👉 Hall fluid, also known as Hall's fluid or Hall's solution, is a colloidal suspension composed primarily of polysaccharides, such as cellulose derivatives, and other organic compounds. It was first discovered by the American chemist Charles Hall in 1913. These fluids exhibit unique rheological properties, including shear-thinning behavior, meaning their viscosity decreases under shear stress. This characteristic makes Hall fluid useful in various industrial applications, such as in the food industry for thickening agents, cosmetics for texture modification, and in pharmaceuticals for controlled drug release. The stability of Hall fluid is attributed to the complex interactions between the polysaccharides and water, which form a network that resists deformation.
