| Name | Formula | Dipole moment (debye) |
|---|---|---|
| octadecyloxyethanol | C20H42O2 | 2.15 |
| octafluorocyclobutane | C4F8 | 0.00 |
| octafluoronaphthalene | C10F8 | 0.00 |
| octafluorotetrahydrofuran | C4F8O | 0.56 |
| octanal | C8H16O | 2.31 |
| octanamine | C8H19N | 1.17 |
| octane | C8H18 | 0.00 |
| octanethiol | C8H18S | 1.53 |
| octanoic acid | C8H16O2 | 1.15 |
| octanol | C8H18O | 1.68 |
| octanoyl chloride | C8H15ClO | 2.74 |
| octyl acetate | C10H20O2 | 1.84 |
| octyl hexanoate | C14H28O2 | 1.69 |
| osmium tetroxide | O4Os | 0.00 |
| oxan-4-one | C5H8O2 | 1.72 |
| oxane | C5H10O | 1.74 |
| oxazole | C3H3NO | 1.50 |
| oxetan-2-one | C3H4O2 | 4.18 |
| oxetan-3-one | C3H4O2 | 0.89 |
| oxetane | C3H6O | 1.93 |
| oxirane | C2H4O | 1.89 |
| oxolan-2-one | C4H6O2 | 4.27 |
| oxygen difluoride | F2O | 0.30 |
| ozone | O3 | 0.53 |
| p-acetoxyphenyltrichlorotellurium | C8H7Cl3O2Te | 4.81 |