| No. | Chemical Name | Cas No. | Formula | Mol. Wt. | Category |
| A0099 | Daidzein | 486-66-8 | C15H10O4 | 254.24 | Nat |
| A0115 | Daidzin | 552-66-9 | C21H20O9 | 416.38 | Nat |
| A0023 | Dazomet | 533-74-4 | C5H10N2S2 | 162.28 | Pest |
| A0094 | o,p'-DDD | 53-19-0 | C14H10Cl4 | 320.05 | Pest |
| A0095 | p,p'-DDD | 72-54-8 | C14H10Cl4 | 320.05 | Pest |
| A0096 | o,p'-DDE | 3424-82-6 | C14H8Cl4 | 318.03 | Pest |
| A0097 | p,p'-DDE | 72-55-9 | C14H8Cl4 | 318.03 | Pest |
| A0129 | o,p'-DDT | 789-02-6 | C14H9Cl5 | 354.49 | Pest |
| A0130 | p,p'-DDT | 50-29-3 | C14H9Cl5 | 354.49 | Pest |
| A0290 | Dehydroabietic acid | 1740-19-8 | C20H28O2 | 300.44 | Nat |
| A0061 | Di-2-ethylhexyl adipate (DOA) | 103-23-1 | C22H42O4 | 370.57 | Ind |
| A0092 | Di-2-Ethylhexyl phthalate | 117-81-7 | C6H4(COOC8H17)2 | 390.56 | Ind |
| A0013 | Diazinon oxon | 962-58-3 | C12H21N2O4P | 288.28 | Pest |
| A0238 | 1,2:5,6-Dibenzanthracene | 53-70-3 | C22H14 | 278.35 | Ind |
| A0028 | Dibenzyl | 103-29-7 | C14H14 | 182.26 | Ind |
| A0073 | 1,2-Dibromo-3-chloropropane (DBCP) | 96-12-8 | C3H5Br2Cl | 236.33 | Pest |
| A0287 | 6,8-Dibromoharman | 1601-98-5 | C12H8N2Br2 | 340 | Ind |
| A0245 | Dibutyltin(IV)Dichloride | 683-18-1 | (CH3(CH2)3)2SnCl2 | 303.84 | Org-met |
| A0281 | 2,6-Dichloro-4-nonylphenol | Synthesis | C15H22OCl2 | 289 | Ind |
| A0285 | 2,6-Dichloro-4-nonylphenyl 2-hydroxyethyl ether | Synthesis | C17H26O2Cl2 | 333 | Ind |
| A0276 | 3,3'-Dichlorobisphenol A | Synthesis | C15H14O2Cl2 | 297 | Ind |
| A0277 | 3,5-Dichlorobisphenol A | Synthesis | C15H14O2Cl2 | 297 | Ind |
| A0060 | 2,4-Dichlorophenol | 120-83-2 | Cl2C6H3OH | 163 | Ind |
| A0223 | 3,4-Dichlorophenol | 95-77-2 | Cl2C6H3OH | 163 | Ind |
| A0175 | (2,4-Dichlorophenoxy)acetic acid | 94-75-7 | C8H6Cl2O3 | 221.04 | Pest |
| A0022 | 1,3-Dichloropropene | 542-75-6 | ClCH2CH:CHCl | 110.97 | Pest |
| A0084 | Dicyclohexyl Phthalate | 84-61-7 | C20H26O4 | 330.42 | Ind |
| A0128 | Dieldrin | 60-57-1 | C12H8Cl6O | 380.91 | Pest |
| A0032 | Dienestrol | 84-17-3 | C18H18O2 | 266.33 | Med |
| A0085 | Diethyl Phthalate | 84-66-2 | C12H14O4 | 222.24 | Ind |
| A0059 | Diethylstilbestrol (DES) | 56-53-1 | C18H20O2 | 268.4 | Med |
| A0262 | 3,5-Diiodo-L(+)-tyrosine dihydrate | 300-39-0 | C9H9I2NO3 | 433 | Nat |
| A0173 | Dimethametryn | 22936-75-0 | C11H21N5S | 255.4 | Pest |
| A0219 | Dimethylaminoethyl methacrylic acid | 2867-47-2 | CH2:C(CH3)COOCH2CH2N(CH3)2 | 157.21 | Med |
| A0220 | Dimetyl-p-toluidine | 99-97-8 | CH3C6H4N(CH3)2 | 135.21 | Med |
| A0083 | Di-n-butyl Phthalate | 84-74-2 | C16H22O4 | 278.34 | Ind |
| A0091 | Di-n-Hexyl phthalate | 84-75-3 | C20H30O4 | 334.5 | Ind |
| A0090 | Di-n-Pentyl phthalate | 131-18-0 | C18H26O4 | 306.4 | Ind |
| A0089 | Di-n-Propyl phthalate | 131-16-8 | C14H18O4 | 250.3 | Ind |
| A0019 | Diuron(DCMU) | 330-54-1 | C9H10Cl2N2O | 233.1 | Pest |