Dear Researcher, Impurities in pharmaceuticals are unwanted chemicals that remain with the active pharmaceutical ingredients (APIs) or develop during formulation or upon aging of both API and formulation. N-nitrosamines, which are classified as carcinogens by IARC and US EPA, can be easily found in various foods. They are common in water and foods, including cured and grilled meats, dairy products, vegetables, pharmaceuticals and excipients. TRC offers a large selection of these reference impurities (standards, labelled products & metabolites) to aid your qualitative and quantitative research. If you can't find what you are looking for, we request you to contact us for new product suggestions. | 
