Understanding the fundamental chemistry of the compounds we use is essential for innovation and optimization in industrial applications. Acid Red 118 (CAS 12217-35-5) is a synthetic dye whose efficacy stems from its specific molecular structure and functional groups. NINGBO INNO PHARMCHEM CO.,LTD. is pleased to shed light on the chemistry that makes Acid Red 118 a valuable asset in the dye and colorant sectors.

Acid Red 118 belongs to the azo dye family, characterized by the presence of one or more azo groups (-N=N-) within its molecular structure. The IUPAC name, 6-amino-5-[[3-[ethyl(phenyl)sulfamoyl]-4-methylphenyl]diazenyl]-4-hydroxynaphthalene-2-sulfonic acid, reveals a complex organic molecule with several key functional groups. These include amino (-NH2), hydroxyl (-OH), and sulfonic acid (-SO3H) groups, along with the defining azo linkages. The sulfonic acid group is particularly important as it renders the dye water-soluble and provides its acidic nature, allowing it to bond with positively charged sites on protein and polyamide fibers, such as wool, silk, and nylon.

The molecular formula C25H24N4O6S2 and a molecular weight of approximately 540.61 g/mol are critical identifiers for Acid Red 118. The presence of these multiple functional groups contributes to its ability to absorb and reflect specific wavelengths of light, resulting in its characteristic vibrant red color. The overall structure dictates its affinity for certain substrates and its stability under various conditions. When companies look to buy Acid Red 118, they are essentially seeking this specific molecular architecture for its performance benefits.

The term 'acid dye' refers to dyes that are applied from an acidic dye bath. The acidic environment protonates the amino groups on fibers like wool and silk, creating anionic sites that strongly attract the anionic sulfonic acid groups on the dye molecule. This ionic interaction forms a stable bond, leading to good wash fastness and lightfastness. Understanding these Acid Red 118 properties is crucial for textile technologists and color chemists.

For those interested in the chemical synthesis of Acid Red 118, it typically involves diazotization and coupling reactions common in azo dye manufacturing. Reliable Acid Red 118 manufacturers ensure precise control over these processes to achieve high purity and desired characteristics. When sourcing this dye, it is beneficial to inquire about its chemical synthesis route and quality control measures from Acid Red 118 suppliers.

NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to providing access to chemicals with well-defined structures and functionalities. Acid Red 118 exemplifies a well-understood synthetic dye whose chemistry underpins its widespread industrial use. By understanding its molecular makeup, industries can better optimize its application and explore its potential in new formulations.