| # | Species | Formula |
| 5035 | Ruthenium pentacarbonyl (Geo) | C5O5Ru | |
| 5036 | Ruthenium pentacarbonyl | C5O5Ru | |
| 5037 | Ru(II)(H2O)6(2+) (BONPEZ) (Geo) | H12O6Ru | |
| 5038 | Ru(II)(H2O)6(2+) (BONPEZ) | H12O6Ru | |
| 5039 | Ru(II)(H2O)6 | H12O6Ru | |
| 5040 | Ru(II)(H2O)6 (Geo) | H12O6Ru | |
| 5041 | Ru(CO)3(H2O)3(2+) (GOZYOJ01) (Geo) | C3H6O6Ru | |
| 5042 | Ru(CO)3(H2O)3(2+) (GOZYOJ01) | C3H6O6Ru | |
| 5043 | Ru(Acac)2.2H2O | C10H18O6Ru | |
| 5044 | Ru(Acac)2.2H2O (Geo) | C10H18O6Ru | |
| 5045 | Ru(III)O6 (ACACRU) (Geo) | C15H21O6Ru | |
| 5046 | Ru(III)O6 (ACACRU) | C15H21O6Ru | |
| 5047 | Ru(C4H4N2COO)2(H2O)2 | C10H10N4O6Ru | |
| 5048 | Ru(C4H4N2COO)2(H2O)2 (Geo) | C10H10N4O6Ru | |
| 5049 | Ru(NO2)4(CO)(H2O)(2+) (ILEVOK) (Geo) | CH2N4O10Ru | |
| 5050 | Ru(III)(Ox)3(3-) (DUKNOM) (Geo) | C6O12Ru | |
| 5051 | Ru(III)(Ox)3(3-) (DUKNOM) | C6O12Ru | |
| 5052 | Ruthenium(I) fluoride (Geo) | FRu | |
| 5053 | Ruthenium(I) fluoride | FRu | |
| 5054 | Ruthenium(IV) oxide difluoride (Geo) | OF2Ru | |
| 5055 | Ruthenium(IV) oxide difluoride | OF2Ru | |