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| # | Species | Formula |
| 1777 | Methylphosphonodichloride | CH3OPCl2 | |
| 1778 | Ethylphosphonic dichloride | C2H5OPCl2 | |
| 1779 | Thionyl chloride (Geo) | OSCl2 | |
| 1780 | Thionyl chloride | OSCl2 | |
| 1781 | Sulfuryl chloride (Geo) | O2SCl2 | |
| 1782 | Sulfuryl chloride | O2SCl2 | |
| 1783 | O-Methyldichlorothiophosphate (Geo) | CH3OPSCl2 | |
| 1784 | S-Methyldichlorothiophosphate (Geo) | CH3OPSCl2 | |
| 1785 | Trichloromethyl | CCl3 | |
| 1786 | Chloroform (Geo) | HCCl3 | |
| 1787 | Chloroform | HCCl3 | |
| 1788 | Trichloroethylene | HC2Cl3 | |
| 1789 | 1,1,1-Trichloroethane | C2H3Cl3 | |
| 1790 | 1,2,2-Trichloroethane | C2H3Cl3 | |
| 1791 | 1,2,3-Trichlorobenzene | C6H3Cl3 | |
| 1792 | 1,2,4-Trichlorobenzene | C6H3Cl3 | |
| 1793 | 1,3,5-Trichlorobenzene | C6H3Cl3 | |
| 1794 | Trichloroacetaldehyde | HC2OCl3 | |
| 1795 | Trichlorofluoromethane (Geo) | CFCl3 | |
| 1796 | Fluorotrichloromethane | CFCl3 | |
| 1797 | 1,1',2-Trichloro-1,2,2'-trifluoroethane | C2F3Cl3 | |
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