Maleic Acid, identified by CAS number 110-16-7, is a fundamental organic compound characterized by its cis-isomer structure and dual carboxylic acid functionality. Understanding its chemical and physical properties is essential for chemists, formulators, and procurement specialists across various industries. As a leading manufacturer and supplier, we aim to provide comprehensive insights into this versatile chemical.

Physically, Maleic Acid typically presents as a white crystalline powder or solid. It exhibits good solubility in water, ethanol, and acetone, but is sparingly soluble in benzene. Its melting point ranges from 130-140°C, and it has a boiling point of approximately 275°C. The density is around 1.59 g/mL at 25°C. These physical attributes are important for handling, storage, and formulation processes.

Chemically, Maleic Acid is a dicarboxylic acid with the molecular formula C4H4O4 and a molecular weight of 116.07 g/mol. Its key feature is the cis-configuration around the central carbon-carbon double bond, which influences its reactivity. This double bond can undergo addition reactions, and the carboxylic acid groups can participate in esterification, amidation, and salt formation. A critical reaction for industrial applications is its conversion to fumaric acid (the trans-isomer) through thermal isomerization.

The industrial relevance of Maleic Acid stems directly from its chemical reactivity. It is a critical precursor for unsaturated polyester resins (UPRs), where it co-polymerizes with glycols and other monomers to form thermosetting polymers. These UPRs are vital in manufacturing composites, coatings, and adhesives. Maleic Acid is also a building block for producing other organic acids like tartaric acid, malic acid, and succinic acid, all of which have extensive applications in food, pharmaceuticals, and industrial processes.

In addition to resin and organic acid production, Maleic Acid finds use in agrochemicals, as a component in certain dyes, and as a preservative. Its ability to form copolymers with a variety of vinyl monomers also opens avenues for specialized polymer applications.

As a manufacturer and supplier, we are dedicated to providing high-purity Maleic Acid that meets international quality standards. We understand the technical requirements for its various applications and are committed to ensuring a reliable supply chain. For businesses looking to buy Maleic Acid, understanding its fundamental chemistry and properties empowers informed sourcing decisions. Contact us to learn more about our Maleic Acid products and pricing.