The review article "Interferometric Probing of Physical and Chemical Properties of Solutions: Noncontact Investigation of Liquids" is intended to serve as a starting point in the search for non-contact measurement methods, especially for liquids. It briefly introduces suitable optical interferometer types and gives an overview of recent research work on the characterization of various chemical-physical properties (e.g. pressure, temperature, composition) and on the investigation of a wide variety of phenomena (e.g. evaporation, crystal growth, diffusion, thermophoresis) .