ALUMINIUM SULFATE OCTADECAHYDRATE, CAS No. 7784-31-8

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7784-31-8

Catalog No. EBD3070078

CAS 7784-31-8

Name ALUMINIUM SULFATE OCTADECAHYDRATE

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Basic Information

Synonyms: CAKEALUM PATENTALUM PICKLEALUM TRADETERMFORALUM ALUMINUMTRIETHIDE ALUMINIUMSULPHATEGR ALUMINIUMSULPHATEUSP ALUMINUMSULFATE(AS) ALUMINIUMSULFATEOCTADECAHYDRATE dialuminumtrisulfatenonahydrate aluminumsulfatehydrate(2:3:9) Aluminumsulfateoctadecahydrate

Molecular Formula: Al2H2O13S3

Molecular Weight: 360.17

Categories: Materials Chemistry > Polymers and Macromolecular Materials > Polymer Additives Functional Chemicals > Consumer & Industrial Chemicals > Water Treatment Chemicals Synthetic Chemistry > Basic Synthetic Reagents > Inorganic Compounds and Metal Salts

Product Description:

Aluminum sulfate octadecahydrate is an inorganic salt with the chemical formula Al₂(SO₄)₃·18H₂O. It appears as white, lustrous crystals, granules, or powder. It is highly soluble in water, and its aqueous solution is acidic due to hydrolysis. Its primary industrial application is as a flocculating agent in water and wastewater treatment. The aluminum ions hydrolyze to form aluminum hydroxide precipitates, which trap suspended particles, colloids, and organic matter, facilitating their removal and clarifying the water. It is also a crucial raw material in the paper industry, where it is used as a sizing agent to improve ink holdout and water resistance. Furthermore, it serves as a mordant in textile dyeing, helping dyes bind to fabrics. In addition to these major uses, it finds application as a fire retardant, in soil pH adjustment, and as a hardening agent in some construction materials. As a common inorganic salt, it also functions as a source of aluminum ions or sulfate ions in various chemical syntheses and laboratory processes.

Physical Properties

Melting Point: 86 °C

Density: 1,69 g/cm3

Solubility: Soluble in water