Displaying 3 results of Lynestrenol Impurities Lynestrenol is a synthetic progestogen used in oral contraceptives. As with any pharmaceutical compound, it is possible for impurities to be present in the final product. These impurities can vary in type and amount, and may arise from various sources including raw materials, manufacturing processes, handling and storage conditions. It is important for pharmaceutical manufacturers to monitor and control impurities to ensure the safety and efficacy of their products. Strict regulatory guidelines are in place to limit the levels of impurities in pharmaceuticals, including Lynestrenol.