1-Chloro-4-nitrobenzene is primarily used as an intermediate in the synthesis of various chemicals and dyes. It plays a crucial role in the production of agricultural chemicals, including herbicides and pesticides, where it acts as a building block for more complex compounds. Additionally, it is utilized in the manufacture of pharmaceuticals, particularly in the creation of certain drugs that require nitro or chloro functional groups for their activity. In the dye industry, it serves as a precursor for azo dyes, which are widely used in textiles, leather, and paper products. Its reactivity and stability make it a valuable component in organic synthesis, enabling the development of diverse chemical products.