Statutes, codes, and regulations
Code of Federal Regulations
Title 49 - TRANSPORTATIONSubtitle B - OTHER REGULATIONS RELATING TO TRANSPORTATIONChapter I - PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONSubchapter C - HAZARDOUS MATERIALS REGULATIONSPart 173 - SHIPPERS-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS
Subpart I - CLASS 7 (RADIOACTIVE) MATERIALS
Section 173.435 - Table of A[1] and A[2] values for radionuclides

49 C.F.R. § 173.435

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Current through October 31, 2024
Section 173.435 - Table of A[1] and A[2] values for radionuclides

The table of A1 and A2 values for radionuclides is as follows:

Symbol of
radionuclide		Element and
atomic number		 A1 (TBq) A1 (Ci)b A2 (TBq) A2 (Ci)bSpecific activity
(TBq/g) (Ci/g)
Ac-225 (a)Actinium (89)8.0 * 10-12.2 * 1016.0 * 10-31.6 * 10-12.1 * 1035.8 * 104
Ac-227 (a)9.0 * 10-12.4 * 1019.0 * 10-52.4 * 10-32.77.2 * 101
Ac-2286.0 * 10-11.6 * 1015.0 * 10-11.4 * 1018.4 * 1042.2 * 106
Ag-105Silver (47)2.05.4 * 1012.05.4 * 1011.1 * 1033.0 * 104
Ag-108m (a)7.0 * 10-11.9 * 1017.0 * 10-11.9 * 1019.7 * 10-12.6 * 101
Ag-110m (a)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1011.8 * 1024.7 * 103
Ag-1112.05.4 * 1016.0 * 10-11.6 * 1015.8 * 1031.6 * 105
Al-26Aluminum (13)1.0 * 10-12.71.0 * 10-12.77.0 * 10-41.9 * 10-2
Am-241Americium (95)1.0 * 1012.7 * 1021.0 * 10-32.7 * 10-21.3 * 10-13.4
Am-242m (a)1.0 * 1012.7 * 1021.0 * 10-32.7 * 10-23.6 * 10-11.0 * 101
Am-243 (a)5.01.4 * 1021.0 * 10-32.7 * 10-27.4 * 10-32.0 * 10-1
Ar-37Argon (18)4.0 * 1011.1 * 1034.0 * 1011.1 * 1033.7 * 1039.9 * 104
Ar-394.0 * 1011.1 * 1032.0 * 1015.4 * 1021.33.4 * 101
Ar-413.0 * 10-18.13.0 * 10-18.11.5 * 1064.2 * 107
As-72Arsenic (33)3.0 * 10-18.13.0 * 10-18.16.2 * 1041.7 * 106
As-734.0 * 1011.1 * 1034.0 * 1011.1 * 1038.2 * 1022.2 * 104
As-741.02.7 * 1019.0 * 10-12.4 * 1013.7 * 1039.9 * 104
As-763.0 * 10-18.13.0 * 10-18.15.8 * 1041.6 * 106
As-772.0 * 1015.4 * 1027.0 * 10-11.9 * 1013.9 * 1041.0 * 106
At-211 (a)Astatine (85)2.0 * 1015.4 * 1025.0 * 10-11.4 * 1017.6 * 1042.1 * 106
Au-193Gold (79)7.01.9 * 1022.05.4 * 1013.4 * 1049.2 * 105
Au-1941.02.7 * 1011.02.7 * 1011.5 * 1044.1 * 105
Au-1951.0 * 1012.7 * 1026.01.6 * 1021.4 * 1023.7 * 103
Au-1981.02.7 * 1016.0 * 10-11.6 * 1019.0 * 1032.4 * 105
Au-1991.0 * 1012.7 * 1026.0 * 10-11.6 * 1017.7 * 1032.1 * 105
Ba-131 (a)Barium (56)2.05.4 * 1012.05.4 * 1013.1 * 1038.4 * 104
Ba-1333.08.1 * 1013.08.1 * 1019.42.6 * 102
Ba-133m2.0 * 1015.4 * 1026.0 * 10-11.6 * 1012.2 * 1046.1 * 105
Ba-140 (a)5.0 * 10-11.4 * 1013.0 * 10-18.12.7 * 1037.3 * 104
Be-7Beryllium (4)2.0 * 1015.4 * 1022.0 * 1015.4 * 1021.3 * 1043.5 * 105
Be-104.0 * 1011.1 * 1036.0 * 10-11.6 * 1018.3 * 10-42.2 * 10-2
Bi-205Bismuth (83)7.0 * 10-11.9 * 1017.0 * 10-11.9 * 1011.5 * 1034.2 * 104
Bi-2063.0 * 10-18.13.0 * 10-18.13.8 * 1031.0 * 105
Bi-2077.0 * 10-11.9 * 1017.0 * 10-11.9 * 1011.95.2 * 101
Bi-2101.02.7 * 1016.0 * 10-11.6 * 1014.6 * 1031.2 * 105
Bi-210m (a)6.0 * 10-11.6 * 1012.0 * 10-25.4 * 10-12.1 * 10-55.7 * 10-4
Bi-212 (a)7.0 * 10-11.9 * 1016.0 * 10-11.6 * 1015.4 * 1051.5 * 107
Bk-247Berkelium (97)8.02.2 * 1028.0 * 10-42.2 * 10-23.8 * 10-21.0
Bk-249 (a)4.0 * 1011.1 * 1033.0 * 10-18.16.1 * 1011.6 * 103
Br-76Bromine (35)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1019.4 * 1042.5 * 106
Br-773.08.1 * 1013.08.1 * 1012.6 * 1047.1 * 105
Br-824.0 * 10-11.1 * 1014.0 * 10-11.1 * 1014.0 * 1041.1 * 106
C-11Carbon (6)1.02.7 * 1016.0 * 10-11.6 * 1013.1 * 1078.4 * 108
C-144.0 * 1011.1 * 1033.08.1 * 1011.6 * 10-14.5
Ca-41Calcium (20)UnlimitedUnlimitedUnlimitedUnlimited3.1 * 10-38.5 * 10-2
Ca-454.0 * 1011.1 * 1031.02.7 * 1016.6 * 1021.8 * 104
Ca-47 (a)3.08.1 * 1013.0 * 10-18.12.3 * 1046.1 * 105
Cd-109Cadmium (48)3.0 * 1018.1 * 1022.05.4 * 1019.6 * 1012.6 * 103
Cd-113m4.0 * 1011.1 * 1035.0 * 10-11.4 * 1018.32.2 * 102
Cd-115 (a)3.08.1 * 1014.0 * 10-11.1 * 1011.9 * 1045.1 * 105
Cd-115m5.0 * 10-11.4 * 1015.0 * 10-11.4 * 1019.4 * 1022.5 * 104
Ce-139Cerium (58)7.01.9 * 1022.05.4 * 1012.5 * 1026.8 * 103
Ce-1412.0 * 1015.4 * 1026.0 * 10-11.6 * 1011.1 * 1032.8 * 104
Ce-1439.0 * 10-12.4 * 1016.0 * 10-11.6 * 1012.5 * 1046.6 * 105
Ce-144 (a)2.0 * 10-15.42.0 * 10-15.41.2 * 1023.2 * 103
Cf-248Californium (98)4.0 * 1011.1 * 1036.0 * 10-31.6 * 10-15.8 * 1011.6 * 103
Cf-2493.08.1 * 1018.0 * 10-42.2 * 10-21.5 * 10-14.1
Cf-2502.0 * 1015.4 * 1022.0 * 10-35.4 * 10-24.01.1 * 102
Cf-2517.01.9 * 1027.0 * 10-41.9 * 10-25.9 * 10-21.6
Cf-2521 * 10-12.73.0 * 10-38.1 * 10-22.0 * 1015.4 * 102
Cf-253 (a)4.0 * 1011.1 * 1034.0 * 10-21.11.1 * 1032.9 * 104
Cf-2541.0 * 10-32.7 * 10-21.0 * 10-32.7 * 10-23.1 * 1028.5 * 103
Cl-36Chlorine (17)1.0 * 1012.7 * 1026.0 * 10-11.6 * 1011.2 * 10-33.3 * 10-2
Cl-382.0 * 10-15.42.0 * 10-15.44.9 * 1061.3 * 108
Cm-240Curium (96)4.0 * 1011.1 * 1032.0 * 10-25.4 * 10-17.5 * 1022.0 * 104
Cm-2412.05.4 * 1011.02.7 * 1016.1 * 1021.7 * 104
Cm-2424.0 * 1011.1 * 1031.0 * 10-22.7 * 10-11.2 * 1023.3 * 103
Cm-2439.02.4 * 1021.0 * 10-32.7 * 10-21.95.2 * 101
Cm-2442.0 * 1015.4 * 1022.0 * 10-35.4 * 10-23.08.1 * 101
Cm-2459.02.4 * 1029.0 * 10-42.4 * 10-26.4 * 10-31.7 * 10-1
Cm-2469.02.4 * 1029.0 * 10-42.4 * 10-21.1 * 10-23.1 * 10-1
Cm-247 (a)3.08.1 * 1011.0 * 10-32.7 * 10-23.4 * 10-69.3 * 10-5
Cm-2482.0 * 10-25.4 * 10-13.0 * 10-48.1 * 10-31.6 * 10-44.2 * 10-3
Co-55Cobalt (27)5.0 * 10-11.4 * 1015.0 * 10-11.4 * 1011.1 * 1053.1 * 106
Co-563.0 * 10-18.13.0 * 10-18.11.1 * 1033.0 * 104
Co-571.0 * 1012.7 * 1021.0 * 1012.7 * 1023.1 * 1028.4 * 103
Co-581.02.7 * 1011.02.7 * 1011.2 * 1033.2 * 104
Co-58m4.0 * 1011.1 * 1034.0 * 1011.1 * 1032.2 * 1055.9 * 106
Co-604.0 * 10-11.1 * 1014.0 * 10-11.1 * 1014.2 * 1011.1 * 103
Cr-51Chromium (24)3.0 * 1018.1 * 1023.0 * 1018.1 * 1023.4 * 1039.2 * 104
Cs-129Cesium (55)4.01.1 * 1024.01.1 * 1022.8 * 1047.6 * 105
Cs-1313.0 * 1018.1 * 1023.0 * 1018.1 * 1023.8 * 1031.0 * 105
Cs-1321.02.7 * 1011.02.7 * 1015.7 * 1031.5 * 105
Cs-1347.0 * 10-11.9 * 1017.0 * 10-11.9 * 1014.8 * 1011.3 * 103
Cs-134m4.0 * 1011.1 * 1036.0 * 10-11.6 * 1013.0 * 1058.0 * 106
Cs-1354.0 * 1011.1 * 1031.02.7 * 1014.3 * 10-51.2 * 10-3
Cs-1365.0 * 10-11.4 * 1015.0 * 10-11.4 * 1012.7 * 1037.3 * 104
Cs-137 (a)2.05.4 * 1016.0 * 10-11.6 * 1013.28.7 * 101
Cu-64Copper (29)6.01.6 * 1021.02.7 * 1011.4 * 1053.9 * 106
Cu-671.0 * 1012.7 * 1027.0 * 10-11.9 * 1012.8 * 1047.6 * 105
Dy-159Dysprosium (66)2.0 * 1015.4 * 1022.0 * 1015.4 * 1022.1 * 1025.7 * 103
Dy-1659.0 * 10-12.4 * 1016.0 * 10-11.6 * 1013.0 * 1058.2 * 106
Dy-166 (a)9.0 * 10-12.4 * 1013.0 * 10-18.18.6 * 1032.3 * 105
Er-169Erbium (68)4.0 * 1011.1 * 1031.02.7 * 1013.1 * 1038.3 * 104
Er-1718.0 * 10-12.2 * 1015.0 * 10-11.4 * 1019.0 * 1042.4 * 106
Eu-147Europium (63)2.05.4 * 1012.05.4 * 1011.4 * 1033.7 * 104
Eu-1485.0 * 10-11.4 * 1015.0 * 10-11.4 * 1016.0 * 1021.6 * 104
Eu-1492.0 * 1015.4 * 1022.0 * 1015.4 * 1023.5 * 1029.4 * 103
Eu-150 (short lived)2.05.4 * 1017.0 * 10-11.9 * 1016.1 * 1041.6 * 106
Eu-150 (long lived)7.0 * 10-11.9 * 1017.0 * 10-11.9 * 1016.1 * 1041.6 * 106
Eu-1521.02.7 * 1011.02.7 * 1016.51.8 * 102
Eu-152m8.0 * 10-12.2 * 1018.0 * 10-12.2 * 1018.2 * 1042.2 * 106
Eu-1549.0 * 10-12.4 * 1016.0 * 10-11.6 * 1019.82.6 * 102
Eu-1552.0 * 1015.4 * 1023.08.1 * 1011.8 * 1014.9 * 102
Eu-1567.0 * 10-11.9 * 1017.0 * 10-11.9 * 1012.0 * 1035.5 * 104
F-18Fluorine (9)1.02.7 * 1016.0 * 10-11.6 * 1013.5 * 1069.5 * 107
Fe-52 (a)Iron (26)3.0 * 10-18.13.0 * 10-18.12.7 * 1057.3 * 106
Fe-554.0 * 1011.1 * 1034.0 * 1011.1 * 1038.8 * 1012.4 * 103
Fe-599.0 * 10-12.4 * 1019.0 * 10-12.4 * 1011.8 * 1035.0 * 104
Fe-60 (a)4.0 * 1011.1 * 1032.0 * 10-15.47.4 * 10-42.0 * 10-2
Ga-67Gallium (31)7.01.9 * 1023.08.1 * 1012.2 * 1046.0 * 105
Ga-685.0 * 10-11.4 * 1015.0 * 10-11.4 * 1011.5 * 1064.1 * 107
Ga-724.0 * 10-11.1 * 1014.0 * 10-11.1 * 1011.1 * 1053.1 * 106
Gd-146 (a)Gadolinium (64)5.0 * 10-11.4 * 1015.0 * 10-11.4 * 1016.9 * 1021.9 * 104
Gd-1482.0 * 1015.4 * 1022.0 * 10-35.4 * 10-21.23.2 * 101
Gd-1531.0 * 1012.7 * 1029.02.4 * 1021.3 * 1023.5 * 103
Gd-1593.08.1 * 1016.0 * 10-11.6 * 1013.9 * 1041.1 * 106
Ge-68 (a)Germanium (32)5.0 * 10-11.4 * 1015.0 * 10-11.4 * 1012.6 * 1027.1 * 103
Ge-714.0 * 1011.1 * 1034.0 * 1011.1 * 1035.8 * 1031.6 * 105
Ge-773.0 * 10-18.13.0 * 10-18.11.3 * 1053.6 * 106
Hf-172 (a)Hafnium (72)6.0 * 10-11.6 * 1016.0 * 10-11.6 * 1014.1 * 1011.1 * 103
Hf-1753.08.1 * 1013.08.1 * 1013.9 * 1021.1 * 104
Hf-1812.05.4 * 1015.0 * 10-11.4 * 1016.3 * 1021.7 * 104
Hf-182UnlimitedUnlimitedUnlimitedUnlimited8.1 * 10-62.2 * 10-4
Hg-194 (a)Mercury (80)1.02.7 * 1011.02.7 * 1011.3 * 10-13.5
Hg-195m (a)3.08.1 * 1017.0 * 10-11.9 * 1011.5 * 1044.0 * 105
Hg-1972.0 * 1015.4 * 1021.0 * 1012.7 * 1029.2 * 1032.5 * 105
Hg-197m1.0 * 1012.7 * 1024.0 * 10-11.1 * 1012.5 * 1046.7 * 105
Hg-2035.01.4 * 1021.02.7 * 1015.1 * 1021.4 * 104
Ho-166Holmium (67)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1012.6 * 1047.0 * 105
Ho-166m6.0 * 10-11.6 * 1015.0 * 10-11.4 * 1016.6 * 10-21.8
I-123Iodine (53)6.01.6 * 1023.08.1 * 1017.1 * 1041.9 * 106
I-1241.02.7 * 1011.02.7 * 1019.3 * 1032.5 * 105
I-1252.0 * 1015.4 * 1023.08.1 * 1016.4 * 1021.7 * 104
I-1262.05.4 * 1011.02.7 * 1012.9 * 1038.0 * 104
I-129UnlimitedUnlimitedUnlimitedUnlimited6.5 * 10-61.8 * 10-4
I-1313.08.1 * 1017.0 * 10-11.9 * 1014.6 * 1031.2 * 105
I-1324.0 * 10-11.1 * 1014.0 * 10-11.1 * 1013.8 * 1051.0 * 107
I-1337.0 * 10-11.9 * 1016.0 * 10-11.6 * 1014.2 * 1041.1 * 106
I-1343.0 * 10-18.13.0 * 10-18.19.9 * 1052.7 * 107
I-135 (a)6.0 * 10-11.6 * 1016.0 * 10-11.6 * 1011.3 * 1053.5 * 106
In-111Indium (49)3.08.1 * 1013.08.1 * 1011.5 * 1044.2 * 105
In-113m4.01.1 * 1022.05.4 * 1016.2 * 1051.7 * 107
In-114m (a)1.0 * 1012.7 * 1025.0 * 10-11.4 * 1018.6 * 1022.3 * 104
In-115m7.01.9 * 1021.02.7 * 1012.2 * 1056.1 * 106
Ir-189 (a)Iridium (77)1.0 * 1012.7 * 1021.0 * 1012.7 * 1021.9 * 1035.2 * 104
Ir-1907.0 * 10-11.9 * 1017.0 * 10-11.9 * 1012.3 * 1036.2 * 104
Ir-192 (c)1.02.7 * 1016.0 * 10-11.6 * 1013.4 * 1029.2 * 103
Ir-1943.0 * 10-18.13.0 * 10-18.13.1 * 1048.4 * 105
K-40Potassium (19)9.0 * 10-12.4 * 1019.0 * 10-12.4 * 1012.4 * 10-76.4 * 10-6
K-422.0 * 10-15.42.0 * 10-15.42.2 * 1056.0 * 106
K-437.0 * 10-11.9 * 1016.0 * 10-11.6 * 1011.2 * 1053.3 * 106
Kr-79Krypton (36)4.0 * 1001.1 * 1022.0 * 1005.4 * 1014.2 * 1041.1 * 106
Kr-81Krypton (36)4.0 * 1011.1 * 1034.0 * 1011.1 * 1037.8 * 10-42.1 * 10-2
Kr-851.0 * 1012.7 * 1021.0 * 1012.7 * 1021.5 * 1013.9 * 102
Kr-85m8.02.2 * 1023.08.1 * 1013.0 * 1058.2 * 106
Kr-872.0 * 10-15.42.0 * 10-15.41.0 * 1062.8 * 107
La-137Lanthanum (57)3.0 * 1018.1 * 1026.01.6 * 1021.6 * 10-34.4 * 10-2
La-1404.0 * 10-11.1 * 1014.0 * 10-11.1 * 1012.1 * 1045.6 * 105
Lu-172Lutetium (71)6.0 * 10-11.6 * 1016.0 * 10-11.6 * 1014.2 * 1031.1 * 105
Lu-1738.02.2 * 1028.02.2 * 1025.6 * 1011.5 * 103
Lu-1749.02.4 * 1029.02.4 * 1022.3 * 1016.2 * 102
Lu-174m2.0 * 1015.4 * 1021.0 * 1012.7 * 1022.0 * 1025.3 * 103
Lu-1773.0 * 1018.1 * 1027.0 * 10-11.9 * 1014.1 * 1031.1 * 105
Mg-28 (a)Magnesium (12)3.0 * 10-18.13.0 * 10-18.12.0 * 1055.4 * 106
Mn-52Manganese (25)3.0 * 10-18.13.0 * 10-18.11.6 * 1044.4 * 105
Mn-53UnlimitedUnlimitedUnlimitedUnlimited6.8 * 10-51.8 * 10-3
Mn-541.02.7 * 1011.02.7 * 1012.9 * 1027.7 * 103
Mn-563.0 * 10-18.13.0 * 10-18.18.0 * 1052.2 * 107
Mo-93Molybdenum (42)4.0 * 1011.1 * 1032.0 * 1015.4 * 1024.1 * 10-21.1
Mo-99(a)(i)1.02.7 * 1016.0 * 10-11.6 * 1011.8 * 1044.8 * 105
N-13Nitrogen (7)9.0 * 10-12.4 * 1016.0 * 10-11.6 * 1015.4 * 1071.5 * 109
Na-22Sodium (11)5.0 * 10-11.4 * 1015.0 * 10-11.4 * 1012.3 * 1026.3 * 103
Na-242.0 * 10-15.42.0 * 10-15.43.2 * 1058.7 * 106
Nb-93mNiobium (41)4.0 * 1011.1 * 1033.0 * 1018.1 * 1028.82.4 * 102
Nb-947.0 * 10-11.9 * 1017.0 * 10-11.9 * 1016.9 * 10-31.9 * 10-1
Nb-951.02.7 * 1011.02.7 * 1011.5 * 1033.9 * 104
Nb-979.0 * 10-12.4 * 1016.0 * 10-11.6 * 1019.9 * 1052.7 * 107
Nd-147Neodymium (60)6.01.6 * 1026.0 * 10-11.6 * 1013.0 * 1038.1 * 104
Nd-1496.0 * 10-11.6 * 1015.0 * 10-11.4 * 1014.5 * 1051.2 * 107
Ni-59Nickel (28)UnlimitedUnlimitedUnlimitedUnlimited3.0 * 10-38.0 * 10-2
Ni-634.0 * 1011.1 * 1033.0 * 1018.1 * 1022.15.7 * 101
Ni-654.0 * 10-11.1 * 1014.0 * 10-11.1 * 1017.1 * 1051.9 * 107
Np-235Neptunium (93)4.0 * 1011.1 * 1034.0 * 1011.1 * 1035.2 * 1011.4 * 103
Np-236 (short-lived)2.0 * 1015.4 * 1022.05.4 * 1014.7 * 10-41.3 * 10-2
Np-236 (long-lived)9.0 * 1002.4 * 1022.0 * 10-25.4 * 10-14.7 * 10-41.3 * 10-2
Np-2372.0 * 1015.4 * 1022.0 * 10-35.4 * 10-22.6 * 10-57.1 * 10-4
Np-2397.01.9 * 1024.0 * 10-11.1 * 1018.6 * 1032.3 * 105
Os-185Osmium (76)1.02.7 * 1011.02.7 * 1012.8 * 1027.5 * 103
Os-1911.0 * 1012.7 * 1022.05.4 * 1011.6 * 1034.4 * 104
Os-191m4.0 * 1011.1 * 1033.0 * 1018.1 * 1024.6 * 1041.3 * 106
Os-1932.05.4 * 1016.0 * 10-11.6 * 1012.0 * 1045.3 * 105
Os-194 (a)3.0 * 10-18.13.0 * 10-18.11.1 * 1013.1 * 102
P-32Phosphorus (15)5.0 * 10-11.4 * 1015.0 * 10-11.4 * 1011.1 * 1042.9 * 105
P-334.0 * 1011.1 * 1031.02.7 * 1015.8 * 1031.6 * 105
Pa-230 (a)Protactinium (91)2.05.4 * 1017.0 * 10-21.91.2 * 1033.3 * 104
Pa-2314.01.1 * 1024.0 * 10-41.1 * 10-21.7 * 10-34.7 * 10-2
Pa-2335.01.4 * 1027.0 * 10-11.9 * 1017.7 * 1022.1 * 104
Pb-201Lead (82)1.02.7 * 1011.02.7 * 1016.2 * 1041.7 * 106
Pb-2024.0 * 1011.1 * 1032.0 * 1015.4 * 1021.2 * 10-43.4 * 10-3
Pb-2034.01.1 * 1023.08.1 * 1011.1 * 1043.0 * 105
Pb-205UnlimitedUnlimitedUnlimitedUnlimited4.5 * 10-61.2 * 10-4
Pb-210 (a)1.02.7 * 1015.0 * 10-21.42.87.6 * 101
Pb-212 (a)7.0 * 10-11.9 * 1012.0 * 10-15.45.1 * 1041.4 * 106
Pd-103 (a)Palladium (46)4.0 * 1011.1 * 1034.0 * 1011.1 * 1032.8 * 1037.5 * 104
Pd-107UnlimitedUnlimitedUnlimitedUnlimited1.9 * 10-55.1 * 10-4
Pd-1092.05.4 * 1015.0 * 10-11.4 * 1017.9 * 1042.1 * 106
Pm-143Promethium (61)3.08.1 * 1013.08.1 * 1011.3 * 1023.4 * 103
Pm-1447.0 * 10-11.9 * 1017.0 * 10-11.9 * 1019.2 * 1012.5 * 103
Pm-1453.0 * 1018.1 * 1021.0 * 1012.7 * 1025.21.4 * 102
Pm-1474.0 * 1011.1 * 1032.05.4 * 1013.4 * 1019.3 * 102
Pm-148m (a)8.0 * 10-12.2 * 1017.0 * 10-11.9 * 1017.9 * 1022.1 * 104
Pm-1492.05.4 * 1016.0 * 10-11.6 * 1011.5 * 1044.0 * 105
Pm-1512.05.4 * 1016.0 * 10-11.6 * 1012.7 * 1047.3 * 105
Po-210Polonium (84)4.0 * 1011.1 * 1032.0 * 10-25.4 * 10-11.7 * 1024.5 * 103
Pr-142Praseodymium (59)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1014.3 * 1041.2 * 106
Pr-1433.08.1 * 1016.0 * 10-11.6 * 1012.5 * 1036.7 * 104
Pt-188 (a)Platinum (78)1.02.7 * 1018.0 * 10-12.2 * 1012.5 * 1036.8 * 104
Pt-1914.01.1 * 1023.08.1 * 1018.7 * 1032.4 * 105
Pt-1934.0 * 1011.1 * 1034.0 * 1011.1 * 1031.43.7 * 101
Pt-193m4.0 * 1011.1 * 1035.0 * 10-11.4 * 1015.8 * 1031.6 * 105
Pt-195m1.0 * 1012.7 * 1025.0 * 10-11.4 * 1016.2 * 1031.7 * 105
Pt-1972.0 * 1015.4 * 1026.0 * 10-11.6 * 1013.2 * 1048.7 * 105
Pt-197m1.0 * 1012.7 * 1026.0 * 10-11.6 * 1013.7 * 1051.0 * 107
Pu-236Plutonium (94)3.0 * 1018.1 * 1023.0 * 10-38.1 * 10-22.0 * 1015.3 * 102
Pu-2372.0 * 1015.4 * 1022.0 * 1015.4 * 1024.5 * 1021.2 * 104
Pu-2381.0 * 1012.7 * 1021.0 * 10-32.7 * 10-26.3 * 10-11.7 * 101
Pu-2391.0 * 1012.7 * 1021.0 * 10-32.7 * 10-22.3 * 10-36.2 * 10-2
Pu-2401.0 * 1012.7 * 1021.0 * 10-32.7 * 10-28.4 * 10-32.3 * 10-1
Pu-241 (a)4.0 * 1011.1 * 1036.0 * 10-21.63.81.0 * 102
Pu-2421.0 * 1012.7 * 1021.0 * 10-32.7 * 10-21.5 * 10-43.9 * 10-3
Pu-244 (a)4.0 * 10-11.1 * 1011.0 * 10-32.7 * 10-26.7 * 10-71.8 * 10-5
Ra-223 (a)Radium (88)4.0 * 10-11.1 * 1017.0 * 10-31.9 * 10-11.9 * 1035.1 * 104
Ra-224 (a)4.0 * 10-11.1 * 1012.0 * 10-25.4 * 10-15.9 * 1031.6 * 105
Ra-225 (a)2.0 * 10-15.44.0 * 10-31.1 * 10-11.5 * 1033.9 * 104
Ra-226 (a)2.0 * 10-15.43.0 * 10-38.1 * 10-23.7 * 10-21.0
Ra-228 (a)6.0 * 10-11.6 * 1012.0 * 10-25.4 * 10-11.0 * 1012.7 * 102
Rb-81Rubidium (37)2.05.4 * 1018.0 * 10-12.2 * 1013.1 * 1058.4 * 106
Rb-83 (a)2.05.4 * 1012.05.4 * 1016.8 * 1021.8 * 104
Rb-841.02.7 * 1011.02.7 * 1011.8 * 1034.7 * 104
Rb-865.0 * 10-11.4 * 1015.0 * 10-11.4 * 1013.0 * 1038.1 * 104
Rb-87UnlimitedUnlimitedUnlimitedUnlimited3.2 * 10-98.6 * 10-8
Rb(nat)UnlimitedUnlimitedUnlimitedUnlimited6.7 * 10 -101.8 * 10 -8
Re-184Rhenium (75)1.02.7 * 1011.02.7 * 1016.9 * 1021.9 * 104
Re-184m3.08.1 * 1011.02.7 * 1011.6 * 1024.3 * 103
Re-1862.05.4 * 1016.0 * 10-11.6 * 1016.9 * 1031.9 * 105
Re-187UnlimitedUnlimitedUnlimitedUnlimited1.4 * 10-93.8 * 10-8
Re-1884.0 * 10-11.1 * 1014.0 * 10-11.1 * 1013.6 * 1049.8 * 105
Re-189 (a)3.08.1 * 1016.0 * 10-11.6 * 1012.5 * 1046.8 * 105
Re(nat)UnlimitedUnlimitedUnlimitedUnlimited0.02.4 * 10-8
Rh-99Rhodium (45)2.05.4 * 1012.05.4 * 1013.0 * 1038.2 * 104
Rh-1014.01.1 * 1023.08.1 * 1014.1 * 1011.1 * 103
Rh-1025.0 * 10-11.4 * 1015.0 * 10-11.4 * 1014.5 * 1011.2 * 103
Rh-102m2.05.4 * 1012.05.4 * 1012.3 * 1026.2 * 103
Rh-103m4.0 * 1011.1 * 1034.0 * 1011.1 * 1031.2 * 1063.3 * 107
Rh-1051.0 * 1012.7 * 1028.0 * 10-12.2 * 1013.1 * 1048.4 * 105
Rn-222 (a)Radon (86)3.0 * 10-18.14.0 * 10-31.1 * 10-15.7 * 1031.5 * 105
Ru-97Ruthenium (44)5.01.4 * 1025.01.4 * 1021.7 * 1044.6 * 105
Ru-103 (a)2.05.4 * 1012.05.4 * 1011.2 * 1033.2 * 104
Ru-1051.02.7 * 1016.0 * 10-11.6 * 1012.5 * 1056.7 * 106
Ru-106 (a)2.0 * 10-15.42.0 * 10-15.41.2 * 1023.3 * 103
S-35Sulphur (16)4.0 * 1011.1 * 1033.08.1 * 1011.6 * 1034.3 * 104
Sb-122Antimony (51)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1011.5 * 1044.0 * 105
Sb-1246.0 * 10-11.6 * 1016.0 * 10-11.6 * 1016.5 * 1021.7 * 104
Sb-1252.05.4 * 1011.02.7 * 1013.9 * 1011.0 * 103
Sb-1264.0 * 10-11.1 * 1014.0 * 10-11.1 * 1013.1 * 1038.4 * 104
Sc-44Scandium (21)5.0 * 10-11.4 * 1015.0 * 10-11.4 * 1016.7 * 1051.8 * 107
Sc-465.0 * 10-11.4 * 1015.0 * 10-11.4 * 1011.3 * 1033.4 * 104
Sc-471.0 * 1012.7 * 1027.0 * 10-11.9 * 1013.1 * 1048.3 * 105
Sc-483.0 * 10-18.13.0 * 10-18.15.5 * 1041.5 * 106
Se-75Selenium (34)3.08.1 * 1013.08.1 * 1015.4 * 1021.5 * 104
Se-794.0 * 1011.1 * 1032.05.4 * 1012.6 * 10-37.0 * 10-2
Si-31Silicon (14)6.0 * 10-11.6 * 1016.0 * 10-11.6 * 1011.4 * 1063.9 * 107
Si-324.0 * 1011.1 * 1035.0 * 10-11.4 * 1013.91.1 * 102
Sm-145Samarium (62)1.0 * 1012.7 * 1021.0 * 1012.7 * 1029.8 * 1012.6 * 103
Sm-147UnlimitedUnlimitedUnlimitedUnlimited8.5 * 10-102.3 * 10-8
Sm-1514.0 * 1011.1 * 1031.0 * 1012.7 * 1029.7 * 10-12.6 * 101
Sm-1539.02.4 * 1026.0 * 10-11.6 * 1011.6 * 1044.4 * 105
Sn-113 (a)Tin (50)4.01.1 * 1022.05.4 * 1013.7 * 1021.0 * 104
Sn-117m7.01.9 * 1024.0 * 10-11.1 * 1013.0 * 1038.2 * 104
Sn-119m4.0 * 1011.1 * 1033.0 * 1018.1 * 1021.4 * 1023.7 * 103
Sn-121m (a)4.0 * 1011.1 * 1039.0 * 10-12.4 * 1012.05.4 * 101
Sn-1238.0 * 10-12.2 * 1016.0 * 10-11.6 * 1013.0 * 1028.2 * 103
Sn-1254.0 * 10-11.1 * 1014.0 * 10-11.1 * 1014.0 * 1031.1 * 105
Sn-126 (a)6.0 * 10-11.6 * 1014.0 * 10-11.1 * 1011.0 * 10-32.8 * 10-2
Sr-82 (a)Strontium (38)2.0 * 10-15.42.0 * 10-15.42.3 * 1036.2 * 104
Sr-852.05.4 * 1012.05.4 * 1018.8 * 1022.4 * 104
Sr-85m5.01.4 * 1025.01.4 * 1021.2 * 1063.3 * 107
Sr-87m3.08.1 * 1013.08.1 * 1014.8 * 1051.3 * 107
Sr-896.0 * 10-11.6 * 1016.0 * 10-11.6 * 1011.1 * 1032.9 * 104
Sr-90 (a)3.0 * 10-18.13.0 * 10-18.15.11.4 * 102
Sr-91 (a)3.0 * 10-18.13.0 * 10-18.11.3 * 1053.6 * 106
Sr-92 (a)1.02.7 * 1013.0 * 10-18.14.7 * 1051.3 * 107
T(H-3)Tritium (1)4.0 * 1011.1 * 1034.0 * 1011.1 * 1033.6 * 1029.7 * 103
Ta-178 (long-lived)Tantalum (73)1.02.7 * 1018.0 * 10-12.2 * 1014.2 * 1061.1 * 108
Ta-1793.0 * 1018.1 * 1023.0 * 1018.1 * 1024.1 * 1011.1 * 103
Ta-1829.0 * 10-12.4 * 1015.0 * 10-11.4 * 1012.3 * 1026.2 * 103
Tb-157Terbium (65)4.0 * 1011.1 * 1034.0 * 1011.1 * 1035.6 * 10-11.5 * 101
Tb-1581.02.7 * 1011.02.7 * 1015.6 * 10-11.5 * 101
Tb-1601.02.7 * 1016.0 * 10-11.6 * 1014.2 * 1021.1 * 104
Tc-95m (a)Technetium (43)2.05.4 * 1012.05.4 * 1018.3 * 1022.2 * 104
Tc-964.0 * 10-11.1 * 1014.0 * 10-11.1 * 1011.2 * 1043.2 * 105
Tc-96m (a)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1011.4 * 1063.8 * 107
Tc-97UnlimitedUnlimitedUnlimitedUnlimited5.2 * 10-51.4 * 10-3
Tc-97m4.0 * 1011.1 * 1031.02.7 * 1015.6 * 1021.5 * 104
Tc-988.0 * 10-12.2 * 1017.0 * 10-11.9 * 1013.2 * 10-58.7 * 10-4
Tc-994.0 * 1011.1 * 1039.0 * 10-12.4 * 1016.3 * 10-41.7 * 10-2
Tc-99m1.0 * 1012.7 * 1024.01.1 * 1021.9 * 1055.3 * 106
Te-121Tellurium (52)2.05.4 * 1012.05.4 * 1012.4 * 1036.4 * 104
Te-121m5.01.4 * 1023.08.1 * 1012.6 * 1027.0 * 103
Te-123m8.02.2 * 1021.02.7 * 1013.3 * 1028.9 * 103
Te-125m2.0 * 1015.4 * 1029.0 * 10-12.4 * 1016.7 * 1021.8 * 104
Te-1272.0 * 1015.4 * 1027.0 * 10-11.9 * 1019.8 * 1042.6 * 106
Te-127m (a)2.0 * 1015.4 * 1025.0 * 10-11.4 * 1013.5 * 1029.4 * 103
Te-1297.0 * 10-11.9 * 1016.0 * 10-11.6 * 1017.7 * 1052.1 * 107
Te-129m (a)8.0 * 10-12.2 * 1014.0 * 10-11.1 * 1011.1 * 1033.0 * 104
Te-131m (a)7.0 * 10-11.9 * 1015.0 * 10-11.4 * 1013.0 * 1048.0 * 105
Te-132 (a)5.0 * 10-11.4 * 1014.0 * 10-11.1 * 1011.1 * 1043.0 * 105
Th-227Thorium (90)1.0 * 1012.7 * 1025.0 * 10-31.4 * 10-11.1 * 1033.1 * 104
Th-228 (a)5.0 * 10-11.4 * 1011.0 * 10-32.7 * 10-23.0 * 1018.2 * 102
Th-2295.01.4 * 1025.0 * 10-41.4 * 10-27.9 * 10-32.1 * 10-1
Th-2301.0 * 1012.7 * 1021.0 * 10-32.7 * 10-27.6 * 10-42.1 * 10-2
Th-2314.0 * 1011.1 * 1032.0 * 10-25.4 * 10-12.0 * 1045.3 * 105
Th-232UnlimitedUnlimitedUnlimitedUnlimited4.0 * 10-91.1 * 10-7
Th-234 (a)3.0 * 10-18.13.0 * 10-18.18.6 * 1022.3 * 104
Th(nat)UnlimitedUnlimitedUnlimitedUnlimited8.1 * 10-92.2 * 10-7
Ti-44 (a)Titanium (22)5.0 * 10-11.4 * 1014.0 * 10-11.1 * 1016.41.7 * 102
Tl-200Thallium (81)9.0 * 10-12.4 * 1019.0 * 10-12.4 * 1012.2 * 1046.0 * 105
Tl-2011.0 * 1012.7 * 1024.01.1 * 1027.9 * 1032.1 * 105
Tl-2022.05.4 * 1012.05.4 * 1012.0 * 1035.3 * 104
Tl-2041.0 * 1012.7 * 1027.0 * 10-11.9 * 1011.7 * 1014.6 * 102
Tm-167Thulium (69)7.01.9 * 1028.0 * 10-12.2 * 1013.1 * 1038.5 * 104
Tm-1703.08.1 * 1016.0 * 10-11.6 * 1012.2 * 1026.0 * 103
Tm-1714.0 * 1011.1 * 1034.0 * 1011.1 * 1034.0 * 1011.1 * 103
U-230 (fast lung absorption) (a)(d)Uranium (92)4.0 * 1011.1 * 1031.0 * 10-12.71.0 * 1032.7 * 104
U-230 (medium lung absorption) (a)(e)4.0 * 1011.1 * 1034.0 * 10-31.1 * 10-11.0 * 1032.7 * 104
U-230 (slow lung absorption) (a)(f)3.0 * 1018.1 * 1023.0 * 10-38.1 * 10-21.0 * 1032.7 * 104
U-232 (fast lung absorption) (d)4.0 * 1011.1 * 1031.0 * 10-22.7 * 10-18.3 * 10-12.2 * 101
U-232 (medium lung absorption) (e)4.0 * 1011.1 * 1037.0 * 10-31.9 * 10-18.3 * 10-12.2 * 101
U-232 (slow lung absorption) (f)1.0 * 1012.7 * 1021.0 * 10-32.7 * 10-28.3 * 10-12.2 * 101
U-233 (fast lung absorption) (d)4.0 * 1011.1 * 1039.0 * 10-22.43.6 * 10-49.7 * 10-3
U-233 (medium lung absorption) (e)4.0 * 1011.1 * 1032.0 * 10-25.4 * 10-13.6 * 10-49.7 * 10-3
U-233 (slow lung absorption) (f)4.0 * 1011.1 * 1036.0 * 10-31.6 * 10-13.6 * 10-49.7 * 10-3
U-234 (fast lung absorption) (d)4.0 * 1011.1 * 1039.0 * 10-22.42.3 * 10-46.2 * 10-3
U-234 (medium lung absorption) (e)4.0 * 1011.1 * 1032.0 * 10-25.4 * 10-12.3 * 10-46.2 * 10-3
U-234 (slow lung absorption) (f)4.0 * 1011.1 * 1036.0 * 10-31.6 * 10-12.3 * 10-46.2 * 10-3
U-235 (all lung absorption types) (a),(d),(e),(f)UnlimitedUnlimitedUnlimitedUnlimited8.0 * 10-82.2 * 10-6
U-236 (fast lung absorption) (d)UnlimitedUnlimitedUnlimitedUnlimited2.4 * 10-66.5 * 10-5
U-236 (medium lung absorption) (e)4.0 * 1011.1 * 1032.0 * 10-25.4 * 10-12.4 * 10-66.5 * 10-5
U-236 (slow lung absorption) (f)4.0 * 1011.1 * 1036.0 * 10-31.6 * 10-12.4 * 10-66.5 * 10-5
U-238 (all lung absorption types) (d),(e),(f)UnlimitedUnlimitedUnlimitedUnlimited1.2 * 10-83.4 * 10-7
U (nat)UnlimitedUnlimitedUnlimitedUnlimited2.6 * 10-87.1 * 10-7
U (enriched to 20% or less)(g)UnlimitedUnlimitedUnlimitedUnlimitedsee § 173.434 see § 173.434
U (dep)UnlimitedUnlimitedUnlimitedUnlimitedsee § 173.434 see § 173.434
V-48Vanadium (23)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1016.3 * 1031.7 * 105
V-494.0 * 1011.1 * 1034.0 * 1011.1 * 1033.0 * 1028.1 * 103
W-178 (a)Tungsten (74)9.02.4 * 1025.01.4 * 1021.3 * 1033.4 * 104
W-1813.0 * 1018.1 * 1023.0 * 1018.1 * 1022.2 * 1026.0 * 103
W-1854.0 * 1011.1 * 1038.0 * 10-12.2 * 1013.5 * 1029.4 * 103
W-1872.05.4 * 1016.0 * 10-11.6 * 1012.6 * 1047.0 * 105
W-188 (a)4.0 * 10-11.1 * 1013.0 * 10-18.13.7 * 1021.0 * 104
Xe-122 (a)Xenon (54)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1014.8 * 1041.3 * 106
Xe-1232.05.4 * 1017.0 * 10-11.9 * 1014.4 * 1051.2 * 107
Xe-1274.01.1 * 1022.05.4 * 1011.0 * 1032.8 * 104
Xe-131m4.0 * 1011.1 * 1034.0 * 1011.1 * 1033.1 * 1038.4 * 104
Xe-1332.0 * 1015.4 * 1021.0 * 1012.7 * 1026.9 * 1031.9 * 105
Xe-1353.08.1 * 1012.05.4 * 1019.5 * 1042.6 * 106
Y-87 (a)Yttrium (39)1.02.7 * 1011.02.7 * 1011.7 * 1044.5 * 105
Y-884.0 * 10-11.1 * 1014.0 * 10-11.1 * 1015.2 * 1021.4 * 104
Y-903.0 * 10-18.13.0 * 10-18.12.0 * 1045.4 * 105
Y-916.0 * 10-11.6 * 1016.0 * 10-11.6 * 1019.1 * 1022.5 * 104
Y-91m2.05.4 * 1012.05.4 * 1011.5 * 1064.2 * 107
Y-922.0 * 10-15.42.0 * 10-15.43.6 * 1059.6 * 106
Y-933.0 * 10-18.13.0 * 10-18.11.2 * 1053.3 * 106
Yb-169Ytterbium (70)4.01.1 * 1021.02.7 * 1018.9 * 1022.4 * 104
Yb-1753.0 * 1018.1 * 1029.0 * 10-12.4 * 1016.6 * 1031.8 * 105
Zn-65Zinc (30)2.05.4 * 1012.05.4 * 1013.0 * 1028.2 * 103
Zn-693.08.1 * 1016.0 * 10-11.6 * 1011.8 * 1064.9 * 107
Zn-69m (a)3.08.1 * 1016.0 * 10-11.6 * 1011.2 * 1053.3 * 106
Zr-88Zirconium (40)3.08.1 * 1013.08.1 * 1016.6 * 1021.8 * 104
Zr-93UnlimitedUnlimitedUnlimitedUnlimited9.3 * 10-52.5 * 10-3
Zr-95 (a)2.05.4 * 1018.0 * 10-12.2 * 1017.9 * 1022.1 * 104
Zr-97 (a)4.0 * 10-11.1 * 1014.0 * 10-11.1 * 1017.1 * 1041.9 * 106

aA1 and/or A2 values for these parent radionuclides include contributions from daughter nuclides with half-lives less than 10 days as listed in footnote (a) to Table 2 in the "IAEA Regulations for the Safe Transport of Radioactive Material, SSR-6" (IBR, see § 171.7 of this subchapter).

b The values of A1 and A2 in curies (Ci) are approximate and for information only; the regulatory standard units are Terabecquerels (TBq), (see § 171.10 ).

c The activity of Ir-192 in special form may be determined from a measurement of the rate of decay or a measurement of the radiation level at a prescribed distance from the source.

d These values apply only to compounds of uranium that take the chemical form of UF6, UO2F2 and UO2(NO3)2 in both normal and accident conditions of transport.

e These values apply only to compounds of uranium that take the chemical form of UO3, UF4, UCl4 and hexavalent compounds in both normal and accident conditions of transport.

f These values apply to all compounds of uranium other than those specified in notes (d) and (e) of this table.

g These values apply to unirradiated uranium only.

h [Reserved]

i A2 = 0.74 TBq (20 Ci) for Mo-99 for domestic use.

49 C.F.R. §173.435

69 FR 3678 , Jan. 26, 2004; 69 FR 55119 , Sept. 13, 2004, as amended at 71 FR 54395 , Sept. 14, 2006; 77 FR 60942 , Oct. 5, 2012; 79 FR 40615 , July 11, 2014; 80 FR 1163 , Jan. 8, 2015; 85 FR 83401 , Dec. 21, 2020
85 FR 83401 , 1/20/2021