2-Methylpyridine-4-sulfonic acid is primarily used as an intermediate in the synthesis of various pharmaceuticals and agrochemicals. Its sulfonic acid group makes it a valuable building block for creating compounds with enhanced solubility and reactivity. In the pharmaceutical industry, it is often employed in the production of drugs targeting specific enzymes or receptors, particularly in the development of anti-inflammatory and antimicrobial agents. Additionally, it serves as a key component in the manufacture of dyes and pigments, where its structure contributes to the stability and color properties of the final product. In agrochemicals, it is utilized in the formulation of herbicides and pesticides, aiding in the effective delivery and activity of these compounds. Its versatility in chemical reactions also makes it useful in organic synthesis for creating complex molecules with specific functional groups.