About Isotopes

Isotopes are variants of chemical elements: while all isotopes of a given element contain the same number of protons, they vary in the number of neutrons they contain. Variation in neutron number produces chemically identical atoms with different masses, which can be exploited to allow tracing of specific individual atoms through a system.

Stable isotopes

Stable isotopes are generally defined as non-radioactive isotopic elements that do not decay over time. Radioactive isotopes may also be classified as stable isotopes when their half-lives are too long to be measured. These elements can often be found to occur in nature and include isotopes of carbon, nitrogen, hydrogen, oxygen, noble gases and metals. For example, three naturally occurring isotopes of hydrogen include protium (H) having one neutron, deuterium (2H) having two neutrons, and tritium having three neutrons.

Isotopically labeled compounds

Isotopically labelled compounds are compounds that incorporate isotopic elements within their molecular structure and are thus "labelled" by the isotope. These compounds are used to study chemical and biochemical reactions, metabolic pathways or cellular transport. Specifically, isotope-labelled compounds are routinely used for a variety of applications including magnetic resonance imaging (MRI), spectroscopy, nuclear magnetic resonance (NMR), and geochemical analyses. An example of using an isotopic label includes replacing the most common isotope of hydrogen, protium, with deuterium to observe hydrogen exchange reactions in water.

Isotope separation methods

Distillation and Diffusion Processes

Distillation or diffusion are processes which are for enrichment used when there are relatively large mass differences between different isotopes of an element.

Centrifuge enrichment

Centrifuge processes for enrichment includes gas centrifugation and improvements upon the gas centrifuge techniques. This process involves rotating cylinders in order to move the heavier gas molecules containing a given isotope to the outer radius of the cylinder while collecting the lighter gas molecules containing the given isotope in the center of the cylinder.

Electromagnetic enrichment

Electromagnetic isotope separation processes involves first vaporizing the isotope containing molecules followed by ionizing the vapor with positively charged ions. A mass spectrometer, known as the Calutron, is then used to redirect a stream of cations onto a target for collection.

Other methods: laser enrichment, photochemical enrichment and plasma separation

Laser enrichment processes provide for lower energy inputs and thus more economical enrichment. One method currently under investigation is known as the Separation of Isotopes by Laser Excitiation (SILEX). Another laser method that is used to enrich uranium containing the 235U atom is known as molecular laser isotope separation (MLIS) which involves using infrared laser at UF6 molecules and a second laser to free a fluorine atom resulting in precipitation of the remaining UF5 compound out of the gas.

Plasma separation involves the principle of ion cyclotron resonance and uses superconducting magnets to energize a given isotope in plasma consisting of an ionic mixture.



Metabolic studies

Biochemical markers and probes are used to research the uptake of compounds by the body. For example, nutritional studies are commonly performed using isotopic labeled compounds.

Brain and kidney function

Studies of brain and kidney function are performed by tracing isotopes throughout these organs for both diagnostics and treatment applications.


Precursors for therapeutic radioisotopes or radiation therapy are used for a variety of therapies. For example, neuroendocrine tumors are treated by radiotherapy using hormone bound lutetium-177 and yttrium-90.

Clinical pharmacology

Tracing drug metabolism requires the use of isotopes bound to drug in order to understand the processing of the given pharmaceutical by the body.



A wide range of biochemical processes can be studied using stable isotopes. For example, a technique known as stable isotope labeling by amino acids in cell culture (SILAC) is used in proteomics research to help identify disease biomarkers.


The use of isotope labeling allows chemists to study the mechanisms of chemical reactions, as individual atoms can be followed through a system.

Environmental science

Isotopes are valuable for studying release and spread of pollutants in the environment.


The tracing of isotope movement, either within a local system such as an estuary or on a global scale, can allow study of circulation patterns.


Various compounds labeled with nitrogen-15 are used in the study of processes such as plant metabolism and fertilizer uptake.

Isotopes Products

Aluminum Oxide-18O3 Antimony 121 Metal Isotope Antimony 123 Metal Isotope
Barium Carbonate-13C Barium-135 Carbonate Isotope Barium-136 Carbonate Isotope
Barium-137 Carbonate Isotope Barium-138 Carbonate Isotope Boric 11 Acid Isotope
Boric Acid 10-B Boron-10 Carbide Isotope Boron-10 Isotope
Boron-10 Oxide Isotope Boron-10 Trifluoride Isotope Boron-10B Trifluoride Diethyl Etherate
Boron-11 Carbide Isotope Boron-11 Isotope Boron-11 Oxide Isotope
Boron-11 Trifluoride Isotope Cadmium-106 Metal Isotope Cadmium-106 Oxide Isotope
Cadmium-108 Metal Isotope Cadmium-108 Oxide Isotope Cadmium-110 Oxide Isotope
Cadmium-111 Chloride Isotope Cadmium-111 Oxide Isotope Cadmium-112 Metal Isotope
Cadmium-112 Oxide Isotope Cadmium-113 Chloride Isotope Cadmium-113 Metal Isotope
Cadmium-113 Oxide Isotope Cadmium-114 Oxide Isotope Cadmium-116 Oxide Isotope
Calcium-40 Carbonate Isotope Calcium-42 Carbonate Isotope Calcium-43 Carbonate Isotope
Calcium-44 Carbonate Isotope Calcium-46 Carbonate Isotope Chromium-50 Oxide Isotope
Chromium-52 Oxide Isotope Chromium-53 Metal Isotope Chromium-53 Oxide Isotope
Chromium-54 Oxide Isotope Copper-63 Metal Isotope Copper-63 Oxide Isotope
Copper-65 Metal Isotope Copper-65 Oxide Isotope Dysprosium-161 Oxide Isotope
Dysprosium-162 Oxide Isotope Dysprosium-164 Oxide Isotope Erbium-162 Oxide Isotope
Erbium-166 Oxide Isotope Erbium-168 Oxide Isotope Erbium-170 Oxide Isotope
Europium-151 Oxide Gadolinium-155 Oxide Isotope Gadolinium-156 Oxide Isotope
Gadolinium-158 Oxide Isotope Gadolinium-160 Oxide Isotope Gallium-69 Metal Isotope
Gallium-71 Sesquioxide Isotope Hafnium-180 Oxide Isotope Indium-113 Metal Isotope
Indium-113 Oxide Isotope Iridium-191 Metal Isotope Iridium-193 Metal Isotope
Iron-54 Metal Isotope Iron-54 Oxide Isotope Iron-56 Metal Isotope
Iron-57 Metal Isotope Iron-57 Oxide Isotope Iron-58 Metal Isotope
Iron-58 Oxide Isotope Lead 204 Carbonate Isotope Lead 204 Metal Isotope
Lead 206 Carbonate Isotope Lead 206 Metal Isotope Lead 206 Oxide Isotope
Lead 207 Carbonate Isotope Lead 207 Metal Isotope Lead 207 Nitrate Isotope
Lead 207 Oxide Isotope Lead 207 Sulfate Isotope Lead 208 Carbonate Isotope
Lead 208 Metal Isotope Lithium-6 Carbonate Isotope Lithium-6 Chloride
Lithium-6 Deuteroxide Deuterate Lithium-6 Fluoride Lithium-6 Hydroxide Monohydrate
Lithium-6 Metal Isotope Lithium-6 Oxide Lithium-6 Sulfate
Lithium-7 Carbonate Lithium-7 Fluoride Lithium-7 Hydroxide Monohydrate
Lithium-7 Metal Isotope Lithium-7 Oxide Lutetium-176 Oxide Isotope
Magnesium-24 Metal Isotope Magnesium-24 Oxide Isotope Magnesium-25 Metal Isotope
Magnesium-25 Oxide Isotope Magnesium-26 Metal Isotope Magnesium-26 Oxide Isotope
Mercury-202 Metal Isotope Molybdenum-100 Metal Isotope Molybdenum-94 Trioxide Isotope
Molybdenum-95 Metal Isotope Molybdenum-95 Trioxide Isotope Molybdenum-96 Trioxide Isotope
Molybdenum-97 Metal Isotope Molybdenum-97 Trioxide Isotope Molybdenum-98 Trioxide Isotope
Neodymium 145 Oxide Isotope Neodymium 150 Oxide Isotope Nickel 58 Metal Isotope
Nickel 60 Metal Isotope Nickel 61 Metal Isotope Nickel 62 Metal Isotope
Nickel 64 Metal Isotope Osmium 187 Metal Isotope Osmium 188 Metal Isotope
Palladium 102 Metal Isotope Palladium 104 Metal Isotope Palladium 105 Metal Isotope
Palladium 108 Metal Isotope Platinum 194 Metal Isotope Platinum 196 Metal Isotope
Platinum 198 Metal Isotope Potassium 40 Chloride Isotope Potassium 41 Chloride Isotope
Potassium Cyanoborodeuteride Potassium Dideuterium Phosphate Rhenium 185 Metal Isotope
Rubidium 87 Chloride Isotope Ruthenium 100 Metal Isotope Ruthenium 101 Metal Isotope
Ruthenium 104 Metal Isotope Ruthenium 99 Metal Isotope Samarium 144 Oxide Isotope
Samarium 152 Oxide Isotope Samarium 154 Oxide Isotope Selenium 74 Isotope
Selenium 76 Isotope Selenium 77 Isotope Selenium 78 Isotope
Selenium 82 Isotope Silicon 28 Dioxide Isotope Silicon 29 Dioxide Isotope
Silicon 29 Isotope Silicon 30 Dioxide Isotope Silver 107 Metal Isotope
Silver 109 Metal Isotope Silver Cyanide- 13C,15N Sodium Chloride 35 Isotope
Sodium Cyanoborodeuteride Sodium Deuteroxide Solution Sodium Dideuterium Phosphate
Sodium-79 Bromide Isotope Sodium-81 Bromide Isotope Strontium 86 Carbonate Isotope
Strontium 87 Carbonate Isotope Strontium 88 Carbonate Isotope Sulfur-33 Isotope
Sulfur-34 Isotope Tellurium 122 Isotope Tellurium 123 Isotope
Tellurium 124 Isotope Tellurium 125 Isotope Tellurium 126 Isotope
Thallic 203 Oxide Isotope Tin 112 Metal Isotope Tin 116 Metal Isotope
Tin 117 Metal Isotope Tin 118 Metal Isotope Tin 119 Metal Isotope
Tin 119 Oxide Isotope Titanium 49 Oxide Isotope Tungsten 182 Metal Isotope
Tungsten 182 Trioxide Isotope Tungsten 183 Metal Isotope Tungsten 184 Trioxide Isotope
Tungsten 186 Trioxide Isotope Ytterbium 171 Oxide Isotope Ytterbium 172 Oxide Isotope
Ytterbium 174 Oxide Isotope Ytterbium 176 Oxide Isotope Zinc 64 Oxide Isotope
Zinc 66 Metal Isotope Zinc 66 Oxide Isotope Zinc 67 Metal Isotope
Zinc 67 Oxide Isotope Zinc 68 Metal Isotope Zinc 68 Oxide Isotope
Zinc 70 Metal Isotope Zinc 70 Oxide Isotope Zirconium 90 Metal Isotope
Zirconium 91 Oxide Isotope

Isotopic metals and compounds are available in a variety of forms and enrichment levels. Compounds include stable isotopes containing carbon, nitrogen, deuterium, noble gases, and metals such as oxides, sulfates, carbonates and more. Additionally, we can produce custom syntheses according to customer needs and specifications for research and development.