N-(Cyclohexylthio)phthalimide, commonly known as CTP, is a specialty chemical primarily used as a vulcanization retarder in the rubber industry. It inhibits premature crosslinking of rubber compounds during storage and processing, enabling better control over the vulcanization process. This enhances the quality, processability, and performance of rubber products such as tires, hoses, belts, and seals. While it may have minor applications in organic synthesis, its key role is as a niche additive in rubber production to prevent scorch and improve manufacturing efficiency.