green carbonate solvent for organic synthesis
- carbonylation reaction solvent
Industrial & Other
- EV gigafactory electrode & electrolyte production
- polycarbonate (PC) synthesis
- paint & coatings (low-VOC)
- fuel octane booster
Battery & Energy Storage
Packaging & Supply
Available Container Formats
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