For professionals in the chemical industry, understanding the precise characteristics and applications of key organic intermediates is fundamental to successful manufacturing and product development. 4-Aminotoluene-3-sulfonic Acid, identified by its CAS number 88-44-8, is a compound of significant importance, particularly in the pigment and dye manufacturing sectors. This article delves into the chemical profile of this intermediate, offering insights for potential buyers on its properties and how to effectively source it from leading global suppliers.

The chemical identity of 4-Aminotoluene-3-sulfonic Acid is defined by its molecular formula C7H9NO3S and a molecular weight of 187.22 g/mol. It presents as a light gray or off-white powder, with a typical purity exceeding 98%. This high level of purity is essential for its primary function as an intermediate in the synthesis of high-quality organic pigments, such as Pigment Red 57:1 (C.I.57:1). The specific arrangement of functional groups—an amine, a methyl group, and a sulfonic acid group on a toluene ring—renders it highly reactive and suitable for complex chemical transformations required in colorant production.

Key physical and chemical properties often sought by buyers include its density, which is reported around 1.431 g/cm³, and its solubility characteristics. The low insoluble matter content (＜0.1%) and minimal water content (＜1.0%) are critical indicators of its quality and suitability for sensitive applications. Manufacturers that specialize in producing this compound adhere to rigorous quality control measures to ensure these specifications are met consistently. For businesses looking to buy, requesting a detailed Certificate of Analysis (CoA) from a supplier is standard practice to verify the product's quality and purity.

The industrial significance of 4-Aminotoluene-3-sulfonic Acid is primarily derived from its role as a precursor for manufacturing vibrant red pigments and dyes. These colorants are widely used in printing inks, paints, coatings, plastics, and the textile industry. The demand for these applications drives the market for reliable suppliers of this intermediate. When seeking to purchase, it is advisable to consider manufacturers and suppliers based in China, as they often provide competitive pricing, large-scale production capabilities, and efficient export services, making them ideal partners for global procurement needs.

In conclusion, 4-Aminotoluene-3-sulfonic Acid (CAS 88-44-8) is a chemically vital intermediate characterized by its high purity and specific reactivity. Its essential role in pigment and dye synthesis makes it a sought-after compound. By understanding its chemical profile and leveraging the capabilities of reputable manufacturers and suppliers, businesses can ensure they acquire a high-quality product that meets their production requirements effectively and affordably.