To date, there are numerous applications that have been studied for DES. By varying the components of the DES and their molar ratios, new DES can be produced. For this reason, many new applications are presented in the literature every year. Some of the earliest applications of DES were the electrofinishing of metals using DES as electrolytes. Organic compounds such as benzoic acid (solubility 0.82 mol/L) have great solubility in DES, and this even includes cellulose. [http://www.providespaper.eu/] For this reason, DES were applied as extraction solvents for such material from their complex matrices.