Octadecanedioic Acid, identified by CAS number 871-70-5, is a saturated, long-chain aliphatic dicarboxylic acid with the molecular formula C18H34O4 and a molecular weight of approximately 314.46 g/mol. It presents as a white crystalline solid, with a melting point typically ranging from 123-127°C. Unlike shorter-chain dicarboxylic acids such as adipic or succinic acid, Octadecanedioic Acid exhibits lower water solubility but is readily soluble in various organic solvents. This hydrophobic nature is a key characteristic that influences its applications.

The chemical properties of Octadecanedioic Acid enable it to participate in a variety of chemical reactions, including esterification and amidation, common to carboxylic acids. However, its extended carbon chain can introduce steric hindrance, potentially influencing reaction rates and requiring specific catalytic conditions.

Several synthesis routes are employed for its production. One common method involves the oxidative cleavage of oleic acid or other C18 unsaturated fatty acids. Alternative methods include the carbonylation of 1,17-octadecadiene and electrochemical synthesis. Research is also ongoing into more sustainable green chemistry approaches, such as photocatalytic and enzymatic oxidation, aiming for milder reaction conditions and reduced environmental impact.

When comparing Octadecanedioic Acid with shorter-chain diacids, the differences are significant. For instance, in polymer applications, the longer chain of Octadecanedioic Acid leads to polyesters and polyamides with lower melting points, enhanced flexibility, and improved hydrophobicity. This contrasts with polymers derived from shorter diacids, which tend to be more rigid and have higher melting points.

As a vital intermediate, understanding the 871-70-5 chemical properties is essential for leveraging its full potential. NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to producing high-quality Octadecanedioic Acid, supporting industries that rely on its unique characteristics, from pharmaceuticals to advanced material science.