Aluminium hydroxide, also known as aluminic hydroxide, is an inorganic compound with the chemical formula Al(OH)₃. It is found in nature as the mineral gibbsite (also known as hydrargillite) and its three rarer polymorphs: bayerite, doyleite, and nordstrandite. Here are some key points about aluminium hydroxide:

1. Amphoteric Properties:

   • Aluminium hydroxide exhibits both basic and acidic properties.

   • Closely related compounds include aluminium oxide hydroxide (AlO(OH)) and aluminium oxide (Al₂O₃), both of which are also amphoteric.

   • These compounds are major components of the aluminium ore bauxite.

2. Uses:

   • Aluminium hydroxide has various applications:

     • In the construction industry, it is used in materials like drywall and cement.

     • As a binder in pharmaceutical tablets and capsules.

     • In the food industry, it acts as a firming agent.