Aluminium sulfate

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Aluminium sulfate
Posting date : Aug 11, 2011
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Free Member Scince Jul 29, 2011
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CHEMICAL | Miscellane
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38-
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Other names: Cake alum; Filter alum; Papermaker's alum; Alunogenite; Sulfuric acid CAS No.: 10043-01-3; 7784-31-8 (octadecahydrate) Pubchem: 24850 EC No.: 233-135-0 RTECS No.: BD1700000 Molecular formula: Al2(SO4)3 Molar mass: 342.15 g/mol (anhydrous); 666.42 g/mol (octadecahydrate) Appearance: white crystalline solid hygroscopic Density: 2.672 g/cm3 (anhydrous); 1.62 g/cm3 (octadecahydrate) Melting point: 770 °C (decomp, anhydrous); 86.5 °C (octadecahydrate) Solubility in water: 31.2 g/100 mL (0 °C); 36.4 g/100 mL (20 °C); 89.0 g/100 mL (100 °C) Solubility: slightly soluble in alcohol; dilute mineral acids Acidity: 3.3-3.6 Crystal structure: monoclinic(hydrate)
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