Ethylene Carbonate (EC) is a cyclic carbonate ester with the chemical formula $C_3H_4O_3$. It is a critical industrial chemical that appears as a colorless to yellowish crystalline solid at room temperature, transitioning into a transparent, low-viscosity liquid above its melting point of approximately $36^circ text{C}$. Historically valued for its high polarity and chemical stability, EC has gained global prominence as a primary component in the electrolyte formulations of lithium-ion batteries. Its unique ability to facilitate the formation of a stable Solid Electrolyte Interphase (SEI) on graphite anodes is indispensable for modern energy storage. Beyond electrochemistry, EC serves as a high-boiling, low-toxicity solvent and a versatile intermediate in organic synthesis. It is increasingly favored in “green chemistry” initiatives due to its biodegradability and low odor profile, replacing more hazardous solvents in polymer processing, surface coatings, and the production of specialized chemical derivatives.
High Dielectric Constant: With a value of approximately $90$, it effectively dissociates electrolyte salts, significantly enhancing ionic conductivity in battery cells.
Superior SEI Formation: Essential for creating a protective layer on battery anodes, which prevents electrolyte degradation and extends cycle life.
High Thermal Stability: Features a high boiling point ($243^circ text{C}$) and high flash point, providing safety and performance stability in high-temperature environments.
Eco-Friendly Profile: Classified as biodegradable and exhibiting low toxicity, it serves as a sustainable alternative to traditional halogenated solvents.
Excellent Solvency: Capable of dissolving a wide range of polymers and resins, making it a versatile processing aid.
CAS Number: 96-49-1
Molecular Weight: $88.06 text{ g/mol}$
Physical Properties: Melting point of $36text{–}39^circ text{C}$; Density of $1.32 text{ g/cm}^3$ (liquid at $40^circ text{C}$).
Purity Grades: Produced in “Battery Grade” ($geq 99.99%$) with moisture content typically below $10 text{ ppm}$, and “Industrial Grade” ($geq 99.5%$).
Viscosity: $1.9 text{ mPa}cdottext{s}$ at $40^circ text{C}$, allowing for efficient flow when blended with linear carbonates like DMC or DEC.
Vapor Pressure: Extremely low at room temperature ($0.02 text{ mmHg}$ at $36^circ text{C}$), minimizing volatile organic compound (VOC) emissions.
• Electrical and electronics
• Connectors, switches, PCB housings, terminal blocks
• Automotive
• Under-hood components, interior assemblies, cable conduits
• Wire and cable
• Insulation layers, sheathing, jacketing materials
• Construction
• Plastic fittings, conduits, insulation panels
• Consumer appliances
• Enclosures, adapters, plugs, casings
• Industrial components
• Fiber-reinforced composites, flame-retardant masterbatches
• Compatible polymers
• PA6, PA66
• PBT, PET
• PE, PP
• Blends and copolymers requiring halogen-free flame retardancy
Have a question or need a quote? Our team is here to help with product details, pricing, and global delivery options.
Your email address will not be published. Required fields are marked *
