At NINGBO INNO PHARMCHEM CO.,LTD., we believe that a thorough understanding of chemical properties is foundational to successful application. This article focuses on Benzidine-2,2'-disulfonic acid (CAS 117-61-3), detailing its intrinsic properties and the common pathways for its synthesis. This information is crucial for chemists, researchers, and manufacturers who utilize this versatile compound.

Benzidine-2,2'-disulfonic acid is characterized by its molecular formula C12H12N2O6S2 and a molecular weight of approximately 344.36 g/mol. Visually, it is often described as a lavender or purple powder. A key characteristic is the presence of two sulfonic acid groups (-SO3H) attached to the biphenyl core, alongside two amino groups (-NH2). These functional groups dictate its reactivity and solubility. While it is sparingly soluble in water, its behavior in various solvents and at different pH levels is important for processing. The compound typically appears as a powder and might contain residual water, often around 20-30% in commercial samples, influencing its assay percentage.

The Benzidine-2,2'-disulfonic acid synthesis commonly involves several established chemical routes. One prominent method includes the reduction of 3-nitrobenzenesulfonic acid salts. This process typically utilizes reducing agents like zinc dust in an alkaline medium, followed by an acid-catalyzed rearrangement. Electrochemical reduction is also a viable and often preferred industrial method due to its controllability and scalability. Understanding these Benzidine-2,2'-disulfonic acid synthesis processes allows for the production of high-purity material required for sensitive applications.

The chemical properties of Benzidine-2,2'-disulfonic acid are central to its widespread use. The amino groups allow for facile diazotization, a critical step in forming azo linkages, which are the chromophores in many dyes. The sulfonic acid groups not only enhance solubility but also influence the electron distribution within the molecule, affecting its reactivity in various organic transformations. This makes it a valuable intermediate for a range of chemical products. For professionals looking to buy Benzidine-2,2'-disulfonic acid, ensuring the purity and consistency of these properties is paramount.

In summary, Benzidine-2,2'-disulfonic acid is a compound defined by its specific molecular structure and reactive functional groups. Its lavender powder appearance, solubility characteristics, and established synthesis routes are all vital aspects for its effective use in industries ranging from textiles to advanced materials. NINGBO INNO PHARMCHEM CO.,LTD. provides this essential chemical, supporting the diverse needs of the chemical industry.