| No. | CAS # | Product Names | Molecular Formula |
| 1 | 57455-37-5 | Ultramarine Blue | |
| 2 | 103597-45-1 | Ultraviolet Absorbent UV-360 | C41H50N6O2 |
| 3 | 2725-22-6 | Ultraviolet Absorbent UV-1164 | C33H39N3O2 |
| 4 | 104-67-6 | Undecan-4-olide | C11H20O2 |
| 5 | 1852-04-6 | Undecanedioic acid | C11H20O4 |
| 6 | 710-04-3 | Undecanolactone | C11H20O2 |
| 7 | 83657-22-1 | Uniconazole | C15H18ClN3O |
| 8 | 26123-45-5 | Unsaturated polyester resin | |
| 9 | 66-22-8 | Uracil | C4H4N2O2 |
| 10 | 9011-05-6 | Urea formaldehyde | C3H8N2O3 |
| 11 | 4861-19-2 | Urea phosphate | CH4N2O.H3O4P |
| 12 | 57-13-6 | urea | CH4N2O |
| 13 | 51-79-6 | Urethane | C3H7NO2 |
| 14 | 58-96-8 | Uridine | C9H12N2O6 |
| 15 | 128-13-2 | ursodeoxycholic acid | C24H40O4 |
| 16 | 77-52-1 | Ursolic acid | C30H48O3 |