| Thio [ h - z ] | Nummer |
| Thio-harnstoff | 14 / 18 / # (19a+b) / # 32 Photo |
| 2-Thio-hydantoin | 14 |
| Thio-hypoxanthin | 16 / # (19c) |
| 6-Thio-inosin | 16 |
| Thio-kohlensäure-di-hydrazid | 14 |
| 4-Thio-kresol | 2 / # 123 Geruch |
| Thiolan | 16 /
Über MAK 19b / # 21 Haut |
| Thio-mersal | 14 / 10 / stark 18 / # (19a) |
| Thio-meton | 4 / 18 / # (19c) |
| Thio-milchsäure | 2 / # 40 Tränen |
| Thio-morpholin | 14 / 2 |
| Thio-2-naphthol | 16 |
| Thionazin | 14 / 4 / 18 |
| Thionin | 16 |
| Thionyl-anilin | 14 / 13 / 18 |
| Thionyl-bromid | 14 |
| Thionyl-chlorid | 2 / # 40 Tränen |
| Thionyl-chlorid Reaktionsprodukte | 16 / 18 |
| Thionyl-di-chlorid | 2 / # 40 Tränen |
| Thio-pental | xxx |
| Thio-pental-Natrium | 17 |
| Thio-phanat | 16 |
| Thio-phanat-methyl | 16 / 18 / # (19c) |
| Thiophen | 10 / # 123 Geruch |
| Thiophen-aceto-nitril | 7 / 16 |
| Thiophen-2-acetyl-chlorid | 11 / 19 |
| Thiophen-2-carbaldehyd | 16 / 19 |
| Thiophen-carbonsäure-2-chlorid | 2 |
| Thiophen-carbonsäure-hydrazid | |
| Thiophen-2-essigsäure | |
| Thiophen-3-essigsäure | |
| Thio-phenol | 7 / 16 |
| Thio-phenol Kupfer-(I)-salz | 2 |
| Thio-phenol Natriumsalz | 2 / # 174 Übel |
| Thiophen-2-sulfonyl-chlorid | 11 |
| Thio-phosgen | |
| Thio-phosphorsäure-ester | 4 / 16 |
| Thio-phosphorsäure-O-ethylester-di-chlorid | 2 / 4 |
| Thio-phosphorsäure-O,O,O-tri-ethylester | 4 / 16 |
| Thio-phosphoryl-bromid | 11 |
| Thio-phosphoryl-chlorid | 11 / 4 |
| Thio-poran | xxx |
| Thio-ridazin | 14 |
| 2-Thio-salicylsäure | 16 |
| Thio-semi-carbazid | 14 |
| Thio-sinamin | |
| Thio - T E P A | 11 / 18 / 19 / # (19a+c) |
| 2-Thio-uracil | 14 / # (19a) |
| 1,4-Thioxan | 14 / # 123 Geruch |
| 2-Thioxo-thia-zolidin-4-on | 16 |