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Al(OH)₃

Aluminium hydroxide

IUPAC : Aluminium hydroxide
HydroxideMineralPharmaceuticalIndustrial

Amphoteric compound (soluble in acid and basic media). Main pharmacy antacid and intermediate of the Bayer process (alumina → aluminium). The mineral gibbsite is a major component of bauxites.

3D ball-and-stick representation of Aluminium hydroxide (formula Al(OH)₃). Constituent atoms: Al, O, H.
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Physical properties

Molar mass78.004 g/mol
State at 20 °Csolid
Density2.42 g/cm³
Melting point—
Boiling point—
Solubility (H₂O)insoluble (amphotère : soluble en acide et en base)

Structure

Crystal systemMonoclinic
3D render modeBall-and-stick

Uses and applications

  • Pharmacy antacid (Maalox, Gaviscon…)
  • Alumina precursor (Bayer process)
  • Vaccine adjuvant (stimulates immune response)
  • Flame retardant (plastics, cabling)
  • Water treatment (flocculation)

Constituent elements

13Al
Aluminium
8O
Oxygen
1H
Hydrogen

References

PubChem CID6328211
CAS21645-51-2
SMILES[Al+3].[OH-].[OH-].[OH-]
Sources : PubChem CID 6328211 · CRC Handbook of Chemistry and Physics

Related processes

Industrial processes involving this compound.