| No. | Chemical Name | Cas No. | Formula | Mol. Wt. | Category |
| A0194 | Malathion | 121-75-5 | C10H19O6PS2 | 330.36 | Pest |
| A0187 | Maneb | 12427-38-2 | [C4H6MnN2S4]x | 265 | Pest |
| A0186 | Manzeb | 8018-017-7 | [C4H6MnN2S4]xZny | 330 | Pest |
| A0015 | Mepronil | 55814-41-0 | C17H19NO2 | 269.34 | Pest |
| A0271 | 2-Mercapto-1-methylimidazole | 60-56-0 | C4H6N2S | 114.17 | Med |
| A0188 | Methomyl | 16752-77-5 | C5H10N2O2S | 162.21 | Pest |
| A0075 | Methoxychlor | 72-43-5 | C16H15Cl3O2 | 345.65 | Pest |
| A0258 | p-Methoxyphenol | 150-76-5 | CH3OC6H4OH | 124.14 | Ind |
| A0107 | Methyltrienolone | 965-93-5 | C19H24O2 | 284.4 | Med |
| A0100 | Metiram | 9006-42-2 | C16H33N11S16Zn3 | 1088.7 | Pest |
| A0189 | Metribuzin | 21087-64-9 | C8H14N4OS | 214.29 | Pest |
| A0106 | Mibolerone | 3704-09-4 | C20H30O2 | 302.5 | Med |
| A0076 | Mirex | 2385-85-5 | C10Cl12 | 545.54 | Pest |
| A0172 | Molinate | 2212-67-1 | C9H17NOS | 187.31 | Pest |
| A0202 | Murisuterone A | 38778-30-2 | C27H44O8 | 496.63 | Nat |