| Cobalt | Co | 58.9332 |
| Cobalt Antimonide | CoSb | 180.6932 |
| Cobalt Arsenide | CoAs | 133.8548 |
| Cobalt Blue | Al2CoO4 | 176.89387 |
| Cobalt Boride | Co2B | 128.67739 |
| Cobalt Chloride | CoCl2 | 129.8392 |
| Cobalt Disulfide | CoS2 | 123.0632 |
| Cobalt(II) Acetate | Co(C2H3O2)2 | 177.02124 |
| Cobalt(II) Acetate Tetrahydrate | Co(C2H3O2)2 | 177.02124 |
| Cobalt(II) Aluminate | CoAl2O4 | 176.89388 |
| Cobalt(II) Arsenide | CoAs2 | 208.7764 |
| Cobalt(II) Boride | CoB | 69.7442 |
| Cobalt(II) Bromide | CoBr2 | 218.7412 |
| Cobalt(II) Carbonate | CoCO3 | 118.9421 |
| Cobalt(II) Chloride | CoCl2 | 129.8392 |
| Cobalt(II) Chloride Hexahydrate | CoCl2.6H2O | 237.93088 |
| Cobalt(II) Chromate | CoCrO4 | 174.9269 |
| Cobalt(II) Chromite | CoCr2O4 | 226.923 |
| Cobalt(II) Cyanide | Co(CN)2 | 110.968 |
| Cobalt(II) Ferricyanide | Co3(Fe(CN)6)2 | 600.6984 |
| Cobalt(II) Hydroxide | Co(OH)2 | 92.94788 |
| Cobalt(II) Iodate | Co(IO3)2 | 408.73854 |
| Cobalt(II) Iodide | CoI2 | 312.74214 |
| Cobalt(II) Molybdate | CoMoO4 | 218.8708 |
| Cobalt(II) Naphthenate | Co(C11H10O2)2 | 407.325 |
| Cobalt(II) Nitrate | Co(NO3)2 | 182.943 |
| Cobalt(II) Nitrate Hexahydrate | Co(NO3)2.6H2O | 291.03468 |
| Cobalt(II) Orthosilicate | Co2SiO4 | 209.9495 |
| Cobalt(II) Oxalate | CoC2O4 | 146.9522 |
| Cobalt(II) Oxide | CoO | 74.9326 |
| Cobalt(II) Perchlorate | Co(ClO4)2 | 257.8344 |
| Cobalt(II) Selenide | CoSe | 137.8932 |
| Cobalt(II) Selenite | CoSeO3 | 185.8914 |
| Cobalt(II) Stannate | Co2SnO4 | 300.574 |
| Cobalt(II) Sulfate | CoSO4 | 154.9958 |
| Cobalt(II) Telluride | CoTe | 186.5332 |
| Cobalt(II) Titanate | CoTiO3 | 154.7984 |
| Cobalt(II) Titanite | Co2TiO4 | 229.73099 |
| Cobalt(II) Tungstate | CoWO4 | 306.7708 |
| Cobalt(III) Acetate | Co(C2H3O2)3 | 236.06526 |
| Cobalt(III) Acetylacetonate | CoC15H21O6 | 356.25684 |
| Cobalt(III) Chloride | CoCl3 | 165.2922 |
| Cobalt(III) Fluoride | CoF3 | 115.92841 |
| Cobalt(III) Hydroxide | Co(OH)3 | 109.95522 |
| Cobalt(III) Nitrate | Co(NO3)3 | 244.9479 |
| Cobalt(III) Oxide | Co2O3 | 165.8646 |
| Cobalt(III) Oxide Monohydrate | Co2O3.H2O | 183.87988 |
| Cobalt(III) Sulfide | Co2S3 | 214.0614 |
| Cobalt(III) Titanate | Co2TiO4 | 229.731 |
| Cobalt(IV) Fluoride | CoF4 | 134.92681 |
| Cobalt(IV) Sulfide | CoS2 | 123.0632 |
| Cyanocobalamin | C63H88CoN14O14P | 1,355.36518 |
| Lithium Cobalt Oxide | LiCoO2 | 97.873 |
| Natrium Cobaltnitrite | Na3Co(NO2)6 | 403.93551 |
| Natrium Tricarbonatocobaltate(III) | Na3Co(CO3)3 | 307.9292 |
| Sodium Cobaltnitrite | Na3Co(NO2)6 | 403.93551 |
| Sodium Tricarbonatocobaltate(III) | Na3Co(CO3)3 | 307.9292 |