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Appendix C to Part 20—Quantities1 of Licensed Material Requiring Labeling

Radionuclide Abbreviation Quantity (µCi)
Hydrogen-3 H-3 1,000
Beryllium-7 Be-7 1,000
Beryllium-10 Be-10 1
Carbon-11 C-11 1,000
Carbon-14 C-14 100
Fluorine-18 F-18 1,000
Sodium-22 Na-22 10
Sodium-24 Na-24 100
Magnesium-28 Mg-28 100
Aluminum-26 Al-26 10
Silicon-31 Si-31 1,000
Silicon-32 Si-32 1
Phosphorus-32 P-32 10
Phosphorus-33 P-33 100
Sulfur-35 S-35 100
Chlorine-36 Cl-36 10
Chlorine-38 Cl-38 1,000
Chlorine-39 Cl-39 1,000
Argon-39 Ar-39 1,000
Argon-41 Ar-41 1,000
Potassium-40 K-40 100
Potassium-42 K-42 1,000
Potassium-43 K-43 1,000
Potassium-44 K-44 1,000
Potassium-45 K-45 1,000
Calcium-41 Ca-41 100
Calcium-45 Ca-45 100
Calcium-47 Ca-47 100
Scandium-43 Sc-43 1,000
Scandium-44m Sc-44m 100
Scandium-44 Sc-44 100
Scandium-46 Sc-46 10
Scandium-47 Sc-47 100
Scandium-48 Sc-48 100
Scandium-49 Sc-49 1,000
Titanium-44 Ti-44 1
Titanium-45 Ti-45 1,000
Vanadium-47 V-47 1,000
Vanadium-48 V-48 100
Vanadium-49 V-49 1,000
Chromium-48 Cr-48 1,000
Chromium-49 Cr-49 1,000
Chromium-51 Cr-51 1,000
Manganese-51 Mn-51 1,000
Manganese-52m Mn-52m 1,000
Manganese-52 Mn-52 100
Manganese-53 Mn-53 1,000
Manganese-54 Mn-54 100
Manganese-56 Mn-56 1,000
Iron-52 Fe-52 100
Iron-55 Fe-55 100
Iron-59 Fe-59 10
Iron-60 Fe-60 1
Cobalt-55 Co-55 100
Cobalt-56 Co-56 10
Cobalt-57 Co-57 100
Cobalt-58m Co-58m 1,000
Cobalt-58 Co-58 100
Cobalt-60m Co-60m 1,000
Cobalt-60 Co-60 1
Cobalt-61 Co-61 1,000
Cobalt-62m Co-62m 1,000
Nickel-56 Ni-56 100
Nickel-57 Ni-57 100
Nickel-59 Ni-59 100
Nickel-63 Ni-63 100
Nickel-65 Ni-65 1,000
Nickel-66 Ni-66 10
Copper-60 Cu-60 1,000
Copper-61 Cu-61 1,000
Copper-64 Cu-64 1,000
Copper-67 Cu-67 1,000
Zinc-62 Zn-62 100
Zinc-63 Zn-63 1,000
Zinc-65 Zn-65 10
Zinc-69m Zn-69m 100
Zinc-69 Zn-69 1,000
Zinc-71m Zn-71m 1,000
Zinc-72 Zn-72 100
Gallium-65 Ga-65 1,000
Gallium-66 Ga-66 100
Gallium-67 Ga-67 1,000
Gallium-68 Ga-68 1,000
Gallium-70 Ga-70 1,000
Gallium-72 Ga-72 100
Gallium-73 Ga-73 1,000
Germanium-66 Ge-66 1,000
Germanium-67 Ge-67 1,000
Germanium-68 Ge-68 10
Germanium-69 Ge-69 1,000
Germanium-71 Ge-71 1,000
Germanium-75 Ge-75 1,000
Germanium-77 Ge-77 1,000
Germanium-78 Ge-78 1,000
Arsenic-69 As-69 1,000
Arsenic-70 As-70 1,000
Arsenic-71 As-71 100
Arsenic-72 As-72 100
Arsenic-73 As-73 100
Arsenic-74 As-74 100
Arsenic-76 As-76 100
Arsenic-77 As-77 100
Arsenic-78 As-78 1,000
Selenium-70 Se-70 1,000
Selenium-73m Se-73m 1,000
Selenium-73 Se-73 100
Selenium-75 Se-75 100
Selenium-79 Se-79 100
Selenium-81m Se-81m 1,000
Selenium-81 Se-81 1,000
Selenium-83 Se-83 1,000
Bromine-74m Br-74m 1,000
Bromine-74 Br-74 1,000
Bromine-75 Br-75 1,000
Bromine-76 Br-76 100
Bromine-77 Br-77 1,000
Bromine-80m Br-80m 1,000
Bromine-80 Br-80 1,000
Bromine-82 Br-82 100
Bromine-83 Br-83 1,000
Bromine-84 Br-84 1,000
Krypton-74 Kr-74 1,000
Krypton-76 Kr-76 1,000
Krypton-77 Kr-77 1,000
Krypton-79 Kr-79 1,000
Krypton-81 Kr-81 1,000
Krypton-83m Kr-83m 1,000
Krypton-85m Kr-85m 1,000
Krypton-85 Kr-85 1,000
Krypton-87 Kr-87 1,000
Krypton-88 Kr-88 1,000
Rubidium-79 Rb-79 1,000
Rubidium-81m Rb-81m 1,000
Rubidium-81 Rb-81 1,000
Rubidium-82m Rb-82m 1,000
Rubidium-83 Rb-83 100
Rubidium-84 Rb-84 100
Rubidium-86 Rb-86 100
Rubidium-87 Rb-87 100
Rubidium-88 Rb-88 1,000
Rubidium-89 Rb-89 1,000
Strontium-80 Sr-80 100
Strontium-81 Sr-81 1,000
Strontium-83 Sr-83 100
Strontium-85m Sr-85m 1,000
Strontium-85 Sr-85 100
Strontium-87m Sr-87m 1,000
Strontium-89 Sr-89 10
Strontium-90 Sr-90 0.1
Strontium-91 Sr-91 100
Strontium-92 Sr-92 100
Yttrium-86m Y-86m 1,000
Yttrium-86 Y-86 100
Yttrium-87 Y-87 100
Yttrium-88 Y-88 10
Yttrium-90m Y-90m 1,000
Yttrium-90 Y-90 10
Yttrium-91m Y-91m 1,000
Yttrium-91 Y-91 10
Yttrium-92 Y-92 100
Yttrium-93 Y-93 100
Yttrium-94 Y-94 1,000
Yttrium-95 Y-95 1,000
Zirconium-86 Zr-86 100
Zirconium-88 Zr-88 10
Zirconium-89 Zr-89 100
Zirconium-93 Zr-93 1
Zirconium-95 Zr-95 10
Zirconium-97 Zr-97 100
Niobium-88 Nb-88 1,000
Niobium-89m (66 min) Nb-89m 1,000
Niobium-89 (122 min) Nb-89 1,000
Niobium-89 Nb-89 1,000
Niobium-90 Nb-90 100
Niobium-93m Nb-93m 10
Niobium-94 Nb-94 1
Niobium-95m Nb-95m 100
Niobium-95 Nb-95 100
Niobium-96 Nb-96 100
Niobium-97 Nb-97 1,000
Niobium-98 Nb-98 1,000
Molybdenum-90 Mo-90 100
Molybdenum-93m Mo-93m 100
Molybdenum-93 Mo-93 10
Molybdenum-99 Mo-99 100
Molybdenum-101 Mo-101 1,000
Technetium-93m Tc-93m 1,000
Technetium-93 Tc-93 1,000
Technetium-94m Tc-94m 1,000
Technetium-94 Tc-94 1,000
Technetium-96m Tc-96 1,000
Technetium-96 Tc-96 100
Technetium-97m Tc-97m 100
Technetium-97 Tc-97 1,000
Technetium-98 Tc-98 10
Technetium-99m Tc-99m 1,000
Technetium-99 Tc-99 100
Technetium-101 Tc-101 1,000
Technetium-104 Tc-104 1,000
Ruthenium-94 Ru-94 1,000
Ruthenium-97 Ru-97 1,000
Ruthenium-103 Ru-103 100
Ruthenium-105 Ru-105 1,000
Ruthenium-106 Ru-106 1
Rhodium-99m Rh-99m 1,000
Rhodium-99 Rh-99 100
Rhodium-100 Rh-100 100
Rhodium-101m Rh-101m 1,000
Rhodium-101 Rh-101 10
Rhodium-102m Rh-102m 10
Rhodium-102 Rh-102 10
Rhodium-103m Rh-103m 1,000
Rhodium-105 Rh-105 100
Rhodium-106m Rh-106m 1,000
Rhodium-107 Rh-107 1,000
Palladium-100 Pd-100 100
Palladium-101 Pd-101 1,000
Palladium-103 Pd-103 100
Palladium-107 Pd-107 10
Palladium-109 Pd-109 100
Silver-102 Ag-102 1,000
Silver-103 Ag-103 1,000
Silver-104m Ag-104m 1,000
Silver-104 Ag-104 1,000
Silver-105 Ag-105 100
Silver-106m Ag-106m 100
Silver-106 Ag-106 1,000
Silver-108m Ag-108m 1
Silver-110m Ag-110m 10
Silver-111 Ag-111 100
Silver-112 Ag-112 100
Silver-115 Ag-115 1,000
Cadmium-104 Cd-104 1,000
Cadmium-107 Cd-107 1,000
Cadmium-109 Cd-109 1
Cadmium-113m Cd-113m 0.1
Cadmium-113 Cd-113 100
Cadmium-115m Cd-115m 10
Cadmium-115 Cd-115 100
Cadmium-117m Cd-117m 1,000
Cadmium-117 Cd-117 1,000
Indium-109 In-109 1,000
Indium-110 (69.1 min.) In-110 1,000
Indium-110 (4.9h) In-110 1,000
Indium-111 In-111 100
Indium-112 In-112 1,000
Indium-113m In-113m 1,000
Indium-114m In-114m 10
Indium-115m In-115m 1,000
Indium-115 In-115 100
Indium-116m In-116m 1,000
Indium-117m In-117m 1,000
Indium-117 In-117 1,000
Indium-119m In-119m 1,000
Tin-110 Sn-110 100
Tin-111 Sn-111 1,000
Tin-113 Sn-113 100
Tin-117m Sn-117m 100
Tin-119m Sn-119m 100
Tin-121m Sn-121m 100
Tin-121 Sn-121 1,000
Tin-123m Sn-123m 1,000
Tin-123 Sn-123 10
Tin-125 Sn-125 10
Tin-126 Sn-126 10
Tin-127 Sn-127 1,000
Tin-128 Sn-128 1,000
Antimony-115 Sb-115 1,000
Antimony-116m Sb-116m 1,000
Antimony-116 Sb-116 1,000
Antimony-117 Sb-117 1,000
Antimony-118m Sb-118m 1,000
Antimony-119 Sb-119 1,000
Antimony-120 (16 min.) Sb-120 1,000
Antimony-120 (5.76d) Sb-120 100
Antimony-122 Sb-122 100
Antimony-124m Sb-124m 1,000
Antimony-124 Sb-124 10
Antimony-125 Sb-125 100
Antimony-126m Sb-126m 1,000
Antimony-126 Sb-126 100
Antimony-127 Sb-127 100
Antimony-128 (10.4 min.) Sb-128 1,000
Antimony-128 (9.01h) Sb-128 100
Antimony-129 Sb-129 100
Antimony-130 Sb-130 1,000
Antimony-131 Sb-131 1,000
Tellurium-116 Te-116 1,000
Tellurium-121m Te-121m 10
Tellurium-121 Te-121 100
Tellurium-123m Te-123m 10
Tellurium-123 Te-123 100
Tellurium-125m Te-125m 10
Tellurium-127m Te-127m 10
Tellurium-127 Te-127 1,000
Tellurium-129m Te-129m 10
Tellurium-129 Te-129 1,000
Tellurium-131m Te-131m 10
Tellurium-131 Te-131 100
Tellurium-132 Te-132 10
Tellurium-133m Te-133m 100
Tellurium-133 Te-133 1,000
Tellurium-134 Te-134 1,000
Iodine-120m I-120m 1,000
Iodine-120 I-120 100
Iodine-121 I-121 1,000
Iodine-123 I-123 100
Iodine-124 I-124 10
Iodine-125 I-125 1
Iodine-126 I-126 1
Iodine-128 I-128 1,000
Iodine-129 I-129 1
Iodine-130 I-130 10
Iodine-131 I-131 1
Iodine-132m I-132m 100
Iodine-132 I-132 100
Iodine-133 I-133 10
Iodine-134 I-134 1,000
Iodine-135 I-135 100
Xenon-120 Xe-120 1,000
Xenon-121 Xe-121 1,000
Xenon-122 Xe-122 1,000
Xenon-123 Xe-123 1,000
Xenon-125 Xe-125 1,000
Xenon-127 Xe-127 1,000
Xenon-129m Xe-129m 1,000
Xenon-131m Xe-131m 1,000
Xenon-133m Xe-133m 1,000
Xenon-133 Xe-133 1,000
Xenon-135m Xe-135m 1,000
Xenon-135 Xe-135 1,000
Xenon-138 Xe-138 1,000
Cesium-125 Cs-125 1,000
Cesium-127 Cs-127 1,000
Cesium-129 Cs-129 1,000
Cesium-130 Cs-130 1,000
Cesium-131 Cs-131 1,000
Cesium-132 Cs-132 100
Cesium-134m Cs-134m 1,000
Cesium-134 Cs-134 10
Cesium-135m Cs-135m 1,000
Cesium-135 Cs-135 100
Cesium-136 Cs-136 10
Cesium-137 Cs-137 10
Cesium-138 Cs-138 1,000
Barium-126 Ba-126 1,000
Barium-128 B-128 100
Barium-131m Ba-131m 1,000
Barium-131 Ba-131 100
Barium-133m Ba-133m 100
Barium-133 Ba-133 100
Barium-135m Ba-135m 100
Barium-139 Ba-139 1,000
Barium-140 Ba-140 100
Barium-141 Ba-141 1,000
Barium-142 Ba-142 1,000
Lanthanum-131 La-131 1,000
Lanthanum-132 La-132 100
Lanthanum-135 La-135 1,000
Lanthanum-137 La-137 10
Lanthanum-138 La-138 100
Lanthanum-140 La-140 100
Lanthanum-141 La-141 100
Lanthanum-142 La-142 1,000
Lanthanum-143 La-143 1,000
Cerium-134 Ce-134 100
Cerium-135 Ce-135 100
Cerium-137m Ce-137m 100
Cerium-137 Ce-137 1,000
Cerium-139 Ce-139 100
Cerium-141 Ce-141 100
Cerium-143 Ce-143 100
Cerium-144 Ce-144 1
Praseodymium-136 Pr-136 1,000
Praseodymium-137 Pr-137 1,000
Praseodymium-138m Pe-138m 1,000
Praseodymium-139 Pe-139 1,000
Praseodymium-142m Pe-142m 1,000
Praseodymium-142 Pe-142 100
Praseodymium-143 Pe-143 100
Praseodymium-144 Pe-144 1,000
Praseodymium-145 Pe-145 100
Praseodymium-147 Pe-147 1,000
Neodymium-136 Nd-136 1,000
Neodymium-138 Nd-138 100
Neodymium-139m Nd-139m 1,000
Neodymium-139 Nd-139 1,000
Neodymium-141 Nd-141 1,000
Neodymium-147 Nd-147 100
Neodymium-149 Nd-149 1,000
Neodymium-151 Nd-151 1,000
Promethium-141 Pm-141 1,000
Promethium-143 Pm-143 100
Promethium-144 Pm-144 10
Promethium-145 Pm-145 10
Promethium-146 Pm-146 1
Promethium-147 Pm-147 10
Promethium-148m Pm-148m 10
Promethium-148 Pm-148 10
Promethium-149 Pm-149 100
Promethium-150 Pm-150 1,000
Promethium-151 Pm-151 100
Samarium-141m Sm-141m 1,000
Samarium-141 Sm-141 1,000
Samarium-142 Sm-142 1,000
Samarium-145 Sm-145 100
Samarium-146 Sm-146 1
Samarium-147 Sm-147 100
Samarium-151 Sm-151 10
Samarium-153 Sm-153 100
Samarium-155 Sm-155 1,000
Samarium-156 Sm-156 1,000
Europium-145 Eu-145 100
Europium-146 Eu-146 100
Europium-147 Eu-147 100
Europium-148 Eu-148 10
Europium-149 Eu-149 100
Europium-150 (12.62h) Eu-150 100
Europium-150 (34.2y) Eu-150 1
Europium-152m Eu-152m 100
Europium-152 Eu-152 1
Europium-154 Eu-154 1
Europium-155 Eu-155 10
Europium-156 Eu-156 100
Europium-157 Eu-157 100
Europium-158 Eu-158 1,000
Gadolinium-145 Gd-145 1,000
Gadolinium-146 Gd-146 10
Gadolinium-147 Gd-147 100
Gadolinium-148 Gd-148 0.001
Gadolinium-149 Gd-149 100
Gadolinium-151 Gd-151 10
Gadolinium-152 Gd-152 100
Gadolinium-153 Gd-153 10
Gadolinium-159 Gd-159 100
Terbium-147 Tb-147 1,000
Terbium-149 Tb-149 100
Terbium-150 Tb-150 1,000
Terbium-151 Tb-151 100
Terbium-153 Tb-153 1,000
Terbium-154 Tb-154 100
Terbium-155 Tb-155 1,000
Terbium-156m (5.0h) Tb-156m 1,000
Terbium-156m (24.4h) Tb-156m 1,000
Terbium-156 Tb-156 100
Terbium-157 Tb-157 10
Terbium-158 Tb-158 1
Terbium-160 Tb-160 10
Terbium-161 Tb-161 100
Dysprosium-155 Dy-155 1,000
Dysprosium-157 Dy-157 1,000
Dysprosium-159 Dy-159 100
Dysprosium-165 Dy-165 1,000
Dysprosium-166 Dy-166 100
Holmium-155 Ho-155 1,000
Holmium-157 Ho-157 1,000
Holmium-159 Ho-159 1,000
Holmium-161 Ho-161 1,000
Holmium-162m Ho-162m 1,000
Holmium-162 Ho-162 1,000
Holmium-164m Hp-164m 1,000
Holmium-164 Ho-164 1,000
Holmium-166m Ho-166m 1
Holmium-166 Ho-166 100
Holmium-167 Ho-167 1,000
Erbium-161 Er-161 1,000
Erbium-165 Er-165 1,000
Erbium-169 Er-169 100
Erbium-171 Er-171 100
Erbium-172 Er-172 100
Thulium-162 Tm-162 1,000
Thulium-166 Tm-166 100
Thulium-167 Tm-167 100
Thulium-170 Tm-170 10
Thulium-171 Tm-171 10
Thulium-172 Tm-172 100
Thulium-173 Tm-173 100
Thulium-175 Tm-175 1,000
Ytterbium-162 Yb-162 1,000
Ytterbium-166 Yb-166 100
Ytterbium-167 Yb-167 1,000
Ytterbium-169 Yb-169 100
Ytterbium-175 Yb-175 100
Ytterbium-177 Yb-177 1,000
Ytterbium-178 Yb-178 1,000
Lutetium-169 Lu-169 100
Lutetium-170 Lu-170 100
Lutetium-171 Lu-171 100
Lutetium-172 Lu-172 100
Lutetium-173 Lu-173 10
Lutetium-174m Lu-174m 10
Lutetium-174 Lu-174 10
Lutetium-176m Lu-176m 1,000
Lutetium-176 Lu-176 100
Lutetium-177m Lu-177m 10
Lutetium-177 Lu-177 100
Lutetium-178m Lu-178m 1,000
Lutetium-178 Lu-178 1,000
Lutetium-179 Lu-179 1,000
Hafnium-170 Hf-170 100
Hafnium-172 Hf-172 1
Hafnium-173 Hf-173 1,000
Hafnium-175 Hf-175 100
Hafnium-177m Hf-177m 1,000
Hafnium-178m Hf-178m 0.1
Hafnium-179m Hf-179m 10
Hafnium-180m Hf-180m 1,000
Hafnium-181 Hf-181 10
Hafnium-182m Hf-182m 1,000
Hafnium-182 Hf-182 0.1
Hafnium-183 Hf-183 1,000
Hafnium-184 Hf-184 100
Tantalum-172 Ta-172 1,000
Tantalum-173 Ta-173 1,000
Tantalum-174 Ta-174 1,000
Tantalum-175 Ta-175 1,000
Tantalum-176 Ta-176 100
Tantalum-177 Ta-177 1,000
Tantalum-178 Ta-178 1,000
Tantalum-179 Ta-179 100
Tantalum-180m Ta-180m 1,000
Tantalum-180 Ta-180 100
Tantalum-182m Ta-182m 1,000
Tantalum-182 Ta-182 10
Tantalum-183 Ta-183 100
Tantalum-184 Ta-184 100
Tantalum-185 Ta-185 1,000
Tantalum-186 Ta-186 1,000
Tungsten-176 W-176 1,000
Tungsten-177 W-177 1,000
Tungsten-178 W-178 1,000
Tungsten-179 W-179 1,000
Tungsten-181 W-181 1,000
Tungsten-185 W-185 100
Tungsten-187 W-187 100
Tungsten-188 W-188 10
Rhenium-177 Re-177 1,000
Rhenium-178 Re-178 1,000
Rhenium-181 Re-181 1,000
Rhenium-182 (12.7h) Re-182 1,000
Rhenium-182 (64.0h) Re-182 100
Rhenium-184m Re-184m 10
Rhenium-184 Re-184 100
Rhenium-186m Re-186m 10
Rhenium-186 Re-186 100
Rhenium-187 Re-187 1,000
Rhenium-188m Re-188m 1,000
Rhenium-188 Re-188 100
Rhenium-189 Re-189 100
Osmium-180 Os-180 1,000
Osmium-181 Os-181 1,000
Osmium-182 Os-182 100
Osmium-185 Os-185 100
Osmium-189m Os-189m 1,000
Osmium-191m Os-191m 1,000
Osmium-191 Os-191 100
Osmium-193 Os-193 100
Osmium-194 Os-194 1
Iridium-182 Ir-182 1,000
Iridium-184 Ir-184 1,000
Iridium-185 Ir-185 1,000
Iridium-186 Ir-186 100
Iridium-187 Ir-187 1,000
Iridium-188 Ir-188 100
Iridium-189 Ir-189 100
Iridium-190m Ir-190m 1,000
Iridium-190 Ir-190 100
Iridium-192 (73.8d) Ir-192 1
Iridium-192m (1.4 min.) Ir-192m 10
Iridium-194m Ir-194m 10
Iridium-194 Ir-194 100
Iridium-195m Ir-195m 1,000
Iridium-195 Ir-95 1,000
Platinum-186 Pt-186 1,000
Platinum-188 Pt-188 100
Platinum-189 Pt-189 1,000
Platinum-191 Pt-191 100
Platinum-193m Pt-193m 100
Platinum-193 Pt-193 1,000
Platinum-195m Pt-195m 100
Platinum-197m Pt-197m 1,000
Platinum-197 Pt-197 100
Platinum-199 Pt-199 1,000
Platinum-200 Pt-200 100
Gold-193 Au-193 1,000
Gold-194 Au-194 100
Gold-195 Au-195 10
Gold-198m Au-198m 100
Gold-198 Au-198 100
Gold-199 Au-199 100
Gold-200m Au-200m 100
Gold-200 Au-200 1,000
Gold-201 Au-201 1,000
Mercury-193m Hg-193m 100
Mercury-193 Hg-193 1,000
Mercury-194 Hg-194 1
Mercury-195m Hg-195m 100
Mercury-195 Hg-195 1,000
Mercury-197m Hg-197m 100
Mercury-197 Hg-197 1,000
Mercury-199m Hg-199m 1,000
Mercury-203 Hg-203 100
Thallium-194m Tl-194m 1,000
Thallium-194 Tl-194 1,000
Thallium-195 Tl-195 1,000
Thallium-197 Tl-197 1,000
Thallium-198m Tl-198m 1,000
Thallium-198 Tl-198 1,000
Thallium-199 Tl-199 1,000
Thallium-200 Tl-200 1,000
Thallium-201 Tl-201 1,000
Thallium-202 Tl-202 100
Thallium-204 Tl-204 100
Lead-195m Pb-195m 1,000
Lead-198 Pb-198 1,000
Lead-199 Pb-199 1,000
Lead-200 Pb-200 100
Lead-201 Pb-201 1,000
Lead-202m Pb-202m 1,000
Lead-202 Pb-202 10
Lead-203 Pb-2023 1,000
Lead-205 Pb-205 100
Lead-209 Pb-209 1,000
Lead-210 Pb-210 0.01
Lead-211 Pb-211 100
Lead-212 Pb-212 1
Lead-214 Pb-214 100
Bismuth-200 Bi-200 1,000
Bismuth-201 Bi-201 1,000
Bismuth-202 Bi-202 1,000
Bismuth-203 Bi-203 100
Bismuth-205 Bi-205 100
Bismuth-206 Bi-206 100
Bismuth-207 Bi-207 10
Bismuth-210m Bi-210m 0.1
Bismuth-210 Bi-210 1
Bismuth-212 Bi-212 10
Bismuth-213 Bi-213 10
Bismuth-214 Bi-214 100
Polonium-203 Po-203 1,000
Polonium-205 Po-205 1,000
Polonium-207 Po-207 1,000
Polonium-210 Po-210 0.1
Astatine-207 At-207 100
Astatine-211 At-211 10
Radon-220 Rn-220 1
Radon-222 Rn-222 1
Francium-222 Fr-222 100
Francium-223 Fr-223 100
Radium-223 Ra-223 0.1
Radium-224 Ra-224 0.1
Radium-225 Ra-225 0.1
Radium-226 Ra-226 0.1
Radium-227 Ra-227 1,000
Radium-228 Ra-228 0.1
Actinium-224 Ac-224 1
Actinium-225 Ac-225 0.01
Actinium-226 Ac-226 0.1
Actinium-227 Ac-227 0.001
Actinium-228 Ac-228 1
Thorium-226 Th-226 10
Thorium-227 Th-227 0.01
Thorium-228 Th-228 0.001
Thorium-229 Th-229 0.001
Thorium-230 Th-230 0.001
Thorium-231 Th-231 100
Thorium-232 Th-232 100
Thorium-234 Th-234 10
Thorium-natural   100
Protactinium-227 Pa-227 10
Protactinium-228 Pa-228 1
Protactinium-230 Pa-230 0.01
Protactinium-231 Pa-231 0.001
Protactinium-232 Pa-232 1
Protactinium-233 Pa-233 100
Protactinium-234 Pa-234 100
Uranium-230 U-230 0.01
Uranium-231 U-231 100
Uranium-232 U-232 0.001
Uranium-233 U-233 0.001
Uranium-234 U-234 0.001
Uranium-235 U-235 0.001
Uranium-236 U-236 0.001
Uranium-237 U-237 100
Uranium-238 U-238 100
Uranium-239 U-239 1,000
Uranium-240 U-240 100
Uranium-natural   100
Neptunium-232 Np-232 100
Neptunium-233 Np-233 1,000
Neptunium-234 Np-234 100
Neptunium-235 Np-235 100
Neptunium-236 (1.15x105y) Np-236 0.001
Neptunium-236 (22.5h) Np-236 1
Neptunium-237 Np-237 0.001
Neptunium-238 Np-238 10
Neptunium-239 Np-239 100
Neptunium-240 Np-240 1,000
Plutonium-234 Pu-234 10
Plutonium-235 Pu-235 1,000
Plutonium-236 Pu-236 0.001
Plutonium-237 Pu-237 100
Plutonium-238 Pu-238 0.001
Plutonium-239 Pu-239 0.001
Plutonium-240 Pu-240 0.001
Plutonium-241 Pu-241 0.01
Plutonium-242 Pu-242 0.001
Plutonium-243 Pu-243 1,000
Plutonium-244 Pu-244 0.001
Plutonium-245 Pu-245 100
Americium-237 Am-237 1,000
Americium-238 Am-238 100
Americium-239 Am-239 1,000
Americium-240 Am-240 100
Americium-241 Am-241 0.001
Americium-242m Am-242m 0.001
Americium-242 Am-242 10
Americium-243 Am-243 0.001
Americium-244m Am-244m 100
Americium-244 Am-244 10
Americium-245 Am-245 1,000
Americium-246m Am-246 1,000
Americium-246 Am-246 1,000
Curium-238 Cm-238 100
Curium-240 Cm-240 0.1
Curium-241 Cm-241 1
Curium-242 Cm-242 0.01
Curium-243 Cm-243 0.001
Curium-244 Cm-244 0.001
Curium-245 Cm-245 0.001
Curium-246 Cm-246 0.001
Curium-247 Cm-247 0.001
Curium-248 Cm-248 0.001
Curium-249 Cm-249 1,000
Berkelium-245 Bk-245 100
Berkelium-246 Bk-246 100
Berkelium-247 Bk-247 0.001
Berkelium-249 Bk-249 0.1
Berkelium-250 Bk-250 10
Californium-244 Cf-244 100
Californium-246 Cf-246 1
Californium-248 Cf-248 0.01
Californium-249 Cf-249 0.001
Californium-250 Cf-250 0.001
Californium-251 Cf-251 0.001
Californium-252 Cf-252 0.001
Californium-253 Cf-253 0.1
Californium-254 Cf-254 0.001
Any alpha emitting radionuclide not listed above or mixtures or alpha emitters of unknown composition   0.001
Einsteinium-250 Es-250 100
Einsteinium-251 Es-251 100
Einsteinium-253 Es-253 0.1
Einsteinium-254m Es-254m 1
Einsteinium-254 Es-254 0.01
Fermium-252 Fm-252 1
Fermium-253 Fm-253 1
Fermium-254 Fm-254 10
Fermium-255 Fm-255 1
Fermium-257 Fm-257 0.01
Mendelevium-257 Md-257 10
Mendelevium-258 Md-258 0.01
Any radionuclide other than alpha emitter radionuclides not listed above, or mixtures of beta emitters of unknown composition   0.01

1 The quantities listed above were derived by taking 1/10th of the most restrictive ALI listed in table 1, columns 1 and 2, of appendix B to §§ 20.1001-20.2401 of this part, rounding to the nearest factor of 10, and arbitrarily constraining the values listed between 0.001 and 1,000 µCi. Values of 100 µCi have been assigned for radionuclides having a radioactive half-life in excess of 109 years (except rhenium, 1000 µCi) to take into account their low specific activity.

NOTE: For purposes of §§ 20.1902(e), 20.1905(a), and 20.2201(a) where there is involved a combination of radionuclides in known amounts, the limit for the combination should be derived as follows: determine, for each radionuclide in the combination, the ratio between the quantity present in the combination and the limit otherwise established for the specific radionuclide when not in combination. The sum of such ratios for all radionuclides in the combination may not exceed "1" (i.e., "unity").

[56 FR 23465, May 21, 1991; 56 FR 61352, Dec. 3, 1991. Redesignated and amended at 58 FR 67659, Dec. 22, 1993; 60 FR 20186, Apr. 25, 1995]

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