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| # | Species | Formula |
| 6020 | Z-1,2-Diiodoethylene (Geo) | C2H2I2 | |
| 6021 | 1,2-Diiodoethane | C2H4I2 | |
| 6022 | 1,2-Diiodopropane | C3H6I2 | |
| 6023 | 1,3-Diiodopropane | C3H6I2 | |
| 6024 | 1,2-Diiodobutane | C4H8I2 | |
| 6025 | 1,4-Diiodobutane | C4H8I2 | |
| 6026 | 1,2-Diiodobenzene | C6H4I2 | |
| 6027 | 1,2-Diiodobenzene (Geo) | C6H4I2 | |
| 6028 | Li(II)2I2N4 (SAJVAA) (Geo) | C12H32Li2N4I2 | |
| 6029 | Li(II)2I2N4 (SAJVAA) | C12H32Li2N4I2 | |
| 6030 | 5,7-Diiodo-8-hydroxyquinoline | C9H5NOI2 | |
| 6031 | 1,2 Diiodotetrafluoroethane | C2F4I2 | |
| 6032 | Sodium iodide, dimer (Geo) | Na2I2 | |
| 6033 | Magnesium diiodide | MgI2 | |
| 6034 | Magnesium diiodide (Geo) | MgI2 | |
| 6035 | Al(III)C2I2(-) (CSIMAL) (Geo) | C2H6AlI2 | |
| 6036 | Al(III)C2I2(-) (CSIMAL) | C2H6AlI2 | |
| 6037 | Silicon diiodide | SiI2 | |
| 6038 | Diiodosilane | H2SiI2 | |
| 6039 | C2PI (GUTJOU) (Geo) | C10H6P2I2 | |
| 6040 | Potassium iodide, dimer (Geo) | K2I2 | |
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