Isopulegol is a terpene alcohol used in the fragrance, flavor, and pharmaceutical industries. However, as with many chemicals, it is rarely pure and can contain various impurities. These impurities can be a concern for product quality, safety, and regulatory compliance. Common impurities in isopulegol include other terpenes, alcohols, and ketones. It is important to properly identify and quantify these impurities to ensure product consistency and purity.