Sulfanilic acid, chemically known as 4-aminobenzenesulfonic acid (CAS 121-57-3), is a crucial organic compound with a wide range of industrial applications. Its molecular structure, featuring both an amino group and a sulfonic acid group, endows it with unique chemical properties that make it invaluable in various synthetic processes. As a premier manufacturer and supplier, NINGBO INNO PHARMCHEM CO., LTD. offers high-purity Sulfanilic acid, adhering to stringent quality standards.

The synthesis of Sulfanilic acid typically involves the sulfonation of aniline with concentrated sulfuric acid. This reaction proceeds through phenylsulfamic acid, which then undergoes rearrangement to form Sulfanilic acid. This process highlights its nature as a zwitterion, contributing to its high melting point and stability. Understanding these synthesis pathways can inform procurement decisions, ensuring you select the right grade for your needs.

Key properties of Sulfanilic acid include its appearance as a white or off-white crystalline powder. With a purity assay of ≥99.0%, it is well-suited for demanding applications. Its solubility in water is limited but it dissolves in alkaline solutions. The compound's reactivity, particularly its ability to form diazo compounds, is central to its utility in creating dyes and its role as an intermediate in the production of sulfa drugs.

The industrial applications of Sulfanilic acid are extensive. It is a primary intermediate in the manufacturing of dyes, enabling the creation of a broad spectrum of colors through azo coupling reactions. In the pharmaceutical industry, it serves as a precursor for sulfa drugs, which are critical antibacterial agents. Additionally, it is utilized in the agrochemical sector for pesticides and in analytical chemistry as a reagent for detecting nitrites and nitrates.

For businesses looking to buy Sulfanilic acid, partnering with a reputable manufacturer like NINGBO INNO PHARMCHEM CO., LTD. ensures access to high-quality material at competitive prices. We provide reliable supply and technical support, making us your preferred supplier. We encourage you to inquire about our product details and how we can support your specific chemical needs.