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 10 (replaces GB/7/S)	6/30/2027	view
CAA*	Am-241	40	USA/0632/S-96 Revision 10 (replaces GB/7/S)	6/30/2027	view
40*	Cs-137	8	USA/0673/S-96 Revision 4 (replaces GB/140/S)	8/31/2023	view
45*	Am-241	10	USA/0659/S-96 Revision 5	04/30/2023	view
46	Am-241	40	USA/0263/S-96 Revision 7	11/30/2026	view
47*	Am-241	40	USA/0632/S-96 Revision 10 (replaces GB/7/S)	6/30/2027	view
50	Cs-137	8	USA/0673/S-96 Revision 4 (replaces GB/140/S)	8/31/2023	view
52	Cs-137	5	USA/0767/S-96 Revision 2	8/31/2023	view
54	Am-241	100	USA/0043/S-96 Revision 15	11/30/2026	view
55*	Am-241	100	USA/0620/S-96 Revision 5 (replaces GB/149/S)	6/30/2027	view
57	Am-241	10	USA/0632/S-96 Revision 10 (replaces GB/7/S)	6/30/2027	view
74	Cf-252	0.1	USA/0356/S-96 Revision 14	06/30/2024	view
75*	Cs-137	8	USA/0614/S-96 Revision 5 (replaces GB/0353/S)	01/31/2027	view
76	Cf-252	0.06	USA/0356/S-96 Revision 14	06/30/2024	view
77	Cs-137	8	USA/0356/S-96 Revision 14	06/30/2024	view
78	Am-241	40	CZ/1009/S-96 Revision 2	11/30/2023	view
82	Co-60	0.06	USA/0502/S-96 Revision 12 (replaces GB/193/S)	3/31/2023	view
98	Am-241	10	USA/0733/S-96 Revision 3 (replaces GB/145/S-96)	08/29/2025	view
470	Am-241	40	USA/0462/S-96 Revision 9	08/31/2026	view
550	Am-241	40	USA/0462/S-96 Revision 9	08/31/2026	view
570	Am-241	10	CZ/1009/S-96 Revision 2	11/30/2023	view
750	Cs-137	8	USA/0614/S-96 Revision 5 (replaces GB/0353/S)	01/31/2027	view
751	Cs-137	8	USA/0614/S-96 Revision 5 (replaces GB/0353/S)	01/31/2027	view
752	Cs-137	8	USA/0614/S-96 Revision 5 (replaces GB/0353/S)	01/31/2027	view
780	Am-241	40	CZ/1009/S-96 Revision 2	11/30/2023	view
837	Cs-137	0.09	USA/0517/S-96 Revision 5	12/31/25	view

* Visit the Special Gauge Shipping page for more information.