10 C.F.R. § 20 app C to Part 20

Current through September 30, 2024
Appendix C to Part 20 - Quantities [1] of Licensed Material Requiring Labeling

Radionuclide Quantity ([MICRO]Ci)
Hydrogen-31,000
Beryllium-71,000
Beryllium-101
Carbon-111,000
Carbon-14100
Fluorine-181,000
Sodium-2210
Sodium-24100
Magnesium-28100
Aluminum-2610
Silicon-311,000
Silicon-321
Phosphorus-3210
Phosphorus-33100
Sulfur-35100
Chlorine-3610
Chlorine-381,000
Chlorine-391,000
Argon-391,000
Argon-411,000
Potassium-40100
Potassium-421,000
Potassium-431,000
Potassium-441,000
Potassium-451,000
Calcium-41100
Calcium-45100
Calcium-47100
Scandium-431,000
Scandium-44m100
Scandium-44100
Scandium-4610
Scandium-47100
Scandium-48100
Scandium-491,000
Titanium-441
Titanium-451,000
Vanadium-471,000
Vanadium-48100
Vanadium-491,000
Chromium-481,000
Chromium-491,000
Chromium-511,000
Manganese-511,000
Manganese-52m1,000
Manganese-52100
Manganese-531,000
Manganese-54100
Manganese-561,000
Iron-52100
Iron-55100
Iron-5910
Iron-601
Cobalt-55100
Cobalt-5610
Cobalt-57100
Cobalt-58m1,000
Cobalt-58100
Cobalt-60m1,000
Cobalt-601
Cobalt-611,000
Cobalt-62m1,000
Nickel-56100
Nickel-57100
Nickel-59100
Nickel-63100
Nickel-651,000
Nickel-6610
Copper-601,000
Copper-611,000
Copper-641,000
Copper-671,000
Zinc-62100
Zinc-631,000
Zinc-6510
Zinc-69m100
Zinc-691,000
Zinc-71m1,000
Zinc-72100
Gallium-651,000
Gallium-66100
Gallium-671,000
Gallium-681,000
Gallium-701,000
Gallium-72100
Gallium-731,000
Germanium-661,000
Germanium-671,000
Germanium-6810
Germanium-691,000
Germanium-711,000
Germanium-751,000
Germanium-771,000
Germanium-781,000
Arsenic-691,000
Arsenic-701,000
Arsenic-71100
Arsenic-72100
Arsenic-73100
Arsenic-74100
Arsenic-76100
Arsenic-77100
Arsenic-781,000
Selenium-701,000
Selenium-73m1,000
Selenium-73100
Selenium-75100
Selenium-79100
Selenium-81m1,000
Selenium-811,000
Selenium-831,000
Bromine-74m1,000
Bromine-741,000
Bromine-751,000
Bromine-76100
Bromine-771,000
Bromine-80m1,000
Bromine-801,000
Bromine-82100
Bromine-831,000
Bromine-841,000
Krypton-741,000
Krypton-761,000
Krypton-771,000
Krypton-791,000
Krypton-811,000
Krypton-83m1,000
Krypton-85m1,000
Krypton-851,000
Krypton-871,000
Krypton-881,000
Rubidium-791,000
Rubidium-81m1,000
Rubidium-811,000
Rubidium-82m1,000
Rubidium-83100
Rubidium-84100
Rubidium-86100
Rubidium-87100
Rubidium-881,000
Rubidium-891,000
Strontium-80100
Strontium-811,000
Strontium-83100
Strontium-85m1,000
Strontium-85100
Strontium-87m1,000
Strontium-8910
Strontium-900.1
Strontium-91100
Strontium-92100
Yttrium-86m1,000
Yttrium-86100
Yttrium-87100
Yttrium-8810
Yttrium-90m1,000
Yttrium-9010
Yttrium-91m1,000
Yttrium-9110
Yttrium-92100
Yttrium-93100
Yttrium-941,000
Yttrium-951,000
Zirconium-86100
Zirconium-8810
Zirconium-89100
Zirconium-931
Zirconium-9510
Zirconium-97100
Niobium-881,000
Niobium-89m (66 min)1,000
Niobium-89 (122 min)1,000
Niobium-90100
Niobium-93m10
Niobium-941
Niobium-95m100
Niobium-95100
Niobium-96100
Niobium-971,000
Niobium-981,000
Molybdenum-90100
Molybdenum-93m100
Molybdenum-9310
Molybdenum-99100
Molybdenum-1011,000
Technetium-93m1,000
Technetium-931,000
Technetium-94m1,000
Technetium-941,000
Technetium-96m1,000
Technetium-96100
Technetium-97m100
Technetium-971,000
Technetium-9810
Technetium-99m1,000
Technetium-99100
Technetium-1011,000
Technetium-1041,000
Ruthenium-941,000
Ruthenium-971,000
Ruthenium-103100
Ruthenium-1051,000
Ruthenium-1061
Rhodium-99m1,000
Rhodium-99100
Rhodium-100100
Rhodium-101m1,000
Rhodium-10110
Rhodium-102m10
Rhodium-10210
Rhodium-103m1,000
Rhodium-105100
Rhodium-106m1,000
Rhodium-1071,000
Palladium-100100
Palladium-1011,000
Palladium-103100
Palladium-10710
Palladium-109100
Silver-1021,000
Silver-1031,000
Silver-104m1,000
Silver-1041,000
Silver-105100
Silver-106m100
Silver-1061,000
Silver-108m1
Silver-110m10
Silver-111100
Silver-112100
Silver-1151,000
Cadmium-1041,000
Cadmium-1071,000
Cadmium-1091
Cadmium-113m0.1
Cadmium-113100
Cadmium-115m10
Cadmium-115100
Cadmium-117m1,000
Cadmium-1171,000
Indium-1091,000
Indium-110 (69.1min.)1,000
Indium-110
(4.9h)1,000
Indium-111100
Indium-1121,000
Indium-113m1,000
Indium-114m10
Indium-115m1,000
Indium-115100
Indium-116m1,000
Indium-117m1,000
Indium-1171,000
Indium-119m1,000
Tin-110100
Tin-1111,000
Tin-113100
Tin-117m100
Tin-119m100
Tin-121m100
Tin-1211,000
Tin-123m1,000
Tin-12310
Tin-12510
Tin-12610
Tin-1271,000
Tin-1281,000
Antimony-1151,000
Antimony-116m1,000
Antimony-1161,000
Antimony-1171,000
Antimony-118m1,000
Antimony-1191,000
Antimony-120 (16min.)1,000
Antimony-120 (5.76d)100
Antimony-122100
Antimony-124m1,000
Antimony-12410
Antimony-125100
Antimony-126m1,000
Antimony-126100
Antimony-127100
Antimony-128 (10.4min.)1,000
Antimony-128 (9.01h)100
Antimony-129100
Antimony-1301,000
Antimony-1311,000
Tellurium-1161,000
Tellurium-121m10
Tellurium-121100
Tellurium-123m10
Tellurium-123100
Tellurium-125m10
Tellurium-127m10
Tellurium-1271,000
Tellurium-129m10
Tellurium-1291,000
Tellurium-131m10
Tellurium-131100
Tellurium-13210
Tellurium-133m100
Tellurium-1331,000
Tellurium-1341,000
Iodine-120m1,000
Iodine-120100
Iodine-1211,000
Iodine-123100
Iodine-12410
Iodine-1251
Iodine-1261
Iodine-1281,000
Iodine-1291
Iodine-13010
Iodine-1311
Iodine-132m100
Iodine-132100
Iodine-13310
Iodine-1341,000
Iodine-135100
Xenon-1201,000
Xenon-1211,000
Xenon-1221,000
Xenon-1231,000
Xenon-1251,000
Xenon-1271,000
Xenon-129m1,000
Xenon-131m1,000
Xenon-133m1,000
Xenon-1331,000
Xenon-135m1,000
Xenon-1351,000
Xenon-1381,000
Cesium-1251,000
Cesium-1271,000
Cesium-1291,000
Cesium-1301,000
Cesium-1311,000
Cesium-132100
Cesium-134m1,000
Cesium-13410
Cesium-135m1,000
Cesium-135100
Cesium-13610
Cesium-13710
Cesium-1381,000
Barium-1261,000
Barium-128100
Barium-131m1,000
Barium-131100
Barium-133m100
Barium-133100
Barium-135m100
Barium-1391,000
Barium-140100
Barium-1411,000
Barium-1421,000
Lanthanum-1311,000
Lanthanum-132100
Lanthanum-1351,000
Lanthanum-13710
Lanthanum-138100
Lanthanum-140100
Lanthanum-141100
Lanthanum-1421,000
Lanthanum-1431,000
Cerium-134100
Cerium-135100
Cerium-137m100
Cerium-1371,000
Cerium-139100
Cerium-141100
Cerium-143100
Cerium-1441
Praseodymium-1361,000
Praseodymium-1371,000
Praseodymium-138m1,000
Praseodymium-1391,000
Praseodymium-142m1,000
Praseodymium-142100
Praseodymium-143100
Praseodymium-1441,000
Praseodymium-145100
Praseodymium-1471,000
Neodymium-1361,000
Neodymium-138100
Neodymium-139m1,000
Neodymium-1391,000
Neodymium-1411,000
Neodymium-147100
Neodymium-1491,000
Neodymium-1511,000
Promethium-1411,000
Promethium-143100
Promethium-14410
Promethium-14510
Promethium-1461
Promethium-14710
Promethium-148m10
Promethium-14810
Promethium-149100
Promethium-1501,000
Promethium-151100
Samarium-141m1,000
Samarium-1411,000
Samarium-1421,000
Samarium-145100
Samarium-1461
Samarium-147100
Samarium-15110
Samarium-153100
Samarium-1551,000
Samarium-1561,000
Europium-145100
Europium-146100
Europium-147100
Europium-14810
Europium-149100
Europium-150 (12.62h)100
Europium-150 (34.2y)1
Europium-152m100
Europium-1521
Europium-1541
Europium-15510
Europium-156100
Europium-157100
Europium-1581,000
Gadolinium-1451,000
Gadolinium-14610
Gadolinium-147100
Gadolinium-1480.001
Gadolinium-149100
Gadolinium-15110
Gadolinium-152100
Gadolinium-15310
Gadolinium-159100
Terbium-1471,000
Terbium-149100
Terbium-1501,000
Terbium-151100
Terbium-1531,000
Terbium-154100
Terbium-1551,000
Terbium-156m (5.0h)1,000
Terbium-156m (24.4h)1,000
Terbium-156100
Terbium-15710
Terbium-1581
Terbium-16010
Terbium-161100
Dysprosium-1551,000
Dysprosium-1571,000
Dysprosium-159100
Dysprosium-1651,000
Dysprosium-166100
Holmium-1551,000
Holmium-1571,000
Holmium-1591,000
Holmium-1611,000
Holmium-162m1,000
Holmium-1621,000
Holmium-164m1,000
Holmium-1641,000
Holmium-166m1
Holmium-166100
Holmium-1671,000
Erbium-1611,000
Erbium-1651,000
Erbium-169100
Erbium-171100
Erbium-172100
Thulium-1621,000
Thulium-166100
Thulium-167100
Thulium-17010
Thulium-17110
Thulium-172100
Thulium-173100
Thulium-1751,000
Ytterbium-1621,000
Ytterbium-166100
Ytterbium-1671,000
Ytterbium-169100
Ytterbium-175100
Ytterbium-1771,000
Ytterbium-1781,000
Lutetium-169100
Lutetium-170100
Lutetium-171100
Lutetium-172100
Lutetium-17310
Lutetium-174m10
Lutetium-17410
Lutetium-176m1,000
Lutetium-176100
Lutetium-177m10
Lutetium-177100
Lutetium-178m1,000
Lutetium-1781,000
Lutetium-1791,000
Hafnium-170100
Hafnium-1721
Hafnium-1731,000
Hafnium-175100
Hafnium-177m1,000
Hafnium-178m0.1
Hafnium-179m10
Hafnium-180m1,000
Hafnium-18110
Hafnium-182m1,000
Hafnium-1820.1
Hafnium-1831,000
Hafnium-184100
Tantalum-1721,000
Tantalum-1731,000
Tantalum-1741,000
Tantalum-1751,000
Tantalum-176100
Tantalum-1771,000
Tantalum-1781,000
Tantalum-179100
Tantalum-180m1,000
Tantalum-180100
Tantalum-182m1,000
Tantalum-18210
Tantalum-183100
Tantalum-184100
Tantalum-1851,000
Tantalum-1861,000
Tungsten-1761,000
Tungsten-1771,000
Tungsten-1781,000
Tungsten-1791,000
Tungsten-1811,000
Tungsten-185100
Tungsten-187100
Tungsten-18810
Rhenium-1771,000
Rhenium-1781,000
Rhenium-1811,000
Rhenium-182 (12.7h)1,000
Rhenium-182 (64.0h)100
Rhenium-184m10
Rhenium-184100
Rhenium-186m10
Rhenium-186100
Rhenium-1871,000
Rhenium-188m1,000
Rhenium-188100
Rhenium-189100
Osmium-1801,000
Osmium-1811,000
Osmium-182100
Osmium-185100
Osmium-189m1,000
Osmium-191m1,000
Osmium-191100
Osmium-193100
Osmium-1941
Iridium-1821,000
Iridium-1841,000
Iridium-1851,000
Iridium-186100
Iridium-1871,000
Iridium-188100
Iridium-189100
Iridium-190m1,000
Iridium-190100
Iridium-192 (73.8d)1
Iridium-192m (1.4min.)10
Iridium-194m10
Iridium-194100
Iridium-195m1,000
Iridium-1951,000
Platinum-1861,000
Platinum-188100
Platinum-1891,000
Platinum-191100
Platinum-193m100
Platinum-1931,000
Platinum-195m100
Platinum-197m1,000
Platinum-197100
Platinum-1991,000
Platinum-200100
Gold-1931,000
Gold-194100
Gold-19510
Gold-198m100
Gold-198100
Gold-199100
Gold-200m100
Gold-2001,000
Gold-2011,000
Mercury-193m100
Mercury-1931,000
Mercury-1941
Mercury-195m100
Mercury-1951,000
Mercury-197m100
Mercury-1971,000
Mercury-199m1,000
Mercury-203100
Thallium-194m1,000
Thallium-1941,000
Thallium-1951,000
Thallium-1971,000
Thallium-198m1,000
Thallium-1981,000
Thallium-1991,000
Thallium-2001,000
Thallium-2011,000
Thallium-202100
Thallium-204100
Lead-195m1,000
Lead-1981,000
Lead-1991,000
Lead-200100
Lead-2011,000
Lead-202m1,000
Lead-20210
Lead-2031,000
Lead-205100
Lead-2091,000
Lead-2100.01
Lead-211100
Lead-2121
Lead-214100
Bismuth-2001,000
Bismuth-2011,000
Bismuth-2021,000
Bismuth-203100
Bismuth-205100
Bismuth-206100
Bismuth-20710
Bismuth-210m0.1
Bismuth-2101
Bismuth-21210
Bismuth-21310
Bismuth-214100
Polonium-2031,000
Polonium-2051,000
Polonium-2071,000
Polonium-2100.1
Astatine-207100
Astatine-21110
Radon-2201
Radon-2221
Francium-222100
Francium-223100
Radium-2230.1
Radium-2240.1
Radium-2250.1
Radium-2260.1
Radium-2271,000
Radium-2280.1
Actinium-2241
Actinium-2250.01
Actinium-2260.1
Actinium-2270.001
Actinium-2281
Thorium-22610
Thorium-2270.01
Thorium-2280.001
Thorium-2290.001
Thorium-2300.001
Thorium-231100
Thorium-232100
Thorium-23410
Thorium-natural100
Protactinium-22710
Protactinium-2281
Protactinium-2300.1
Protactinium-2310.001
Protactinium-2321
Protactinium-233100
Protactinium-234100
Uranium-2300.01
Uranium-231100
Uranium-2320.001
Uranium-2330.001
Uranium-2340.001
Uranium-2350.001
Uranium-2360.001
Uranium-237100
Uranium-238100
Uranium-2391,000
Uranium-240100
Uranium-natural100
Neptunium-232100
Neptunium-2331,000
Neptunium-234100
Neptunium-235100
Neptunium-236 (1.15 * 105 y)0.001
Neptunium-236 (22.5h)1
Neptunium-2370.001
Neptunium-23810
Neptunium-239100
Neptunium-2401,000
Plutonium-23410
Plutonium-2351,000
Plutonium-2360.001
Plutonium-237100
Plutonium-2380.001
Plutonium-2390.001
Plutonium-2400.001
Plutonium-2410.01
Plutonium-2420.001
Plutonium-2431,000
Plutonium-2440.001
Plutonium-245100
Americium-2371,000
Americium-238100
Americium-2391,000
Americium-240100
Americium-2410.001
Americium-242m0.001
Americium-24210
Americium-2430.001
Americium-244m100
Americium-24410
Americium-2451,000
Americium-246m1,000
Americium-2461,000
Curium-238100
Curium-2400.1
Curium-2411
Curium-2420.01
Curium-2430.001
Curium-2440.001
Curium-2450.001
Curium-2460.001
Curium-2470.001
Curium-2480.001
Curium-2491,000
Berkelium-245100
Berkelium-246100
Berkelium-2470.001
Berkelium-2490.1
Berkelium-25010
Californium-244100
Californium-2461
Californium-2480.01
Californium-2490.001
Californium-2500.001
Californium-2510.001
Californium-2520.001
Californium-2530.1
Californium-2540.001
Any alpha emitting radionuclide not listed above or mixtures of alpha emitters of unknown composition0.001
Einsteinium-250100
Einsteinium-251100
Einsteinium-2530.1
Einsteinium-254m1
Einsteinium-2540.01
Fermium-2521
Fermium-2531
Fermium-25410
Fermium-2551
Fermium-2570.01
Mendelevium-25710
Mendelevium-2580.01
Any radionuclide other than alpha emitting radionuclides not listed above, or mixtures of beta emitters of unknown composition0.01

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 [MICRO]Ci. Values of 100 [MICRO]Ci have been assigned for radionuclides having a radioactive half-life in excess of 109 years (except rhenium, 1000 [MICRO]Ci) 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").

10 C.F.R. 20 app C to Part 20

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