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Aluminium chloride, also known as aluminium trichloride, is an inorganic compound with the formula AlCl 3. It forms a hexahydrate with the formula [Al(H 2 O) 6 ]Cl 3 , containing six water molecules of hydration .
Aluminium chlorohydrate can be commercially manufactured by reacting aluminium with hydrochloric acid. A number of aluminium-containing raw materials can be used, including aluminium metal , alumina trihydrate , aluminium chloride , aluminium sulfate and combinations of these.
AlCl is synthesized by reaction of liquid aluminium with gaseous HCl at 1200 K and 0.2 mbar to yield gaseous AlCl and hydrogen gas. [1] At 77 K, AlCl is a dark red solid which turns black upon disproportionation at temperatures higher than 180 K.
In hot concentrated hydrochloric acid, aluminium reacts with water with evolution of hydrogen, and in aqueous sodium hydroxide or potassium hydroxide at room temperature to form aluminates—protective passivation under these conditions is negligible. [9] The reaction with aqueous alkali is often written: [2] Al + NaOH + H 2 O → NaAlO 2 ...
Aluminium hydroxide is a feedstock for the manufacture of other aluminium compounds: calcined aluminas, aluminium sulfate, polyaluminium chloride, aluminium chloride, zeolites, sodium aluminate, activated alumina, and aluminium nitrate.
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It involves the reduction of anhydrous aluminium chloride with potassium, produced powdered aluminium: [1] AlCl 3 + 3 K → Al + 3 KCl With advent of more efficient means of electrolysis, e.g., Hall–Héroult process , the Wöhler process and related chemical-based routes became obsolete.
Aluminum chloride hexahydrate, sold under the brand name Hydrosal Gel among others, is a first-line treatment for excessive sweating. [ 1 ] Clinical studies support the efficacy and low incidence of irritation of the 15% aluminum chloride and 2% salicylic acid gel base formula.