Definition: It's a chemical compound formed by the reaction of cyanide with aluminium oxide or aluminium hydroxide. It was used in Nazi Germany for industrial purposes. Definition: Anhydrous alkali metal halides are compounds containing hydrogen atoms bonded to two alkyl groups and forming a network of ligands. The term "anhalouidine" refers to one of these compounds, often represented by the formula Al3+ (OH)2. It is a chemical compound with a molecular weight of 140.79 g/mol. Its crystal structure is tetrahedral.