Used primarily in the synthesis of pharmaceutical intermediates, especially in the production of antidiabetic drugs like metformin. It serves as a key building block in the preparation of biguanide-based compounds due to its reactive chlorophenyl and biguanide groups. Its hydrochloride form enhances solubility and stability during chemical reactions, making it suitable for use in controlled coupling and condensation processes. Also employed in research settings for developing new bioactive molecules with potential antiviral or anticancer properties.