Aluminum sulfate hydrate (Al2(SO4)3•xH2O (x≈14-18))-Crystalline introduce:
Aluminum sulfate hydrate is a chemical compound with the formula Al2(SO4)3•xH2O (x≈14-18). It forms a number of different hydrates, of which the hexadecahydrate Al2(SO4)3•16H2O and octadecahydrate Al2(SO4)3•18H2O are the most common. The heptadecahydrate, whose formula can be written as [Al(H2O)6]2(SO4)3•5H2O, occurs naturally as the mineral alunogen.
Chemical formula:Al2(SO4)3•xH2O (x≈14-18)
Molar mass:666.44 g/mol
Appearance:white crystalline solid;
Density:2.672 g/cm3 (anhydrous);1.62 g/cm3 (octadecahydrate)
Melting point:86.5 °C
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
Magnetic susceptibility (χ):-93.0·10−6 cm3/mol
Refractive index (nD):1.47
Crystal structure:monoclinic (hydrate)
Aluminum sulfate is a chemical compound commonly used as a flocculating agent in the purification of drinking water and waste water treatment plants, and also in paper manufacturing. Used as coagulant in decolorization and COD removal of secondary yeast wastewater effluents. It is also plays a significant role in arsenic removal by coagulation process.
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