| Sel - Sh | Nummer |
| Selen | 14 / 12 / selten 18 / 19 / # (19a+b) / Über MAK 19b |
| Selen-(IV)-chlorid | 14 / 2 / 19 |
| Selen-dioxid | 14 / 2 / 12 / 18 / 19 |
| Selen-di-sulfid | 14 / 12 / 18 / 19 |
| Selen-harnstoff | |
| Selen-hexafluorid | 5 / 12 |
| Selenicereus grandiflorus | 16 |
| Selenige Säure | 2 |
| Selenophenol | 14 / 12 / 19 |
| Selen-(IV)-oxid | 14 / 2 / 12 / 18 / 19 |
| Selensäure | 14 / 2 / 19 |
| Selen-tetra-chlorid | |
| Selen-Verbindungen | 14 / 12 / 19 / # (19a) / Über MAK 19b |
| Selen-wasserstoff | 14 / 11 / 9 / 15 / 19 / / # (19a+b) / Über MAK 19b |
| Semecarpus anacardium | 16 |
| Semicarbazid Hydrochlorid | 11 / # (19a+c) |
| Sempervirin | 14 |
| Sempervirin-nitrat | |
| Senecio-aldehyd | xxx |
| Senecio-Cruentus-Hybriden | 16 |
| Senecio jacobaea | |
| Senecionin | 14 / 9 |
| Seneciosäure | 16 |
| Seneciosäure-chlorid | 2 / # 40 Tränen |
| Seneciphyllin | 14 |
| Senf, Schwarzer | 16 |
| Senfgas | 14 / 11 / 19 / 19a / # 21 Haut / # 232-(Nat) / # 243 Info |
| Senföl | 14 / 10 / 16 / selten 18 / # (19a) / # 11 Haut |
| Senkirkin | 14 / 9 |
| Senna | 16 / 18 |
| Sennes, Ägyptische | |
| Sennidin A | 16 |
| Sennidin B | |
| Sennosid A | |
| Sennosid B | |
| cis-1-Senzoyl-4-[(4-methyl-sulfonyl)-oxy]-L-prolin | xxx |
| Sepiolith | 16 / # (19a) |
| Sequamycin | 14 / 18 |
| Sequoyit | 16 |
| Sequoyitol | |
| Sera | xxx |
| Serfin | 14 / # (19a+b) |
| L-Serin | 14 |
| L-Serin-diazo-acetat | 14 / 19a+c |
| Serotonin | 14 |
| Serotonin-creatinin-sulfat Monohydrat | 14 / # (19b) |
| Serotonin-hydrogen-maleinat | 14 |
| Serotonin-hydrogen-oxalat | |
| Serpentin | |
| Serpula lacrymans | 19 |
| Sesamex | 14 / 19 |
| Sesquiterpenlacton | 18 |
| Sethoxydim | 14 / 19 |
| Sevesogift | 14 / 9 / 18 / 19 / 19a / Über MAK 19b / # 21 Haut |
| Shiitake-Pilz | # 187 Selten |
| Shikimisäure | 14 |
| Shikimol | 10 / 18 / 19a / # (19c) |
| Showdomycin | 14 |