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Aluminium hydroxide (CAS 21645-51-2)


Aluminium hydroxide (CAS 21645-51-2)

Aluminium hydroxide, Al(OH)3, is found in nature as the mineral gibbsite (also known as hydrargillite) and its three much rarer polymorphs: bayerite, doyleite, and nordstrandite. Aluminium hydroxide is amphoteric, i.e., it has both basic and acidic properties. Closely related are aluminium oxide hydroxide, AlO(OH), and aluminium oxide or alumina (Al2O3), the latter of which is also amphoteric. These compounds together are the major components of the aluminium ore bauxite.



Industries: Cosmetic industry, Pharmaceutical industry
CAS number: 21645-51-2
WE number: 244-492-7
Chemical formula: AlH3O3
Molar mass: 78 g/mol
Customs tariff code: 28183000

Other physical properties

Melting / freezing point: 200-300°C
Relative density: 2,35 – 3,44 g/cm3

Additional information

Käytettävissä oleva määrä
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