Displaying 3 results of Thiorphan Impurities Thiorphan is a drug used to treat hypertension and congestive heart failure. However, during the manufacturing process, impurities may be formed that can affect the safety and efficacy of the drug. Thiorphan impurities include related compounds with structural similarities to the active ingredient, as well as byproducts of the synthesis process. These impurities must be carefully controlled and monitored to ensure the quality and purity of the final product.