| Ta - Td | Nummer |
| 2,4,5 - T | 14 / 9 / 19 /
# 21 Haut / (19a+c) / Über AGW 19b |
| 2,4,5 - T-Salze und Ester | 14 / 9 / 19 / # (19a+c) |
| 2,4,5 - T-Butylester | |
| 2,4,5 - T-Isopropylester | |
| 2,4,5 - T-Methylester | |
| Tabak, Virginischer | # 227 +++ |
| Tabakextrakt | 14 / selten 18 / # 201 Herz |
| Tabakpflanze | 14 |
| Tabakrauch | 16 / 19a |
| Tabernanthe iboga | 16 |
| Tabun | xxx |
| Tachmalin | 14 |
| Tagetes-Erecta-Hybriden | Selten 18 |
| Tagetesöl | # 42 Photo |
| T A H T | 16 / # (19c) |
| Talcum | 11 / # (19a) / # 202 Silikose |
| Talgnitril | 7 |
| Talk | 11 / # (19a) / # 202 Silikose |
| Tallöl | 16 / 18 |
| Tallöl-fettsäuren | 16 |
| Tamarixetin | 14 |
| Tamus communis | Selten 18 |
| Tanacetum cinerariifolium | Stark 18 |
| Tanacetum parthenium | |
| Tanacetum vulgare | 16 / stark 18 |
| Tanacetyl-alkohol | 14 |
| Tannen-Bärlapp | |
| Tannin | 16 |
| Tantal | 12 / 18 |
| Tantal-(V)-chlorid | 2 / 12 |
| Tantal-hydroxid | 16 |
| Tantal-(V)-oxid | 12 / 16 / 18 |
| Tantal-pentachlorid | 2 / 12 |
| Tantal-pentoxid | 12 / 16 / 18 |
| Tarakernmehl | 16 |
| Taraxacum officinale | 16 / selten 18 |
| Taraxinsäure-1’-O-β-D-gluco-pyranosid | Stark 18 / # 120 Kontakt |
| Tartrazin | 14 / gelegentlich 18 |
| Taschenlampenbatterie | 2 / 12 |
| Taubenkropf | 16 |
| Tau-Fluvalinat | |
| Taumelkerbel | 14 |
| Taumel-Lolch | # 227 + |
| Taurin | 16 / 18 |
| Tautomycin | 14 |
| Tavor | 17 / # (19b) |
| Taxicatin | 14 |
| Taxin | 14 / 9 |
| Taxus baccata | |
| 2,3,6 - T B A | 14 / 19 |
| T B T O | 14 / 12 / 18 / 19 / Über AGW 19b / # 21 Haut / # 27 Immun |
| T C A | 16 |
| T C B C | 11 |
| T C D D | 14 / 9 / 18 / 19 / 19a / Über MAK 19b / # 21 Haut |
| T C D F | 14 / 18 / 19 / 19a |
| 2,4- / 2,6- T D I | 11 / 16 / selten 18 / 19 / # (19a) |