| # | Species | Formula |
| 7542 | Methyl osmium(III) dihydroxide (Geo) | CH5O2Os | |
| 7543 | Os(CO)4(C2H4) | C6H4O4Os | |
| 7544 | Os(CO)4(C2H4) (Geo) | C6H4O4Os | |
| 7545 | Osmium pentacarbonyl (Geo) | C5O5Os | |
| 7546 | Osmium pentacarbonyl | C5O5Os | |
| 7547 | Os(III)(H2O)6 d5 (Geo) | H12O6Os | |
| 7548 | Os(II)(H2O)6 | H12O6Os | |
| 7549 | Os(II)(H2O)6 (Geo) | H12O6Os | |
| 7550 | Osmium di-acetylacetonate dihydrate (Geo) | C10H18O6Os | |
| 7551 | Osmium di-acetylacetonate dihydrate | C10H18O6Os | |
| 7552 | OsO4N2 (BABWAC) (Geo) | C4H8N2O6Os | |
| 7553 | Osmium(IV) oxide difluoride | OF2Os | |
| 7554 | Osmium(IV) oxide difluoride (Geo) | OF2Os | |
| 7555 | Osmium(III) trifluoride (Geo) | F3Os | |
| 7556 | Os(III)F6 d5 (Geo) | F6Os | |
| 7557 | Os(CO)4(PEt3) | C10H15O4POs | |
| 7558 | Os(CO)4(PEt3) (Geo) | C10H15O4POs | |
| 7559 | Os(Cp)NP2(2+) (BELNOV) (Geo) | C11H23NOP2Os | |
| 7560 | Os(C6H6)CNCl (BEDYUF) (Geo) | C17H14NClOs | |
| 7561 | [Os(NH3)5Cl]++ (Geo) | H15N5ClOs | |
| 7562 | Osmium(IV) oxide dichloride | OCl2Os | |