Sodium Hexametaphosphate Powder is a dry powder dispersion agent that is added to soil hydrometer solutions to keep clay platelets from adhering together in the sedimentation solution. It is used in soil hydrometer analysis to identify silt as well as clay fractions. Sodium hexametaphosphate is widely used as a deflocculant in the preparation of clay-based ceramic particles. It is also used as a dispersion agent to break down clay and other soil types in order to analyse soil texture.