Ans: Malonic acid derivatives are widely used in the synthesis of APIs, which are the key components of pharmaceutical drugs. It exhibits excellent solubility in both water and organic solvents, making it highly suitable for formulation development. Its solubility characteristics enable the creation of stable and effective drug formulations, enhancing the bioavailability and therapeutic efficacy of pharmaceutical products. This attribute has attracted the attention of pharmaceutical companies, leading to an increased demand for malonic acid in the industry.