| Agent Name | Agent Number | CAS Number | Last Updated | |
|---|---|---|---|---|
| 3TC | 3958 | 134680-32-3 | 08/29/2025 | Summary |
| 4-(DIMETHYLAMINO)BENZALDEHYDE | 3851 | 100-10-7 | 08/07/2025 | Summary |
| 4-ACETYLAMINOFLUORENE | 2604 | 28322-02-3 | 05/16/2025 | Summary |
| 4-AMINOANTIPYRINE | 3480 | 83-07-8 | 07/29/2025 | Summary |
| 4-AMINOBIPHENYL | 3088 | 92-67-1 | 08/21/2025 | Summary |
| 4-AMINOCLONIDINE | 2845 | 66711-21-5 | 07/26/2025 | Summary |
| 4-AMINODIPHENYLAMINE | 3317 | 101-54-2 | 10/24/2025 | Summary |
| 4-AMINODIPHENYLAMINE | 3317 | 101-54-2 | 10/24/2025 | Summary |
| 4-AMINOPHENAZONE | 3480 | 83-07-8 | 07/29/2025 | Summary |
| 4-AMINOPYRIDINE | 4531 | 504-24-5 | 12/09/2025 | Summary |
| 4-BIPHENYLAMINE | 3088 | 92-67-1 | 08/21/2025 | Summary |
| 4-BROMOBIPHENYL | 4193 | 92-66-0 | 07/24/2025 | Summary |
| 4-BROMOPYRIDINE | 3305 | 1120-87-2 | 02/27/2026 | Summary |
| 4-BUTYROLACTONE | 2228 | 96-48-0 | 12/31/2025 | Summary |
| 4-COUMARINOL | 4194 | 1076-38-6 | 07/24/2025 | Summary |