Surface-tension values
# Surface-tension values

This is a table of surface tension values for some interfaces at the indicated temperatures. Note that the SI units millinewtons per meter $(mN·m^{−1})$ are equivalent to the cgs units dynes per centimetre $(dyn·cm^{−1}).$

| Interface | Temperature | γ $(mN·m^{−1})$ |
| - | - | - |
| Water–air | 20 °C | 72.86 ± 0.05 |
| Water–air | 21.5 °C | 72.75 |
| Water–air | 25 °C | 71.99±0.05 |
| Methylene iodide–air | 20 °C | 67.00 |
| Methylene iodide–air | 21.5 °C | 63.11 |
| Ethylene glycol–air | 25 °C | 47.3 |
| Ethylene glycol–air | 40 °C | 46.3 |
| Dimethyl sulfoxide–air | 20 °C | 43.54 |
| Propylene carbonate–air | 20 °C | 41.1 |
| Benzene–air | 20 °C | 28.88 |
| Benzene–air | 30 °C | 27.56 |
| Toluene–air | 20 °C | 28.52 |
| Chloroform–air | 25 °C | 26.67 |
| Propionic acid–air | 20 °C | 26.69 |
| Butyric acid–air | 20 °C | 26.51 |
| Carbon tetrachloride–air | 25 °C | 26.43 |
| Butyl acetate–air | 20 °C | 25.09 |
| Diethylene glycol–air | 20 °C | 30.09 |
| Nonane–air | 20 °C | 22.85 |
| Methanol–air | 20 °C | 22.50 |
| Ethanol–air | 20 °C | 22.39 |
| Ethanol–air | 30 °C | 21.55 |
| Octane–air | 20 °C | 21.61 |
| Heptane–air | 20 °C | 20.14 |
| Ether–air | 25 °C | 20.14 |
| Hexane-air | 20 °C | 17.9 |
| Mercury–air | 20 °C | 486.5 |
| Mercury–air | 25 °C | 485.5 |
| Mercury–air | 30 °C | 484.5 |
| NaCl–air | 1073 °C | 115 |
| KClO3–air | 20 °C | 81 |
| Water–1-Butanol | 20 °C | 1.8 |
| Water–Ethyl acetate | 20 °C | 6.8 |
| Water–Heptanoic acid | 20 °C | 7.0 |
| Water–Benzaldehyde | 20 °C | 15.5 |
| Water–transformer oil | 20 °C | 37.2 |
| Water–Mercury | 20 °C | 415 |
| Ethanol–Mercury | 20 °C | 389 |
| Water–1,2-Dichloroethane | 20 °C | 30.5 ± 0.3 |
| Water–α,α,α-trifluorotoluene | 20 °C | 38.0 ± 0.5 |
| Water–nitrobenzene | 20 °C | 24.4 ± 0.2 |
| Water–nitromethane | 20 °C | 16.0 ± 0.2 |
| Water–propylene carbonate | 20 °C | 2.9 ± 0.1 |
