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The serial number for each source has a two- or three-digit prefix that is associated with a special form certificate (as shown in the table below). For example, a source with serial number 75-2345 (prefix 75) is associated with special form certificate USA/0614/S-96.
The special form certificates are available in Adobe Acrobat 3.0 format.
Some of the values in the Source Serial Number Prefix column flagged with an asterisk (*) may no longer be considered special form materials. Visit the Special Gauge Shipping page for more information.
Source Serial Number Prefix
Nuclide
Activity mCi
Special Form Certificate
Expiration Date
View
CC*
Cs-137
8
USA/0673/S-96 Revision 4 (replaces GB/140/S)
8/31/2023
view
CA*
Am-241
40
USA/0632/S-96 Revision 9 (replaces GB/7/S)
8/31/2022
CAA*
40*
45*
10
USA/0659/S-96 Revision 5 (replaces GB/029/S)
4/30/2023
46
USA/0263/S-96 Revision 6
8/31/2021
47*
50
52
5
USA/0767/S-96 Revision 2
54
100
USA/0043/S-96 Revision 14
11/30/2021
55*
USA/0620/S-96 Revision 4 (replaces GB/149/S)
57
74
Cf-252
0.1
USA/0356/S-96 Revision 14
06/30/2024
75*
USA/0614/S-96 Revision 4 (replaces GB/0353/S)
4/30/2022
76
0.06
77
78
CZ/1009/S-96 Revision 2
11/30/2023
82
Co-60
USA/0502/S-96 Revision 12 (replaces GB/193/S)
3/31/2023
98
USA/0733/S-96 Revision (replaces GB/145/S-96)
08/29/2025
470
USA/0462/S-96 Revision 8
550
570
750
751
752
837
0.09
USA/0517/S-96 Revision 4
1/1/2021
* Visit the Special Gauge Shipping page for more information.