Sodium 2-Chlorotoluene-4-sulfonate is primarily used as an intermediate in the synthesis of dyes and pigments. It plays a crucial role in the production of azo dyes, which are widely applied in the textile industry for coloring fabrics. Additionally, it is utilized in the manufacturing of optical brighteners, which enhance the appearance of materials like paper and detergents by making them appear whiter and brighter. The compound also finds applications in the development of certain pharmaceuticals and agrochemicals, where it serves as a building block for more complex molecules. Its sulfonate group contributes to water solubility, making it valuable in formulations requiring enhanced dispersibility or stability in aqueous systems.