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| # | Species | Formula |
| 2553 | S-Methyldichlorothiophosphate (Geo) | CH3OPSCl2 | |
| 2554 | ClSSCl | S2Cl2 | |
| 2555 | ClSSCl (Geo) | S2Cl2 | |
| 2556 | Cl3(-) | Cl3 | |
| 2557 | Lithium chloride, trimer (guessed) (Geo) | Li3Cl3 | |
| 2558 | Lithium chloride, trimer | Li3Cl3 | |
| 2559 | Boron trichloride (Geo) | BCl3 | |
| 2560 | Boron trichloride | BCl3 | |
| 2561 | Trichloromethyl | CCl3 | |
| 2562 | Chloroform (Geo) | HCCl3 | |
| 2563 | Chloroform | HCCl3 | |
| 2564 | Trichloroethylene | HC2Cl3 | |
| 2565 | 1,1,1-Trichloroethane | C2H3Cl3 | |
| 2566 | 1,2,2-Trichloroethane | C2H3Cl3 | |
| 2567 | 1,2,3-Trichlorobenzene | C6H3Cl3 | |
| 2568 | 1,2,4-Trichlorobenzene | C6H3Cl3 | |
| 2569 | 1,3,5-Trichlorobenzene | C6H3Cl3 | |
| 2570 | Be(II)Cl3N(-) (FASQUM) (Geo) | H7BeC2NCl3 | |
| 2571 | Be(II)Cl3N(-) (FASQUM) | H7BeC2NCl3 | |
| 2572 | B3N3Cl3H3 | H3B3N3Cl3 | |
| 2573 | Trichloroacetaldehyde | HC2OCl3 | |
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