| Naics index | Naics index description |
|---|---|
| 325194 | Naphthalene made from refined petroleum or natural gas |
| 325194 | Naphthalenesulfonic acid manufacturing |
| 325194 | Naphthenic acids made from refined petroleum or natural gas |
| 325194 | Naphthol sulfonic acids manufacturing |
| 325194 | Naphthol, alpha and beta, manufacturing |
| 325194 | Naval stores, gum or wood, manufacturing |
| 325194 | Nitrated hydrocarbon derivatives manufacturing |
| 325194 | Nitroaniline manufacturing |
| 325194 | Nitrobenzene manufacturing |
| 325194 | Nitrophenol manufacturing |