Linaclotide is a peptide-based drug used for the treatment of irritable bowel syndrome and chronic constipation. However, during the manufacturing process of Linaclotide, impurities may be formed, which can affect the quality, safety, and efficacy of the drug. Therefore, it is essential to identify, monitor, and control these impurities to ensure the purity and potency of Linaclotide. The impurities in Linaclotide can be classified into various categories, such as related substances, degradants, and process-related impurities, among others. The identification and quantification of these impurities require sophisticated analytical techniques and expertise.