CAS: 623-53-0 Ethyl Methyl Carbonate Detailed Explanation

Ethyl Methyl Carbonate (abbreviated as EMC), with the Chinese name Ethyl Methyl Carbonate and CAS number 623-53-0, is an important organic carbonate compound. Its chemical formula is C₄H₈O₃ and its molecular weight is 104.10. It is widely used in chemical industry, new energy and other fields, with both environmental protection and practicality, and is one of the green chemical raw materials that have attracted much attention in recent years.

In terms of physical and chemical properties, Ethyl Methyl Carbonate is a colorless and transparent liquid with no obvious odor. It is relatively stable under normal temperature and pressure, with a melting point of about -14.5℃, a boiling point of 107℃, a density of 1.006 g/mL (25℃), a refractive index of n20/D 1.378, and a flash point of 23℃. It is slightly soluble in water, with a water solubility of 46.8-47.1g/L at 20℃, and easily soluble in organic solvents such as alcohols and ethers. It is a aprotic, polar and environment-friendly solvent with strong hygroscopicity, but its long-term storage stability is poor, and it is prone to decomposition reaction under conditions such as light, heat, acid and alkali.

As an asymmetric ester compound, Ethyl Methyl Carbonate has both methyl and ethyl groups, and has the excellent characteristics of dimethyl carbonate and diethyl carbonate. Its core application fields are concentrated in lithium-ion battery electrolytes, organic synthesis and solvent fields. In the field of lithium-ion batteries, it is a key component of electrolytes. Due to its strong solubility for lithium salts and good electrochemical stability, it can effectively improve the energy density, discharge capacity and cycle life of batteries, and at the same time improve the low-temperature service performance of batteries. It is widely used in lithium batteries of portable electronic devices such as mobile phones and laptops, as well as new energy vehicles.

In the field of organic synthesis, Ethyl Methyl Carbonate contains active reaction groups such as methyl, ethyl and carbonyl. It can be used as a fine synthesis intermediate to react with alcohols, phenols, amines and esters to synthesize a variety of organic compounds. In addition, it can also be used as a solvent for special flavors and intermediates, and has applications in coatings, inks, adhesives and other industries. With its unique solubility advantage, it shows better use effect than traditional solvents.

In terms of safety, Ethyl Methyl Carbonate is a flammable liquid. Its vapor can form an explosive mixture with air. It is prone to combustion and explosion when exposed to open flames, high heat or contact with oxidants. Excessively fast flow rate may also generate and accumulate static electricity, and the heated container has explosion risk. Its vapor is heavier than air and tends to accumulate in low-lying areas. During operation, keep away from fire and heat sources, maintain good ventilation, and wear corresponding protective equipment; during storage, it should be sealed and placed in a cool and dry place at 2-8℃, away from oxidants and fire sources. Its transportation number is 3272, which belongs to Class 3 dangerous goods and must be transported and stored in accordance with relevant specifications.

At present, the main production processes of Ethyl Methyl Carbonate include transesterification method, methyl chloroformate and ethanol reaction method, etc. Among them, the transesterification method is widely used due to its mild reaction conditions and high product purity. There are many manufacturers around the world, among which China has the largest number of production enterprises, with leading product quality and output, which can meet the application needs of various industries.