4-Chlorothiophenol is primarily used as an intermediate in the synthesis of various organic compounds, particularly in the production of agrochemicals and pharmaceuticals. It serves as a key building block in the development of pesticides, herbicides, and fungicides, contributing to crop protection and agricultural productivity. In the pharmaceutical industry, it is utilized in the synthesis of active pharmaceutical ingredients (APIs) and other therapeutic agents. Additionally, it finds application in the preparation of dyes, pigments, and other specialty chemicals. Its role as a reagent in organic reactions, such as nucleophilic substitution and coupling reactions, makes it valuable in research and industrial chemistry.