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Aluminum sulfate
Aluminum sulfate octadecahydrate
Molecular formula: Al2(SO4)3·18H2O
Molecular weight: 666.40
[Character] White crystalline or crystalline powder. The relative density of 1.69,86.5℃ partial crystallization water loss. It decomposes at about 600℃ to form trioxide. Soluble in water, insoluble in alcohol. Aqueous solutions are acidic.
[To use] Used to analyze reagents. Also used as mordant, waterproofing agent, grease decolorizing agent and used in leather, paper, pharmaceutical industry.
[Standard]The impurity content is calculated by the highest content
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Specification
Name of index
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Analytically pure-AR
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Chemically pure-CP
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Content [Al2(SO4)3·18H2O] /%
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≥99.0
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≥99.0
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Clarity test
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qualified
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qualified
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Aqueous reaction
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qualified
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qualified
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Water insolubles
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≤0.02
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≤0.05
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Chloride(Cl)
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≤0.002
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≤0.01
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Ammonium salt(NH4)
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≤0.005
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≤0.02
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Ferrum (Fe)
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≤0.003
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≤0.01
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Heavy metal(Pb)
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≤0.001
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≤0.002
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Alkali and alkaline earth metals
(as sulfate)
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≤0.25
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≤0.5
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[Packing] Plastic inside and outside woven, kraft paper bag or cardboard bucket, net weight 25kg.
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