Nabumetone is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and inflammation in conditions such as arthritis. Like all drugs, it may contain impurities, which are unwanted substances that can affect the quality and safety of the medication. Nabumetone impurities can include related compounds, degradation products, or residual solvents from the manufacturing process. It is important for pharmaceutical companies to control and monitor these impurities to ensure the safety and efficacy of the drug.