Since 1993, C/D/N Isotopes Inc. has provided its customers with superior quality and exceptional service. Researchers in all branches of science and medicine, from around the world, depend on C/D/N Isotopes as the company for deuterium labelled compounds.We currently offer more than 2800 products, with more than 2400 products in stock. As a result, we are able to ship most products within 24 to 48 hours after receipt of order. In fact, 97% of our orders are filled from stock.The majority of the products listed on this website are manufactured exclusively by C/D/N Isotopes. Over the years, we have developed and expanded our