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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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