Audited Supplier
| English Name | CAS Number | Customs Code | Molecular Formula | Molecular Weight | Appearance | Boiling Point | Melting Point | Density (g/cm³) | Solubility | Main Differences | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dimethyl carbonate (DMC) | 616 - 38 - 6 | 2920909090 | C3H6O3 | 90.08 | Colorless transparent liquid with a slight smell | 90.1 °C | 4 °C | 1.069 | Sparingly soluble in water, miscible with many organic solvents | Smallest molecular weight among these; relatively low boiling point; mainly used as a methylation and carbonylation reagent | |
| Diethyl carbonate (DEC) | 105 - 58 - 8 | 2920909090 | C5H10O3 | 118.13 | Colorless liquid with a special odor | 126 °C | - 43 °C | 0.975 | Insoluble in water, miscible with common organic solvents | Larger molecular size compared to DMC; higher boiling point due to more carbon atoms | |
| Ethyl methyl carbonate (EMC) | 623 - 53 - 0 | 2920909090 | C4H8O3 | 104.1 | Colorless transparent liquid | 109 - 110 °C | - 55 °C | 0.97 | Insoluble in water | Intermediate molecular weight between DMC and DEC; boiling point also in between | |
| Propylene carbonate (PC) | 108 - 32 - 7 | 2920909090 | C4H6O3 | 102.09 | Colorless, odorless, flammable liquid | 241.7 °C | - 49.2 °C | 1.200 | Miscible with some organic solvents, moderate solubility in water and carbon tetrachloride | Has a cyclic structure, much higher boiling point compared to linear esters; used in applications like CO removal and as a battery medium | |
| Ethylene carbonate (EC) | 96 - 49 - 1 | 2920909090 | C3H4O3 | 88.06 | Colorless transparent or white crystalline solid | 248 °C | 36 - 38 °C | 1.3218 | Soluble in some organic solvents | Is a solid at room temperature unlike others; cyclic structure; important in lithium-ion battery electrolytes |
Yuhan Technology deals in carbonate, lithium battery, and perovskite chemical raw materials
Dimethyl carbonate (DMC), Diethyl carbonate (DEC), Ethyl methyl carbonate (EMC), Propylene carbonate (PC), and Ethylene carbonate (EC) all belong to the class of organic carbonates. Organic carbonates are a type of organic compound that contains the carbonate functional group ($-O - C(=O) - O -$). They are widely used in various fields such as organic synthesis, pharmaceuticals, coatings, and the lithium - ion battery industry due to their unique chemical and physical properties.
Differences- Molecular Structure and Composition:
- DMC is a simple linear ester with the structure \(CH_3O - CO - OCH_3\).
- DEC has a linear structure with two ethyl groups, \(C_2H_5O - CO - OC_2H_5\).
- EMC has both an ethyl and a methyl group, \(C_2H_5O - CO - OCH_3\).
- PC is a cyclic carbonate with a five - membered ring structure, containing a propylene group.
- EC is also a cyclic carbonate with a four - membered ring structure.
- Physical Properties:
- Boiling Points: Generally, the boiling points increase in the order of DMC < EMC < DEC < PC < EC. DMC has a relatively low boiling point of 90.1 °C, while EC has a high boiling point of 248 °C.
- Melting Points: DMC has a melting point of 4 °C, DEC is - 43 °C, EMC is - 55 °C, PC is - 49.2 °C, and EC is 36 - 38 °C. EC is a solid at room temperature, while the others are liquids.
- Density: The densities also vary. For example, DMC has a density of 1.069 g/cm³, while EC has a density of 1.3218 g/cm³.
- Solubility: DMC is sparingly soluble in water and miscible with many organic solvents. DEC is insoluble in water and miscible with common organic solvents. EMC is insoluble in water. PC has moderate solubility in water and is miscible with some organic solvents. EC is soluble in some organic solvents.
- Chemical Reactivity: All of these compounds are carbonates and can undergo hydrolysis, alcoholysis, and other reactions. However, their reactivity may vary depending on the substituents and the structure. For example, DMC is more reactive in methylation and carbonylation reactions compared to DEC due to the presence of the methyl group.
Uses
- DMC:
- It is widely used as a methylation and carbonylation reagent in organic synthesis, replacing toxic and harmful methylating agents such as dimethyl sulfate.
- It is used as an additive in gasoline to improve its octane number and reduce emissions.
- It is a raw material for synthesizing polycarbonates, polyurethanes, and other polymers.
- It can also be used as a low - toxic solvent in the coating industry and pharmaceutical industry.
- DEC:
- Mainly used as an intermediate for organic synthesis and drug synthesis. For example, it is used in the synthesis of some pharmaceutical intermediates and fine chemicals.
- It can be used as a solvent for resins, oils, nitrocellulose, and cellulose ethers. It has good dissolving properties for these substances.
- EMC:
- It is an important additive for lithium - ion battery electrolytes. It helps to improve the conductivity and stability of the electrolyte, enhancing the performance of lithium - ion batteries.
- It is also used in the fields of solvents and organic synthesis intermediates, similar to DMC and DEC, but its application is more focused on the battery industry.
- PC:
- It is used as an efficient solvent to remove carbon dioxide from petroleum gas, pyrolysis gas of petroleum, oil - field gas, and raw material gas for synthetic ammonia. It has a high selectivity and absorption capacity for carbon dioxide.
- It is an excellent medium for lithium - ion batteries, providing good ionic conductivity and stability. It is also used as a plasticizer, spinning solvent, and in other fields.
- EC:
- It is mainly used in the fields of organic synthesis, gas separation, and electrochemistry. In the lithium - ion battery industry, it is an important component of electrolytes, helping to form a stable SEI film on the electrode surface and improve the cycle performance of the battery.
- It can also be used as a monomer for preparing polycarbonate ethylene, which has applications in the field of polymers.
Q1: Can I get some samples?
A: Yes, sure. Usually, we can provide free samples for less than 5 kg, but the customer needs to pay for the shipping.
Q2: What is your MOQ?
A: The minimum order quantity varies for different products, with most requiring a minimum of 1 ton. However, we can accommodate smaller quantities, such as 100kg, with a 100% sample charge.
Q3: How to confirm product quality before placing an order?
A: You can obtain free samples of the products, but you need to cover the shipping fee or arrange for the samples to be sent to us by express. Additionally, you can provide us with your product specifications and requirements, and we will manufacture the products accordingly.
Q4: Is there a discount for bulk purchases? How much is the discount?
A: Yes, we offer discounts for bulk purchases. The discount is determined by evaluating factors such as purchase volume, product type, and cooperation period. Generally, the larger the purchase volume, the greater the discount.
Q5: How do I start paying?
A: Payment can be made by wire transfer, Western Union, PayPal, Visa, Mastercard, T/T, Apple Pay, Google Pay, etc.
Q6: What is the shipping time?
A: We ship the products out within 1-3 days and provide a tracking number. Shipping time varies by country.
Q7: What qualifications and certifications does the company have? Such as ISO certification, etc.
A: Our supply manufacturers hold several authoritative certifications to ensure our products and services meet international standards and industry regulations. This includes the ISO 9001 Quality Management System certification, which indicates we have reached internationally recognized levels in product quality control, production process management, and continuous improvement, providing stable and reliable quality assurance for customers.
Q8: How about the after-sale service of products?
A: After purchasing products from our company, you will be supported by our professional technical team and after-sales team, who will help solve any problems you may encounter.
