Description Tetrahexylammonium hydroxide is a phase-transfer reagent that can be used:To synthesize β-D-xyloside- and β-D-xylobioside-based ionic liquids containing tetrahexylammonium cation.As an alkali-free gelling agent to prepare amorphous microporous silica-alumina.To synthesize tetrahexylammonium prolinate, a promising candidate to prepare a solid supported ionic liquid phase (SILP) carbon dioxide absorber.