| Agent Name | Agent Number | CAS Number | Last Updated | |
|---|---|---|---|---|
| 4-METHYLCYCLOHEXYLCARBINOL | 4542 | 34885-03-5 | 12/09/2025 | Summary |
| 4-METHYLDECANE | 3434 | 2847-72-5 | 07/10/2025 | Summary |
| 4-METHYLIMIDAZOLE | 2916 | 822-36-6 | 11/25/2025 | Summary |
| 4-METHYLPHENOL | 3211 | 106-44-5 | 01/25/2026 | Summary |
| 4-METHYLPYRAZOLE | 4100 | 7554-65-6 | 12/01/2025 | Summary |
| 4-NITRO-O-PHENYLENEDIAMINE | 3262 | 99-56-9 | 08/27/2025 | Summary |
| 4-NITROBIPHENYL | 3272 | 92-93-3 | 08/28/2025 | Summary |
| 4-NITROPHENOL | 4236 | 100-02-7 | 10/02/2025 | Summary |
| 4-NITROPHENYLOCTANOATE | 1855 | 1956-10-1 | 10/09/2025 | Summary |
| 4-NITROQUINOLINE-1-OXIDE | 3186 | 56-57-5 | 08/28/2025 | Summary |
| 4-NITROTOLUENE | 3344 | 99-99-0 | 07/08/2025 | Summary |
| 4-PHENYLCYCLOHEXENE | 3674 | 4994-16-5 | 10/02/2025 | Summary |
| 4-PHENYLENEDIAMINE | 1860 | 106-50-3 | 10/09/2025 | Summary |
| 4-PHENYLPHENOL | 2146 | 92-69-3 | 06/11/2025 | Summary |
| 4-POLYPHENOL | 2146 | 92-69-3 | 06/11/2025 | Summary |