| Coal tar | | Coal tar preparations | 2 |
| Cobimetinib | 934660-93-2 | Protein kinase inhibitors | 2 |
| Colestipol | 26658-42-4 | Bile acid sequestrants | 2 |
| Colistin Sulfate | 1264-72-8 | Antibacterials | 2 |
| Condroitin Sulphate Sodium | 8068-37-9 | | 2 |
| Copper | 15158-11-9 | Minerals and electrolytes | 2 |
| Corn starch | | Other substances | 2 |
| Corticotropin | 12427-33-7 | Corticotropic hormones | 2 |
| Creatine | 57-00-1 | Dietary supplements | 2 |
| Cromoglicate Sodium | 15826-37-6 | Other respiratory tract agents | 2 |
| Crospovidone | | Excipients | 2 |
| Cyclofenil | 2624-43-3 | Estrogens | 2 |
| Cysteamine | 60-23-1 | Means in metabolic disorders | 2 |
| Cysteine hydrochloride | | Mucolytics | 2 |
| D-Phenylalanine | 673-06-3 | Other substances | 2 |
| D-Serine | 312-84-5 | Other substances | 2 |
| Dactinomycin | 50-76-0 | Antineoplastics | 2 |
| Daratumumab | 945721-28-8 | Monoclonal antibodies | 2 |
| Dasabuvir | 1132935-63-7 | Anti-HCV agents | 2 |
| Decyl oleate | 3687-46-5 | Dermatics | 2 |
| Dehydrocholic Acid | | Bile acid preparations | 2 |
| Delorazepam | 2894-67-9 | Benzodiazepine agonists | 2 |
| Demecolcine | 477-30-5 | | 2 |
| Denosumab | 615258-40-7 | Calcium regulators | 2 |
| Desoxycorticosterone Pivalate | 808-48-0 | Adrenocorticotropic hormones | 2 |
| Deucravacitinib | 1935514-21-6 | | 2 |
| Devil's claw root | | Herbal remedies | 2 |
| Dexamethasone valerate | 33755-46-3 | Corticosteroids | 2 |
| Dexbrompheniramine Maleate | 132-22-9 | | 2 |
| Dibrompropamidine Isetionate | 614-87-9 | Antimicrobial agents | 2 |
| Diclazuril | 16133-25-8 | | 2 |
| Didecylamine | 7392-19-0 | Reagents and solvents | 2 |
| Diethylstilbestrol | 56-53-1 | Estrogens | 2 |
| Dimercaprol | 59-52-9 | Antidotes | 2 |
| Dimethocaine | 497-19-8 | | 2 |
| Dimetridazole | 329-63-5 | | 2 |
| Diphenidol | 972-02-1 | Antiemetics | 2 |
| Disodium dodecahydrate hydrogen phosphate | 10039-32-4 | Phosphate | 2 |
| Divalproex | 76584-70-8 | Anticonvulsants | 2 |
| Docusate Sodium | 577-11-7 | Laxatives | 2 |