Diethyl maleate is a versatile chemical compound with a wide range of industrial applications. Prepared by reacting maleic anhydride with ethanol, it exists in two isomeric forms: cis and trans structures. The quality of this compound is often assessed through key indicators such as total ester content, acid value, and water content. This article aims to delve into the diverse applications of diethyl maleate, including its role in the synthesis of polyaspartic polyurea, plant growth regulators like Calcium cyclamate, and more. Feiyang has 30 years of experience in manufacturing and marketing diethyl maleate, for more information please visit Diethyl Maleate.

Key Quality Indicators

Understanding the quality metrics of diethyl maleate is crucial:

• Total Ester Content: A content greater than 99% is generally required, encompassing both cis and trans components.
• Acid Value: Should not exceed 0.10 mgKOH/g.
• Water Content: Should be below 0.10% w/w.

Applications of Diethyl Maleate

Polyaspartic Polyurea

In polyaspartic polyurea production, diethyl maleate is indispensable. This application has stringent requirements for acid esters but is more lenient on other quality indicators.

Calcium Cyclamate (Plant Growth Regulator)

For Calcium cyclamate, a plant growth regulator, the diethyl maleate used must meet the following criteria:

• Trans Component: ≤ 0.5%
• Acid Value: ≤ 0.1%
• Water Content: ≤ 0.2%

Malathion

Although largely banned, Malathion, a pesticide, still finds use in some parts of Africa. 

K-Acid (Intermediate of Coragen)

2-Naphthylamine-3,6,8-trisulfonic acid, commonly known as “K acid,” is an organic compound used as a dye intermediate. It is crucial in the production of various dyes, pigments, and colorants for industries like textiles, leather, and paper. K acid is renowned for its excellent light fastness and high tinting strength. In the synthesis of K-Acid, an intermediate of Coragen, diethyl maleate is used in a cyclization reaction, achieving a yield of 60%-65%.

Requirements of this product for the index of diethyl maleate：

• Cis-Content≥98.5%
• Acid Value≤0.1%
• Water Content≤0.2%

Coragen (20% Chlorantraniliprole Suspension)

Coragen is an insecticide developed by DuPont, with chlorantraniliprole as its active ingredient. It is registered for use on lawns, ornamentals, and various food and feed crops. Diethyl maleate serves as an intermediate in the production of Coragen, further showcasing its versatility.

Diethyl maleate is more than just a chemical compound. It’s a multifaceted ingredient with a broad spectrum of applications. From Polyaspartic polyurea to plant growth regulators and from dye intermediates like K acid, its utility is vast and varied. As we continue to explore its potential, diethyl maleate is poised to remain a cornerstone in various chemical applications for years to come.

Feiyang, founded in 1992, mainly focuses on the manufacture of solvent, monomers as well as polymer. Currently, Feiyang has three plants in China with a total manufacture area of 60000 ㎡.

With 30 years of development, Feiyang owns more than 30 technology patents, and professional consultation can be provided for each application series.

For further insights into our company, please visit Diethyl Maleate.

To purchase Diethyl Maleate, please contact: [email protected], [email protected]