Surface tension of pure and water-containing ionic liquid C5MIBF4 (1-methyl-3-pentylimidazolium tetrafluoroborate).

The surface tension of ionic liquid (IL) C(5)MIBF(4) (1-methyl-3-pentylimidazolium tetrafluoroborate) with various amount of water was measured by the forced bubble method at 278.15 to 338.15+/-0.