| Naics index | Naics index description |
|---|---|
| 325180 | Hydrazine manufacturing |
| 325180 | Hydrochloric acid manufacturing |
| 325180 | Hydrocyanic acid manufacturing |
| 325180 | Hydrofluoric acid manufacturing |
| 325180 | Hydrofluosilicic acid manufacturing |
| 325180 | Hydrogen peroxide manufacturing |
| 325180 | Hydrogen sulfide manufacturing |
| 325180 | Hydrosulfites manufacturing |
| 325180 | Hypochlorites manufacturing |
| 325180 | Hypophosphites manufacturing |