| Ia - In | Nummer |
| Iberis amara | 14 |
| Iboga | 14 / # 227 ++ |
| Ibogain | 14 / # 128 Wirkung |
| Ibotensäure | 14 |
| Ibuprofen | xxx |
| ICI 42464 | xxx |
| 3-Icosyl-4-henicosyliden-oxetan-2-on | 16 |
| Ifosfamid | 14 / 18 / 19 / # (19c) |
| Ilex aquifolium | 16 / # 227 ++ |
| Ilex paraguariensis | 14 / # 227 (+) |
| Imazalil | xxx |
| Imazamox | 16 |
| Imazapyr | 14 / 18 |
| Imidacloprid | 16 / 18 |
| Imidazol | 2 / # (19b) |
| 2-Imidazolidinon | 16 / # (19b) |
| Imidazolidin-2-thion | 14 / selten 18 / # (19a+b) |
| Imidazoliniumsalz | 16 |
| 3-(4-Imidazolyl)-acrylsäure | |
| Imidazotriazinon | |
| Imidoxim | |
| 1,1’-Imino-bis-(octamethylen)-di-guanidin | 14 / # 6 Augen |
| 4,4’-(4-Imino-cyclohexa-2,5-dienyl-idenmethylen)-di-anilin- hydrochlorid |
14 / 19a |
| 2,2-Imino-di-ethanol | 16 / 18 / 19 /
# 6 Augen / # (19a) / Über MAK 19b / # 21 Haut / # 77 Reaktion |
| Gemisch aus : 2,2-Imino-diethanol-6-methyl-2-(4-(2,4,6-tri- amino-pyrimidin-5-ylazo)-phenyl-benzo-thiazol-7-sulfonat UND N,N-Diethyl-propan-1,3-diamin-6-methyl-2-(4-(2,4,6- tri-amino-pyrimidin-5-ylazo)phenyl)-benzothiazol-7-sulfonat |
16 / selten 18 |
| 1,1’-Imino-di-propan-2-ol | 16 |
| 3,3’-Imino-di-(propylamin) | 2 / 18 |
| 2-Imino-5-phenyl-4-oxazolidinon | 14 |
| Imipramin »Online!« | xxx |
| Imiprothrin | 16 |
| Immergrün, Kleines | |
| Impatiens balsamina | 18 / # 227 (+) |
| Imperatorin | 14 / # 14 Eigenschaften |
| Imperialin | 14 |
| Impfstoffe | xxx |
| Indapamid | xxx |
| Inden | 16 |
| Indeno-[1,2,3-cd]-pyren | 19a |
| Indianer-Tabak | 14 / # 227 ++ |
| Indigo | 16 |
| Indigo, Wilder | |
| Indigotin I | |
| Indium | xxx |
| Indium, Pulver | 12 |
| Indiumphosphid | 12 / 19a |
| Indium-Verbindungen | 12 |
| Indol | 16 |
| Indol-3-aldehyd | |
| Indol-3-carbaldehyd | |
| Indol-2,3-dion | |
| Indol-3-essigsäure | |
| 2-Indolinon | |
| 3-Indolylacetat | |
| 4-(3-Indolyl)-buttersäure | 14 |
| 3-Indolyl-glyoxylchlorid | |
| 2-(3-Indolyl)-triethylamin | |
| Indometacin | 14 / 3 / 18 / # (19b) |
| Indoprofen | xxx |
| Indoramin | xxx |
| Indoxacarb | 16 / 18 |
| Indoxylacetat | 16 |
| Indoxylsulfat Kaliumsalz | |
| Industrieruße | # (19a) |
| Ingwer | 16 / # 227 (+) |
| Inkalilie | 18 |
| Inocybe-Arten | 14 / # 227 ++ |
| Inosinsäure | 16 |
| Inositolnicotinat | xxx |
| Inproquon | 16 / 13 |
| Insektenblume, Dalmatinische | 14 / 18 / # 227 (+) |
| Insulin | xxx |
| Inula helenium | 18 |