| Agent Name | Agent Number | CAS Number | Last Updated | |
|---|---|---|---|---|
| HYDROGEN CYANIDE | 1292 | 74-90-8 | 02/27/2026 | Summary |
| HYDROGEN FLUORIDE | 1445 | 7664-39-3 | 07/19/2025 | Summary |
| HYDROGEN IODIDE | 3736 | 10034-85-2 | 10/31/2025 | Summary |
| HYDROGEN PEROXIDE | 1645 | 7722-84-1 | 09/24/2025 | Summary |
| HYDROGEN PHOSPHIDE | 1963 | 7803-51-2 | 11/13/2025 | Summary |
| HYDROGEN SULFIDE | 1599 | 7783-06-4 | 11/08/2025 | Summary |
| HYDROGEN SULFITE | 1969 | 15181-46-1 | 01/28/2026 | Summary |
| HYDROGEN TETRAFLUOROBORATE | 2815 | 16872-11-0 | 03/13/2026 | Summary |
| HYDROGEN WATER | 4922 | NONE | 03/20/2026 | Summary |
| HYDROGEN-RICH SALINE | 4922 | NONE | 03/20/2026 | Summary |
| HYDROGEN-RICH WATER | 4922 | NONE | 03/20/2026 | Summary |
| HYDROGENOPHAGA PSEUDOFLAVA | 4515 | NONE | 12/09/2025 | Summary |
| HYDROGESIC | 2821 | 330988-71-1 | 10/22/2025 | Summary |
| HYDROIODIC ACID | 3736 | 10034-85-2 | 10/31/2025 | Summary |
| HYDROMETHYLNON | 3615 | 67485-29-4 | 10/30/2025 | Summary |