| Name | CAS No. |
| sec-Butyl Acetate | 105-46-4 |
| Soybean Oil Epoxide | 8013-07-8 |
| Salicylic acid | 69-72-7 |
| Samarium | 7440-19-9 |
| Sandacanol | 28219-61-6 |
| Selenium | 7782-49-2 |
| SILICA | 68909-20-6 |
| Silica glass | 10279-57-9 |
| Silicon | 7440-21-3 |
| Silicon Carbide (Black) | 409-21-2 |
| Silver nitrate | 7761-88-8 |
| Sodium | 881-17-4 |
| Sodium acetate anhydrous | 127-09-3 |
| Sodium bicarbonate | 144-55-8 |
| Sodium carbonate | 497-19-8 |