| Product Name | CAS Registry Number |
| Luliconazole | 187164-19-8 |
| Lumazine | 487-21-8 |
| Luteolin | 491-70-3 |
| Luxabendazole | 90509-02-7 |
| Lycopene | 502-65-8 |
| Lynestrenol | 52-76-6 |
| Lypressin | 50-57-7 |
| Lyral | 31906-04-4 |
| Lysine clonixinate | 55837-30-4 |
| Lysozyme hydrochloride | 9066-59-5 |