Exempt Quantities

Federal regulatory authorities consider certain quantities 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 quantities 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", 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

Sb-122 - 100
Sb-124 - 10
Sb-125 - 10

Arsenic

As-73 - 100
As-74 - 10
As-76 - 10
As-77 - 100

Barium

Ba-131 - 10
Ba-133 - 10
Ba-140 - 10

Bismuth

Bi-210 - 1

Bromine

Br-82 - 10

Cadmium

Cd-109 - 10
Cd-115m - 10
Cd-115 - 100

Calcium

Ca- 45 - 10
Ca- 47 - 10

Carbon

C-14 - 100

Cerium

Ce-141 - 100
Ce-143 - 100
Ce-144 - 1

Cesium

Cs-131 - 1,000
Cs-134m - 100
Cs-134 - 1
Cs-135 - 10
Cs-136 - 10
Cs-137 - 10

Chlorine

C1-36 - 10
Cl-38 - 10

Chromium

Cr-51 - 1,000

Cobalt

Co-58m - 10
Co-58 - 10
Co-60 - 1

Copper

Cu-64 - 100

Dysprosium

Dy-165 - 10
Dy-166 - 100

Erbium

Er-169 - 100
Er-171 - 100

Europium

Eu-152 - 9.2 h - 100
Eu-152 - 13 yr - 1
Eu-154 - 1
Eu-155 - 10

Fluorine

F-18 - 1,000

Gadolinium

Gd-153 - 10
Gd-159 - 100

Gallium

Ga-72 - 10

Germanium

Ge-71 - 100

Gold

Au-198 - 100
Au-199 - 100

Hafnium

Hf-181 - 10

Holmium

Ho-166 - 100

Hydrogen

H-3 (tritium) - 1,000

Indium

In-113m - 100
In-114m - 10
In-115m - 100
In-115 - 10

Iodine

I-125 - 1
I-126 - 1
I-129 - 0.1
I-131 - 1
I-132 - 10
I-133 - 1
I-134 - 10
I-135 - 10

Iridium

Ir-192 - 10
Ir-194 - 100

Iron

Fe-55 - 100
Fe-59 - 10

Krypton

Kr-85 - 100
Kr-87 - 10

Lanthanum

Lu-140 - 10

Lutetium

La-177 - 100

Manganese

Mn-52 - 10
Mn-54 - 10
Mn-56 - 10

Mercury

Hg-197m - 100
Hg-197 - 100
Hg-203 - 10

Molybdenum

Mo-99 - 100

Neodynium

Nd-147 - 100
Nd-149 - 100

Nickel

Ni-59 - 100
Ni-63 - 10
Ni-65 - 100

Niobium

Nb-93m - 10
Nb-95 - 10
Nb-97 - 10

Osmium

Os-185 - 10
Os-191m - 100
Os-191 - 100
Os-193 - 100

Palladium

Pd-103 - 100
Pd-109 - 100

Phosphorus

P-32 - 10

Platinum

Pt-191 - 100
Pt-193m - 100
Pt-193 - 100
Pt-197m - 100
Pt-197 - 100

Polonium

Po-210 - 0.1

Potassium

K-42 - 10

Praseodymium

Pr-142 - 100
Pr-143 - 100

Promethium

Pm-147 - 10
Pm-149 - 10

Rhenium

Re-186 - 100
Re-188 - 100

Rhodium

Rh-103m - 100
Rh-105 - 100

Rubidium

Rb-86 - 10
Rb-87 - 10

Ruthenium

Ru-97 - 100
Ru-103 - 10
Ru-105 - 10
Ru-106 - 1

Samarium

Sm-151 - 10
Sm-153 - 100

Scandium

Sc-46 - 10
Sc-47 - 100
Sc-48 - 10

Selenium

Se-75 - 10

Silicon

Si-31 - 100

Silver

Ag-105 - 10
Ag-110m - 1
Ag 111 - 100

Sodium

Na-24 - 10

Strontium

Sr-85 - 10
Sr-89 - 1
Sr-90 - 0.1
Sr-91 - 10
Sr-92 - 10

Sulphur

S-35 - 100

Tantalum

Ta-182 - 10

Technetium

Tc-97m - 100
Tc-97 - 100
Tc-99m - 100
Tc-99 - 10

Tellurium

Te-125m - 10
Te-127m - 10
Te-127 - 100
Te-129m - 10
Te-129 - 100
Te-131m - 10
Te-132 - 10

Terbium

Tb-160 - 10

Thallium

T- 200 - 100
Tl-201 - 100
Tl-202 - 100
Tl-204 - 10

Thulium

Tm-170 - 10
Tm-171 - 10

Tin

Sn-113 - 10
Sn-125 - 10

Tungsten

W-181 - 10
W-185 - 10
W-187 - 100

Vanadium

V-48 - 10

Xenon

Xe-131m - 1,000
Xe-133 - 100
Xe-135 - 100

Ytterbium

Yb-175 - 100

Yttrium

Y 90 - 10
Y 91 - 10
Y 92 - 100
Y 93 - 100

Zinc

Zn-65 - 10
Zn-69m - 100
Zn-69 - 1,000

Zirconium

Zr-93 - 10
Zr-95 - 10
Zr-97 - 10

All others except alpha-emitting byproduct material - 0.1

Alpha-emitting byproduct material - 0

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