Thermodynamic and spectroscopic study on molecular interaction in aqueous solution of tetraethylene glycol monomethyl ether

► Density, viscosity, and surface tension have been reported. ► The excess properties VE, Δη, and ΔG*E were calculated. ► Values of VE, Δη, and ΔG*E have been fitted by the Redlich-Kister polynomial equation. ► Intermolecular interactions were analyzed with UV-vis and fluorescence spectrum.