👉 The Harold fluid, also known as the Harold solution or Harold's solution, is a colloidal suspension of sodium hexametaphosphate (Na₄HP₂P) in water, named after physicist Harold Urey. This solution is widely used in analytical chemistry and materials science for its unique properties, including high stability and low viscosity. The Harold fluid is particularly valued for its ability to form a protective layer around nanoparticles, preventing aggregation and enhancing colloidal stability. This makes it an essential tool in various applications such as catalysis, drug delivery, and the preparation of advanced materials. Its low surface tension and high surface activity further contribute to its utility in these fields, allowing for efficient mixing and dispersion of substances.
