| Product Name | CAS Registry Number |
| Oxandrolone | 53-39-4 |
| Oxapium iodide | 6577-41-9 |
| Oxaprozin | 21256-18-8 |
| Oxasulfuron | 144651-06-9 |
| Oxazoline | 27341-52-2 |
| Oxcarbazepine | 28721-07-5 |
| Oxethazaine | 126-27-2 |
| Oxfendazole | 53716-50-0 |
| Oxibendazole | 20559-55-1 |
| Oxiconazole | 64211-45-6 |