| No. | Chemical Name | Cas No. | Formula | Mol. Wt. | Category |
| A0163 | Tamoxifen | 10540-29-1 | C26H29NO | 371.5 | Med |
| A0197 | Tebufenozide | 112410-23-8 | C22H28N2O2 | 352.48 | Pest |
| A0008 | m-Terphenyl | 92-06-8 | C6H4(C6H5)2 | 230.31 | Ind |
| A0007 | o-Terphenyl | 84-15-1 | C6H4(C6H5)2 | 230.31 | Ind |
| A0009 | p-Terphenyl | 92-94-4 | C18H14 | 230.3 | Ind |
| A0105 | Testosterone | 58-22-0 | C19H28O2 | 288.42 | Nat |
| A0138 | Tetrabromobisphenol A | 79-94-7 | (CH3)2C(C6H2Br2OH)2 | 543.88 | Ind |
| A0279 | 3,3',5,5'-Tetrachlorobisphenol A | Synthesis | C15H12O2Cl4 | 366 | Ind |
| A0139 | Tetrachlorobisphenol A | 79-95-8 | (CH3)2C(C6H2Cl2OH)2 | 366.07 | Ind |
| A0261 | 3,3',5,5'-Tetraiodothyronine | 51-48-9 | C15H11I4NO4 | 776.9 | Nat |
| A0039 | TetramethylbisphenolA | 5613-46-7 | (HOC6H2(CH3)2)2C(CH3)2 | 284.39 | Ind |
| A0171 | Thiobencarb | 28249-77-6 | C12H16ClNOS | 257.78 | Pest |
| A0040 | 4,4'-Thiodiphenol | 2664-63-3 | HOC6H4SC6H4OH | 218.28 | Ind |
| A0098 | Toxaphene | 8001-35-2 | C10H10Cl8 | 413.81 | Pest |
| A0209 | Tralomethrin | 66841-25-6 | C22H19Br4NO3 | 665.01 | Pest |
| A0288 | 3,6,8-Tribromoharman | Synthesis | C12H7N2Br3 | 419 | Ind |
| A0080 | Tributyltin(IV)chloride | 1461-22-9 | C12H27ClSn | 325.51 | Org-met |
| A0278 | 3,3',5-Trichlorobisphenol A | Synthesis | C15H13O2Cl3 | 331.5 | Ind |
| A0069 | 2,4,5-Trichlorophenoxyacetic Acid | 93-76-5 | C8H5Cl3O3 | 255.48 | Pest |
| A0182 | Trifluralin | 1582-09-8 | C13H16F3N3O4 | 335.28 | Pest |
| A0112 | 4',5,7-Trihydroxyflavanone | 67604-48-2 | C15H12O5 | 272.3 | Nat |
| A0260 | 3,5,3'-Triiodothyronine | 6893-02-3 | C15H12I3NO4 | 651.01 | Nat |
| A0081 | Triphenyltin(IV)chloride | 639-58-7 | C18H15ClSn | 385.48 | Org-met |