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| # | Species | Formula |
| 1798 | Phosphorus oxychloride | OPCl3 | |
| 1799 | Phosphorus oxychloride (Geo) | OPCl3 | |
| 1800 | SOCl3 | OSCl3 | |
| 1801 | Carbon tetrachloride | CCl4 | |
| 1802 | Carbon tetrachloride (Geo) | CCl4 | |
| 1803 | Tetrachloroethylene (Geo) | C2Cl4 | |
| 1804 | Tetrachloroethylene | C2Cl4 | |
| 1805 | 1,1,2,2-Tetrachloroethane | C2H2Cl4 | |
| 1806 | 1,2,2,2-Tetrachloroethane | C2H2Cl4 | |
| 1807 | 1,2,3,4-Tetrachlorobenzene | C6H2Cl4 | |
| 1808 | 1,2,3,5-Tetrachlorobenzene | C6H2Cl4 | |
| 1809 | 1,2,4,5-Tetrachlorobenzene | C6H2Cl4 | |
| 1810 | Trichloroacetyl chloride | C2O2Cl4 | |
| 1811 | 2,3,5,6-Tetrachloro-1,4-benzoquinone | C6O2Cl4 | |
| 1812 | 2,3,5,6-Tetrachloro-1,4-benzoquinone (Geo) | C6O2Cl4 | |
| 1813 | SOCl4 | OSCl4 | |
| 1814 | Pentachloroethane | HC2Cl5 | |
| 1815 | Pentachlorobenzene | HC6Cl5 | |
| 1816 | Pentachlorophenol | HC6OCl5 | |
| 1817 | Hexachloroethane (Geo) | C2Cl6 | |
| 1818 | Hexachloroethane | C2Cl6 | |
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