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Aluminium ammonium sulfate dodecahydrate
(ammonium alum)
CAS no: 7784-26-1 Formula: AlNH4(SO4)2.12H2O Molecular weight: 453.331
Physical Data
Appearance: Colorless, powdery crystals.
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Melting point: 94.5°C
Boiling point: ~280°C (decomposes)
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Density: 1.65 g/cm3
Solubility: -
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Thermodynamic Data
Enthalpy of formation: -
Gibbs energy of formation: -
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Entropy: -
Heat capacity: -
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Production and preparation
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Behavior and Chemical Properties
The hydrated salt becomes anhydrous at about 250°C.
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History and Uses
Use in purifying drinking water, dyeing and printing fabric.
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Hazard, Storage and Handling
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(Last update: February 2003) |
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