| Natriun - Nib | Nummer |
| Natronbleichlauge | 11 / selten 18 / 19 |
| Natronkalk | 2 |
| Natronlauge | 2 / 19 |
| Natronwasserglas | 2 |
| Natulan | 3 / # (19c) |
| Naturgas | 19a |
| Naturgaskondensate | |
| Naturgummilatex | 18 |
| Naturstoffe | xxx |
| N B S | 16 |
| N C 7312 | 16 / # 6 Augen |
| Nebel | 6 |
| Neburon | 14 |
| Nefopam | xxx |
| Nefopam Hydrochlorid | 14 |
| Negamycin | |
| Nelkenöl | 16 / gelegentlich 18 |
| Nema | xxx |
| Nemalith | # (19a) |
| Neocuproin | 16 |
| Neodecanoylchlorid | 14 / 19 |
| Neodecansäure | 16 |
| Neodigoxin | 14 / 14a |
| Neodym-(Nd) | 12 / 16 |
| Neodymnitrat Hexahydrat | |
| Neohesperidin | 16 |
| Neohesperidin Dihydrochalcon | # (19c) |
| Neohexansäure | 16 |
| Neokupferron | |
| Neomycinsulfat | 14 / stark 18 / # 176 Anti |
| Neon | 6 |
| Neonikotin | 14 |
| Neopentan | 16 / # (19b) |
| Neopentandiamin | 16 |
| Neopentyl-alkohol | |
| Neopentyl-amin | |
| Neopentyl-bromid | |
| Neopentyl-glykol | 16 / # 6 Augen |
| Neopentyl-glykol-di-acrylat | 14 / 18 / 19 |
| Neophyl-chlorid | 16 |
| Neostigmin | 14 |
| Neostigmin-bromid | 14 / 18 |
| Neothorin | 14 / 12 / 15 / 19 |
| Nereistoxin | 14 |
| Neriifolin | 14 / 14a |
| Nerium oleander | 14 |
| Nerol | 16 |
| Nerolidol | |
| trans-Nerolidol | |
| Neroliöl | 18 |
| Neroloxid | 16 |
| Nertera granadensis | 14 |
| Nesselröschen | # 227 (+) |
| Nesselschön | # 227 + |
| Nesslers Reagenz | 14 / 12 / selten 18 / 19 / # 21 Haut |
| Netilmicin | xxx |
| Neuroleptika | xxx |
| Neurospora sitophila | 16 |
| Neutralrot | |
| Niacin | |
| Niacinamid | |
| Nialamid | xxx |
| Niaprazin | 16 |