| Agent Name | Agent Number | CAS Number | Last Updated | |
|---|---|---|---|---|
| HAW | 2187 | NONE | 12/31/2025 | Summary |
| HAWTHORN | 2187 | NONE | 12/31/2025 | Summary |
| HAZARDOUS WASTE SITES | 3047 | NONE | 11/26/2025 | Summary |
| HCFC-141b | 3752 | 1717-00-6 | 10/17/2025 | Summary |
| HCG | 2253 | 9002-61-3 | 05/16/2026 | Summary |
| HCH | 3145 | 608-73-1 | 10/23/2025 | Summary |
| HCTZ | 1102 | 58-93-5 | 05/30/2026 | Summary |
| HCV | 2818 | NONE | 05/22/2026 | Summary |
| HEALING HERB | 3105 | NONE | 05/19/2026 | Summary |
| HEART CUT DISTILLATE | 3739 | 68131-77-1 | 10/31/2025 | Summary |
| HEART-PEA | 3376 | 89958-27-0 | 02/12/2026 | Summary |
| HEAT | 1099 | NONE | 04/03/2026 | Summary |
| HEAVY STRAIGHT RUN NAPHTHA | 1474 | 64741-41-9 | 01/27/2026 | Summary |
| HEDEOMA PULEGOIDES | 2020 | NONE | 11/15/2025 | Summary |
| HEDIONDILLA | 3380 | NONE | 04/30/2026 | Summary |