What is Ethylene Carbonate EC CAS 96-49-1?

Ethylene Carbonate, commonly abbreviated EC, is a cyclic carbonate with molecular formula C3H4O3. It is supplied as a high-polarity solvent and electrolyte component, principally for lithium-ion and capacitor applications, rather than as a ready-mixed electrolyte.

Why is Ethylene Carbonate used in lithium-ion battery electrolytes?

EC has a high dielectric constant that helps dissolve lithium salts and support ionic conductivity. It also participates in forming a stable solid-electrolyte interphase on graphite anodes, which improves cycling stability and cell life.

Is Ethylene Carbonate interchangeable with Propylene Carbonate?

No. Both are cyclic carbonates, but EC and propylene carbonate differ in melting point, viscosity and compatibility with graphite anodes. In many lithium-ion systems EC is preferred for its SEI-forming behaviour, so the two should not be substituted without cell testing.

Why is Ethylene Carbonate supplied as a crystalline solid?

Ethylene Carbonate has a melting point around 34-38 deg C, so it is commonly crystalline at normal room temperature and becomes liquid when warmed. The receiving and storage system should be set up for either molten or crystallised material to avoid blockages.

What purity properties matter for battery-grade Ethylene Carbonate?

Battery-grade EC must have tightly controlled water and acid content, often below about 10 ppm for each, plus low trace impurities that can damage the electrolyte. Industrial solvent or synthesis grades use different specifications and should not be assumed suitable for cells.

Ethylene Carbonate (EC) CAS 96-49-1

Ethylene Carbonate, commonly abbreviated EC, CAS 96-49-1, is a cyclic carbonate supplied principally for lithium-ion battery and capacitor electrolyte manufacture. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 96-49-1
Synonyms: 1,3-Dioxolan-2-one, Ethylene glycol carbonate, Carbonic acid ethylene ester
Einecs: 202-510-0
Molecular Formula: C3H4O3
Grade: Industrial Grade; battery grade on specification
Package: 250 kg steel drums / ISO tank

Request a quote

Share:

Product Description

Ethylene Carbonate (EC) CAS 96-49-1 is 1,3-dioxolan-2-one, with EC 202-510-0 and molecular formula C3H4O3.

Synonyms: 1,3-Dioxolan-2-one; Ethylene glycol carbonate; Carbonic acid ethylene ester.

CAS: 96-49-1.

Molecular formula: C3H4O3.

It is a crystalline industrial material at normal room temperature.

It is positioned as a cyclic-carbonate raw material principally for lithium-ion battery and capacitor electrolyte manufacture.

It is not a ready-mixed battery electrolyte and is not assumed interchangeable with propylene carbonate.

It is used in lithium-ion battery electrolyte formulations.

It is used in capacitor-electrolyte and electronics-process solvent systems.

It is used in photoresist-removal and specialty polar-solvent formulations.

It is used in organic synthesis and polymer-processing routes as a named feedstock.

It has a high dielectric constant that helps dissolve lithium salts and support ionic conductivity.

It participates in forming a stable solid-electrolyte interphase on graphite anodes, improving cycling stability and cell life.

It has a melting point around 34-38 C, so it is commonly crystalline at room temperature and becomes liquid when warmed.

Confirm assay, water, colour, chloride or trace-impurity limits and melting behaviour for the required grade.

Set up the receiving and storage system for either molten or crystallised material to avoid blockages.

Use suitable PPE when handling and follow the current SDS.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Ethylene Carbonate EC CAS 96-49-1?

A: Ethylene Carbonate, commonly abbreviated EC, is a cyclic carbonate with molecular formula C3H4O3. It is supplied as a high-polarity solvent and electrolyte component, principally for lithium-ion and capacitor applications, rather than as a ready-mixed electrolyte.
Q:
Why is Ethylene Carbonate used in lithium-ion battery electrolytes?

A: EC has a high dielectric constant that helps dissolve lithium salts and support ionic conductivity. It also participates in forming a stable solid-electrolyte interphase on graphite anodes, which improves cycling stability and cell life.
Q:
Is Ethylene Carbonate interchangeable with Propylene Carbonate?

A: No. Both are cyclic carbonates, but EC and propylene carbonate differ in melting point, viscosity and compatibility with graphite anodes. In many lithium-ion systems EC is preferred for its SEI-forming behaviour, so the two should not be substituted without cell testing.
Q:
Why is Ethylene Carbonate supplied as a crystalline solid?

A: Ethylene Carbonate has a melting point around 34-38 deg C, so it is commonly crystalline at normal room temperature and becomes liquid when warmed. The receiving and storage system should be set up for either molten or crystallised material to avoid blockages.
Q:
What purity properties matter for battery-grade Ethylene Carbonate?

A: Battery-grade EC must have tightly controlled water and acid content, often below about 10 ppm for each, plus low trace impurities that can damage the electrolyte. Industrial solvent or synthesis grades use different specifications and should not be assumed suitable for cells.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

Current Language

Change Language