Metanilic Acid, chemically known as 3-aminobenzenesulfonic acid and bearing the CAS number 121-47-1, is a significant organic compound with a broad range of industrial applications. Ningbo Inno Pharmachem Co., Ltd., a leading chemical manufacturer and supplier from China, is at the forefront of producing and distributing this essential intermediate. Understanding the properties, production methods, and overall significance of Metanilic Acid is crucial for industries that rely on its unique chemical characteristics.

At its core, Metanilic Acid is an aromatic amine containing a sulfonic acid group. This bifunctional nature makes it highly reactive and versatile in various chemical synthesis processes. Its appearance is typically described as a pinkish-white powder, and it has a molecular formula of C6H7NO3S. While slightly soluble in water, it dissolves better in alkaline solutions and concentrated acids. Its stability requires storage in cool, dry, and well-ventilated areas, away from incompatible materials.

The manufacturing process of Metanilic Acid generally involves the sulfonation of nitrobenzene to form nitrobenzenesulfonic acid, followed by a reduction step. For instance, nitrobenzene is reacted with concentrated sulfuric acid at elevated temperatures to introduce the sulfonic acid group. The resulting nitrobenzenesulfonic acid is then reduced, often using iron and hydrochloric acid, to convert the nitro group into an amino group, yielding Metanilic Acid. Subsequent purification steps, such as recrystallization, are employed to achieve the desired purity levels, often exceeding 98% assay, which is critical for its downstream applications. The efficiency and yield of these steps are vital for competitive metanilic acid production.

The industrial significance of Metanilic Acid is primarily twofold: its extensive use as a dye intermediate and its role in pharmaceutical synthesis. As previously discussed, it is a vital component in creating a vast array of azo, reactive, and sulfur dyes, contributing vibrant colors to textiles, leather, and other materials. In pharmaceuticals, it serves as a crucial precursor for sulfa drugs, a class of antibiotics vital for treating bacterial infections. This dual applicability underscores why there is consistent demand for metanilic acid wholesale.

The versatility of Metanilic Acid also extends to its potential use in other organic syntheses, where it can act as a building block for specialized chemicals, pigments, and even agricultural compounds. Its specific chemical reactivity allows chemists to introduce both amine and sulfonic acid functionalities into larger molecules, enabling the creation of complex structures with tailored properties.

For businesses looking to source Metanilic Acid, understanding the various suppliers and their quality offerings is key. When considering where to buy metanilic acid, factors such as product purity, consistency, packaging options, and the supplier's reliability are paramount. Ningbo Inno Pharmachem Co., Ltd. strives to meet these demands by offering high-grade Metanilic Acid that adheres to international quality standards, backed by extensive industry experience and a commitment to customer satisfaction.

In conclusion, Metanilic Acid (CAS 121-47-1) is a foundational chemical intermediate whose importance spans across critical industries. Its unique properties, coupled with established manufacturing processes, ensure its continued relevance in producing vibrant colors and essential medicines. As a reliable Chinese supplier, Ningbo Inno Pharmachem Co., Ltd. is dedicated to supporting these industries by providing high-quality Metanilic Acid, thereby contributing to innovation and progress.