| Substance | DK-Value |
| Ultrasil | 1.4 |
| Undecan | 2 |
| Urea | 2.9 |
| Valeric acid | 2.7 |
| Vinegar | 24 |
| Viscose | 34.5 |
| Water | 80.3 |
| Water (680°F/360°C) | 10 |
| Water, demineralized | 29.3 |
| Water, heavy | 78.3 |
| Water-in-oil-emulsion | 24.2 |
| Wax | 1.8 |
| Wheat | 4 |
| Wheat starch | 2.5 |
| White spirit | 2 |
| Wine | 25 |
| Wood chips | 2.3 |
| Wood swarf | 1.5 |
| Xylene | 2.3 |
| Xylitol | 40 |
| Zinc oxide | 1.5 |
| Zinc powder | 4.4 |