An ionic liquid is a salt in which the ions are poorly coordinated, which results in these solvents being liquid below 100°C, or even at room temperature. At least one ion has a delocalized charge and one component is organic, which prevents the formation of a stable crystal lattice. Properties such as melting point, viscosity, and solubility of starting materials and other solvents, are determined by the substituents on the organic component and by the counter ion. Many ionic liquids have even been developed for specific synthetic problems. For this reason, ionic liquids have been termed "designer solvents”. The absence of volatility is one of the most important benefits of ionic liquids, offering much lower toxicity as compared to low-boiling-point solvents. Room-temperature ionic liquids, molten salts, ambient temperature molten salts/ionic liquids, sponge ionic liquids, liquid organic salts, fused salts, neoteric solvents this are synonyms for the ionic liquids.