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| # | Species | Formula |
| 2515 | Chlorine heptoxide | O7Cl2 | |
| 2516 | 1,1',2,2'-Tetranitro-1,2-dichloroethane | C2N4O8Cl2 | |
| 2517 | 1,3-Dichloro-1,1,3,3-tetranitropropane | C3H2N4O8Cl2 | |
| 2518 | Dichlorofluorborane | BFCl2 | |
| 2519 | Fluorodichloromethane | HCFCl2 | |
| 2520 | Dichlorodifluoromethane (Geo) | CF2Cl2 | |
| 2521 | Difluorodichloromethane | CF2Cl2 | |
| 2522 | 1,2-Dichloro 1,1,2,2-tetrafluoroethane | C2F4Cl2 | |
| 2523 | Sodium chloride, dimer (Geo) | Na2Cl2 | |
| 2524 | Sodium chloride, dimer | Na2Cl2 | |
| 2525 | Magnesium dichloride | MgCl2 | |
| 2526 | Magnesium dichloride (Geo) | MgCl2 | |
| 2527 | Mg(II)O4Cl2 (CEXWUX10) (Geo) | C8H20O6MgCl2 | |
| 2528 | Mg(II)O4Cl2 (CEXWUX10) | C8H20O6MgCl2 | |
| 2529 | Mg(II)2(Cp)2Cl4O2 (LAKLEO) (Geo) | C18H30O2Mg2Cl2 | |
| 2530 | Mg(II)2(Cp)2Cl4O2 (LAKLEO) | C18H30O2Mg2Cl2 | |
| 2531 | AlCl2, cation | AlCl2 | |
| 2532 | Aluminum dichloride | AlCl2 | |
| 2533 | Aluminum dichloride, anion | AlCl2 | |
| 2534 | Aluminum dichloride fluoride | FAlCl2 | |
| 2535 | Dichlorosilylene (Geo) | SiCl2 | |
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