Martek Biosciences can supply isotopically enriched biochemicals http://www.martekbio.com/

MDS Nordion Radioisotope technology used to prevent, diagnose and treat disease. Products and services include nuclear medicine, radiation therapy for cancer, irradiation sterilization and food irradiation. http://www.mds.nordion.com/

Radioisotopes in Medicine Stable and unstable isotopes are covered. http://www.uic.com.au:80/nip26.htm

Moravek Radiochemicals Manufacturer of tritium and carbon 14 labeled radiochemicals for AIDS and cancer research. http://www.moravek.com/

International Isotope Society The IIS provides a forum for all chemists involved in radiochemical synthesis and analysis to obtain and share information outside of their immediate area of employment and expertise. http://www.intl-isotope-soc.org/

PicoTrace Equipment for trace element and isotope analysis. http://www.picotrace.de/

Spectra Gases Specialty gases for high technology markets. Our core business is pure gases and gas mixtures for excimer lasers and lamps. Isotopic en-richment of gases for research. http://www.spectra-gases.com/

RITVERC GmbH A producer and worldwide supplier of radioisotope products for science, industry, and medicine. Product list includes radiation sources, labelled compounds, stable isotopes, and radiopreparations. http://www.ritverc.com/

Advanced Materials Technologies Ltd, AMT, supplies stable isotopes, deuterated solvents and high purity materials for medical and chemical research. http://www.isotope-amt.com

Chemgas Chemgas supplies high purity rare gases and isotopically enriched gases. http://www.chemgas.com/

International Isotopes Clearing House, Inc. Catalog listing of radioisotopes, 14C- and 3H-labeled compounds for medical research, 33P- and 125I- available. http://www.iichinc.com/

STB Isotopes Stable isotopes for science, medicine and industry, a list of some rare and unusual stable isotopes. http://www.stb-isotope.com/

Gamma Radiation Sources CNEA (Argentina's nuclear energy agency) produces qualified cobalt-60 sources for irradiation plants and for medical use. http://www.cnea.gov.ar/tecno/co60-eng/

Cambridge Isotope Laboratories (CIL) A producer of stable isotope labeled compounds and stable isotope separations. http://www.isotope.com/cil/index.html

Gas Oils JSC Manufactures carbon 13 labeled carbon dioxide using lasers. http://www.c13.ru

ViTrax Radiochemicals Manufactures Tritium, Carbon-14, and Sulfur-35 radiolabeled products and offers custom radiosynthesis under cGMP. http://www.vitrax.com/

Hyox18 Isotope O18 enriched water used to produce fluoro-deoxyglucose for PET. http://www.hyox18.com/

Omicron Biochemicals Inc. Supplier of single, multiple and uniform stable isotope labeled saccharides and nucleosides (13C, 2H, 15N, 18O). http://www.omicronbio.com/

Techsnabexport Supplier of Russian-produced radioisotopes and labeled compounds. http://www.tenex.ru/

IsoSciences Custom stable isotope labeling and small scale organic synthesis including the preparation of metabolites and PET precursors and standards. http://www.isosciences.com/pages/1/index.htm