Table 1.
Physicochemical characteristics of nonionic surfactants.
| Nonionic surfactants | Molecular formula | MW (Mn)a | HLBa | CMC (mM)a at 25 °C | CP (°C)a at 1% |
|---|---|---|---|---|---|
| Tween 20 | C58H114O26 | ~1228 | 16.7 | 0.06 | ~76 |
| Tween 80 | C64H124O26 | ~1310 | 15 | 0.012 | ~65 |
| Brij 35 | (C2H4O)23C12H25OH | ~1198 | 16.9 | 0.09 | >100 |
| Brij 56 | (C2H4O)10C16H33OH | ~683 | 12 | 0.035 | ~73 |
| Brij 58 | (C2H4O)20C16H33OH | ~1124 | 16 | 0.08 | >100 |
a
The average molecular weights (MW), HLB values, CMC values and the cloud points (CP) were determined and provided by the manufacturers.