Carteolol impurities refer to the unwanted substances or molecules that may be present in a sample of Carteolol. These impurities can affect the quality, safety, and efficacy of the drug. Identifying and quantifying these impurities is important for ensuring the purity and potency of the drug. Various analytical techniques such as HPLC, GC, and NMR are used for the detection and characterization of Carteolol impurities.