C.F.R. » Title 49 » CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION › SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS › PART 173—SHIPPERS—GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS › Subpart I—Class 7 (Radioactive) Materials

49 C.F.R. § 173.435

Table of A1 and A2 values for radionuclides

Read at: eCFRecfr.gov CornellLII GovInfogovinfo.gov CasesGoogle Scholar

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

Symbol of
radionuclide		Element and
atomic number		A1 (TBq)A1 (Ci) bA2 (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 × 10 15.4 × 10 2
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 × 10 01.1 × 10 22.0 × 10 05.4 × 10 14.2 × 10 41.1 × 10 6
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 × 10 16.0 × 10−11.6 × 10 11.8 × 10 44.8 × 10 5
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 § 173.434see § 173.434
U (dep)UnlimitedUnlimitedUnlimitedUnlimitedsee § 173.434see § 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
a A1 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, UO2 F2 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.
[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]