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Analytical Laboratories  (4)
NMR Solvents  (5)

Advanced Materials Technologies Ltd, - AMT, supplies stable isotopes, deuterated solvents and high purity materials for medical and chemical research.
Center of Molecular Research - Representative of a Russian producer of Oxygen-18 water situated in Saint Petersburg
Chemgas - Chemgas supplies high purity rare gases and isotopically enriched gases.
CNL Scientific Resources, Inc. - A supplier of isotopes, metals, crystals and other engineered materials to manufacturers of pharmaceuticals and instruments.
Hartmann Analytic GmbH - Supplier of radio-labeled chemicals, products for radiation protection. Also offers labeling-services and custom synthesis.
Hyox18 - Isotope O18 enriched water used to produce fluoro-deoxyglucose for PET.
Icon Services - Supplier of compounds labeled with stable isotopes.
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.
International Isotopes Clearing House, Inc. - Catalog listing of radioisotopes, 14C- and 3H-labeled compounds for medical research, 33P- and 125I- available.
Isoflex - Stable isotopes for use in science, medicine and industry from Russian producers.
IsoSciences - Custom stable isotope labeling and small scale organic synthesis including the preparation of metabolites and PET precursors and standards.
Isotec - A member of the Sigma-Aldrich family, manufacturer of stable isotope labeled compounds.
Martek Biosciences - can supply isotopically enriched biochemicals
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.
Moravek Radiochemicals - Manufacturer of tritium and carbon 14 labeled radiochemicals for AIDS and cancer research.
Omicron Biochemicals Inc. - Supplier of single, multiple and uniform stable isotope labeled saccharides and nucleosides (13C, 2H, 15N, 18O).
PerkinElmer Life and Analytical Sciences - Radiochemicals including radiolabeled ligands, P32, amino acids, macromolecules, microspheres, precursors, and radionuclides
PicoTrace - Equipment for trace element and isotope analysis.
Proftec - Supplier of pure Copper powder.
Radioisotopes in Medicine - Stable and unstable isotopes are covered.
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.
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.
STB Isotopes - Stable isotopes for science, medicine and industry, a list of some rare and unusual stable isotopes.
Techsnabexport - Supplier of Russian-produced radioisotopes and labeled compounds.
U.S. DOE Isotope Production and Distribution - U.S. Department of Energy isotopes catalog. Quite an extensive list.
U.S. DOE Isotope Programs - Information about U.S. Department of Energy production of isotopes programs.
ViTrax Radiochemicals - Manufactures Tritium, Carbon-14, and Sulfur-35 radiolabeled products and offers custom radiosynthesis under cGMP.
Wellington Laboratories - Produces 12C and 13C halogenated reference standards of environmental concern, including chlorinated and brominated dioxins, furans, biphenyls and diphenyl ethers. Includes corporate and product details, online catalog and contacts.