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Three types of imidazolium based ionic liquids, 1-hexyl-3-methylimidazolium tetrafluoroborate ([HMIM][BF₄]), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([EMIM][NTf₂]) and 1-butyl-3-methylimidazolium methylsulfate ([BMIM][MeSO₄]) were prepared and a variety of their fundamental properties such as kinematic (ν) and dynamic (η) viscosities, thermal stability, surface tension (σ ), refractive index (n_D), pH and density (ρ) were investigated as a function of temperature. The coefficients of thermal expansion (α_p) of the pure liquids were also calculated from the experimental values of the density at different temperatures. Electrochemical studies of these pure fluids as media were also studied at screen printed glassy carbon electrode (SP-GCE). The measurements were performed on a single drop of ionic liquids at surface of a screen-printed three electrode cell. The results showed an ideal wide range …