For professionals in the chemical industry, distinguishing between related compounds like Maleic Anhydride and Maleic Acid (CAS 110-16-7) is vital for ensuring accurate material selection and successful product development. While both are derived from similar precursors and share common applications, their distinct chemical structures and properties lead to different functionalities and handling requirements. As a leading supplier of Maleic Acid, we aim to clarify these differences for our B2B clientele.

Maleic Acid is a dicarboxylic acid with the chemical formula C4H4O4. It exists as a cis-isomer and is characterized by two carboxylic acid groups attached to a double bond. Maleic Acid is typically supplied as a white crystalline solid and is known for its solubility in water and other polar solvents. Its primary role as an intermediate includes the production of unsaturated polyester resins (UPRs), as well as its use in the food industry as an acidulant and in agriculture.

Maleic Anhydride, on the other hand, is the anhydride of Maleic Acid, with the formula C4H2O3. It is synthesized through the catalytic oxidation of benzene or n-butane. Maleic Anhydride is usually supplied in molten or flake form and is highly reactive, particularly with water, converting readily to Maleic Acid. Industrially, it is a primary precursor for UPRs, as well as for alkyd resins, agricultural chemicals, and lubricating oil additives.

The key difference lies in their functional groups and reactivity. Maleic Anhydride is generally more reactive and often preferred for applications where its anhydrous nature is advantageous, such as in direct polymerization processes for UPRs. Maleic Acid, while less reactive as an anhydride, offers greater stability and ease of handling in some formulations, particularly in aqueous systems or when a less reactive form is desired.

When purchasing, buyers must consider the specific requirements of their application. If the process involves aqueous solutions or requires the specific properties of the free acid, Maleic Acid is the preferred choice. If the application benefits from the high reactivity of the anhydride and the potential for water-free reactions, Maleic Anhydride would be selected. Both are essential chemical building blocks, but their selection depends on the intended use and processing conditions.

As a trusted manufacturer and supplier, we focus on providing high-purity Maleic Acid to meet diverse industrial needs. We understand the importance of making informed material choices. If your application requires Maleic Acid, we encourage you to contact us to discuss product specifications, pricing, and to arrange for bulk purchases. Our expertise ensures you receive the quality material needed for your success.