A chemical compound containing copper bonded with cyanide groups, used in metalworking and electroplating processes.
From Latin 'cuprum' (copper) combined with 'cyanide' (CN- ions). These compounds were developed for industrial metal treatment in the 19th century.
Despite containing toxic cyanide, cuprocyanide compounds were crucial for creating the shiny chrome and gold plating on everything from car bumpers to jewelry, representing one of chemistry's useful paradoxes.
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