molecular formula: Al2(SO4)3·18H2O
CAS: 7784-31-8
Appearance:
White crystal powder
Properties:
White crystalline or crystalloid powder, 86.5 ℃ losing some gesso, 250 ℃ lost all gesso, forming white powder. About 600 ℃ decomposition generated three alumina. Soluble in water, insoluble in alcohol. Become acidic aqueous solution.
Use:
Analytics reagents. Also used as mordant water-proofing agent, grease decoloring agents and used in leather, paper, pharmaceutical industry.
Details:
|
Test item |
Specification |
|
Reagent grade |
Pharmaceutical grade |
|
Appearance |
Conform |
Conform |
|
Assay [Al2(SO4)3·18H2O]/% |
≥99.0 |
≥99.0 |
|
Clarify degrees test |
Conform |
Conform |
|
Water insoluble/% |
≤0.02 |
≤0.05 |
|
Chloride (Cl)/% |
≤0.002 |
≤0.01 |
|
Ammonium salt (NH4)/% |
≤0.005 |
≤0.02 |
|
Sodium (Na) /% |
≤0.005 |
≤0.015 |
|
Ferric (Fe)/% |
≤0.003 |
≤0.01 |
|
Heavy metal (Pb)/% |
≤0.001 |
≤0.002 |
|
Alkali metal and alkaline metal /% |
≤0.25 |
≤0.5 |
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