| Coagulation Factor VIIa Recombinant Human | 102786-61-8 | | 0 |
| Coagulation factor XIa | 9013-55-2 | Other substances | 0 |
| Cobalamin | 13408-78-1 | Therapeutic Nutrients/Minerals/Electrolyte | 0 |
| Cobalt | 7440-48-4 | | 0 |
| Cobalt chloride | 7646-79-9 | Emollients and protectives | 0 |
| Cobaltous cation | 22541-53-3 | | 0 |
| Cobaltous sulfate | 10124-43-3 | | 0 |
| Cobamamide | 13870-90-1 | Other substances | 0 |
| Cobiprostone | 333963-42-1 | | 0 |
| Cobitolimod | 1226822-98-5 | | 0 |
| Coblopasvir | 1312608-46-0 | Anti-infective Agents | 0 |
| Cobnabexagene anvuparvovec | 2364477-18-7 | | 0 |
| Cobolimab | 2022215-65-0 | Other substances | 0 |
| Cobomarsen | 1848257-52-2 | | 0 |
| Coccidioides immitis spherule | | | 0 |
| Cocoa | 84649-99-0 | | 0 |
| Cocoa butter | 8002-31-1 | Anesthetics | 0 |
| Coconut oil | 8001-31-8 | | 0 |
| Cocoyl caprylocaprate | | | 0 |
| Cod liver oil | 8001-69-2 | Dental and Oral Agents | 0 |
| Codeine methylbromide | 125-27-9 | | 0 |
| Codeine-N-oxide | 3688-65-1 | | 0 |
| Codoxim | | | 0 |
| Codrituzumab | 1365267-33-9 | Other substances | 0 |
| Coelenteramide | | | 0 |
| Coenzyme A | 85-61-0 | Enzyme Replacements/modifiers | 0 |
| Coenzyme A persulfide | 81918-99-2 | Other substances | 0 |
| Coenzyme F420 | 64885-97-8 | Other substances | 0 |
| Colchiceine | 477-27-0 | Anti-Gout | 0 |
| Coleneuramide | 204200-47-5 | | 0 |
| Colestilan chloride | 95522-45-5 | Gastrointestinal Agents | 0 |
| Colforsin | 66575-29-9 | | 0 |
| Colfosceril palmitate | 63-89-8 | | 0 |
| Coltuximab ravtansine | 1269764-99-9 | Enzyme Replacements/modifiers | 0 |
| Coluracetam | | | 0 |
| Combretastatin | 82855-09-2 | Antineoplastics | 0 |
| Combretastatin A4 | 117048-59-6 | Antineoplastics | 0 |
| Compound 18 | 31112-66-0 | | 0 |
| Conatumumab | 896731-82-1 | Anticancer drugs | 0 |
| Conbercept | 1227158-72-6 | Other substances | 0 |