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| # | Species | Formula |
| 1752 | 1,1-Dichloroethane | C2H4Cl2 | |
| 1753 | 1,1-Dichloroethane (Geo) | C2H4Cl2 | |
| 1754 | trans-1,2-Dichloroethane | C2H4Cl2 | |
| 1755 | trans-1,2-Dichloroethane (Geo) | C2H4Cl2 | |
| 1756 | 1,2-Dichloropropane | C3H6Cl2 | |
| 1757 | 1,2-Dichlorobenzene | C6H4Cl2 | |
| 1758 | 1,3-Dichlorobenzene | C6H4Cl2 | |
| 1759 | 1,4-Dichlorobenzene | C6H4Cl2 | |
| 1760 | Chlorine monoxide | OCl2 | |
| 1761 | Cl2O (Geo) | OCl2 | |
| 1762 | Carbonyl chloride | COCl2 | |
| 1763 | Carbonyl chloride (Geo) | COCl2 | |
| 1764 | Cl2O2 | O2Cl2 | |
| 1765 | Oxalyl chloride | C2O2Cl2 | |
| 1766 | Oxalyl chloride (Geo) | C2O2Cl2 | |
| 1767 | 1,1-Dichloro-1-nitro-propane | C3H5NO2Cl2 | |
| 1768 | Chlorine heptoxide | O7Cl2 | |
| 1769 | 1,1',2,2'-Tetranitro-1,2-dichloroethane | C2N4O8Cl2 | |
| 1770 | 1,3-Dichloro-1,1,3,3-tetranitropropane | C3H2N4O8Cl2 | |
| 1771 | Fluorodichloromethane | HCFCl2 | |
| 1772 | Dichlorodifluoromethane (Geo) | CF2Cl2 | |
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