| Go - Gz | Nummer |
| Gold | 12 / 18 |
| Gold-Salze | 12 / gelegentlich 18 |
| Goldblume | 16 |
| Goldlack | 14 / # 227 ++ |
| Goldmohn | 14 |
| Goldorange, Japanische | 3a / 16 |
| Goldregen | 14 / # 227 +++ |
| Goldröschen | 7 / 16 |
| Goldrute, Echte | 18 |
| Gonaderelin | xxx |
| Gossypium herbaceum | 14 / 15 / 18 |
| Gossypol | 14 / # (19c) |
| Götterbaum | 16 / 18 |
| Grahamsches Salz | 16 |
| Gramin | |
| Granatapfelbaum | 16 / # 234 Essbar |
| Gränke | 14 / # 227 ++ |
| Grapefruitöl gepresst | # 42 Photo |
| Graphit | 16 /
Über MAK 19b / # 116 Nicht(!) |
| Graslilie | 16 |
| Gratiola officinalis | 14 / 16 / # 227 ++ |
| Gratiolon | 14 |
| Gratiosid | |
| Grayanotoxin I | |
| Grenadillholz, afrikanisches | 18 |
| Grenadillholz, westindisches | |
| Grevillea robusta | |
| Grevillol | 16 / 18 / # 76 Haut |
| Griseofulvin | 14 / # (19a+b) |
| Grossheimin | 18 |
| Grubengas | 6 |
| Grün S | # 227 H |
| Grünlilie | 16 |
| Guaiacol-glycerinether | |
| Guaiacum officinale | 14 |
| Guaifenesin | 16 |
| Guajakholzbaum | 14 |
| Guajakol | 16 |
| Guajazulen | |
| Guanethidin | 14 |
| Guanethidin-Hydrochlorid | |
| Guanidiniumchlorid | |
| Guanidin-nitrat | 16 / 13 |
| Guanidin-perchlorat | 16 |
| Guanidin-thiocyanat | 2 / 18 |
| Guanylsäure | 16 |
| Guarkernmehl | 18 |
| Guazatin | 14 / # 6 Augen |
| Gummi arabicum | 16 - # 235 Info |
| Gummi-inhalts-stoffe | 18 |
| Gundelrebe | 16 |
| Gundermann | |
| Gutta | # 227 H |
| Gymnema sylvestre | 14 |
| Gynesin | |
| Gynura scandens | |
| Gyromitra esculenta | 14 / 9 |
| Gyromitra infula | 16 |
| Gyromitrin | 14 / 9 / »Tödlich(!)« |