| Naics index | Naics index description |
|---|---|
| 325180 | Potassium salts manufacturing |
| 325180 | Potassium sulfate manufacturing |
| 325180 | Radioactive elements manufacturing |
| 325180 | Radioactive isotopes manufacturing |
| 325180 | Radium chloride manufacturing |
| 325180 | Radium luminous compounds manufacturing |
| 325180 | Rare earth compounds, not specified elsewhere by process, manufacturing |
| 325180 | Rare earth salts manufacturing |
| 325180 | Sal soda (i.e., washing soda) manufacturing |
| 325180 | Selenium compounds, not specified elsewhere by process, manufacturing |