Thalidomide-O-C8-COOH is primarily utilized in the development of targeted drug delivery systems, particularly in cancer therapy. Its structure allows for conjugation with other therapeutic agents, enhancing their specificity and efficacy in reaching tumor cells while minimizing damage to healthy tissues. This compound is also explored in the design of prodrugs, where it can be chemically modified to release the active drug in a controlled manner, improving pharmacokinetics and reducing side effects. Additionally, it finds application in research focused on immunomodulation, aiding in the study of inflammatory and autoimmune diseases by influencing cytokine production and immune cell activity. Its versatility makes it a valuable tool in both therapeutic and experimental settings.