| Naics index | Naics index description |
|---|---|
| 325180 | Selenium dioxide manufacturing |
| 325180 | Silica gel manufacturing |
| 325180 | Silica, amorphous, manufacturing |
| 325180 | Silicofluorides manufacturing |
| 325180 | Silver bromide manufacturing |
| 325180 | Silver chloride manufacturing |
| 325180 | Silver compounds, not specified elsewhere by process, manufacturing |
| 325180 | Silver nitrate manufacturing |
| 325180 | Soda ash manufacturing |
| 325180 | Sodium aluminate manufacturing |