| Y - 20 Gifte | Nummer |
| Yagè | xxx |
| Yellow Agent | xxx |
| Ylang-Ylang-Öl | Gelegentlich 18 |
| Yohimbe | 14 |
| Yohimbin | |
| α-Yohimbin | |
| δ-Yohimbin | |
| Yohimbin-Hydrochlorid | |
| Yohimbinsäure | xxx |
| Yohimbinsäure Monohydrat | 14 |
| Ysander | # 227 + |
| Ytterbium, Pulver | 12 / 19 |
| Yttrium | 14 |
| Yttrium-(III)-carbonat Hydrat | 2 |
| Yttrium-(III)-chlorid | 11 |
| Yttrium-(III)-chlorid Hexahydrat | |
| Yttrium-(III)-nitrat-6-hydrat | 2 / 13 |