polyhydroxyaluminate

Polyhydroxyaluminates are a class of inorganic compounds characterized by their structure containing multiple hydroxyl groups attached to aluminum atoms, often forming polymeric or oligomeric species. These compounds are typically formed in aqueous solutions under specific pH and temperature conditions, where aluminum ions hydrolyze. The exact structure of polyhydroxyaluminates can vary significantly depending on the concentration of aluminum and hydroxyl ions, as well as the presence of other species in solution. They often exist as polynuclear complexes or extended polymeric networks.

These materials find applications in various fields, including water treatment as flocculants and coagulants, due to their ability to neutralize negative charges on suspended particles and promote aggregation. They are also used as precursors in the synthesis of other aluminum-containing materials, such as zeolites and ceramics. In some cosmetic formulations, specific polyhydroxyaluminates are employed for their antiperspirant properties. Their behavior in solution is complex, influenced by factors like ionic strength and the formation of precipitates. Research continues to explore their precise structures and their potential in diverse technological applications.