Alumina Trihydrate

Name:
Alumina Trihydrate
Detailed information:

Chemistry name:	aluminum hydroxide; aluminum hydrate; hydrated alumina; hydrated aluminum oxide
M Formula:	Al2O3•3H2O or Al(OH)3
Properties:
White crystalline powder, balls, or granules. D 2.42. Insoluble in water; soluble in mineral acids and caustic soda. Releases water on heating.
Derivation:
From bauxite. The ore is dissolved in strong caustic and aluminum hydroxide precipitated from the sodium aluminate solution by neutralization (as with carbon dioxide) or by autoprecipitation (Bayer process).
Grade:
Technical, CP.
Use:
Glass, ceramics, iron-free aluminum and aluminum salts, manufacture of activated alumina, base for organic lakes, flame retardants, mattress batting. Finely divided form (0.1–0.6 microns) used for rubber reinforcing agent, paper coating, filler, cosmetics.