Exempt Concentrations

Federal regulatory authorities consider certain concentrations of radioactive materials to be exempt from regulatory authority. In other words, one may possess up to the specified amount of a particular radionuclide without having to secure a radioactive materials license . However, this exemption does not apply to concentrations that may be commercially distributed. (Press the "Position Papers" category on the left to review several USNRC position papers on this topic.)

The following is  the listing of exempt quantities, in units of "microcuries per milliliter" for liquids or gases, or "microcuries per gram" for solids, promulgated by the U. S. Nuclear Regulatory Commission in Title 10, Code of Federal Regulations, Part 30.  Agreement States may have additional requirements for the use of these materials or interpret these regulations in a different manner.  Please contact IEM for guidance on state-specific requirements.                        

Antimony

Argon

Arsenic

Barium

Beryllium

Bismuth

Bromine

Cadmium

Calcium

Carbon

Cerium

Cesium

Chlorine

Chromium

Cobalt

Copper

Dysprosium

Erbium

Europium

Fluorine

Gadolinium

Gallium

Germanium

Gold

Hafnium

Hydrogen

Indium

Iodine

Iridium

Iron

Krypton

Lanthanum

Lead

Lutetium

Manganese

Mercury

Molybdenum

Neodymium

Nickel

Niobium

Osmium

Palladium

Phosphorus

Platinum

Potassium

Praseodymium

Promethium

Rhenium

Rhodium

Rubidium

Ruthenium

Samarium

Scandium

Selenium

Silicon

Silver

Sodium

Strontium

Sulfur

Tantalum

Technetium

Tellurium

Terbium

Thallium

Thulium

Tin

Tungsten

Vanadium

Xenon

Ytterbium

Yttrium

Zinc

Zirconium

Beta and/or gamma emitting byproduct material not listed above with half-life less than 3 years - 1E-10 (gas)

Beta and/or gamma emitting byproduct material not listed above with half-life less than 3 years - 1E-6

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