Noun
cyanogen chloride (uncountable)
(inorganic chemistry) A toxic chemical compound with the formula NCCl.
The cyanide salt absorbed in the basic solution is buffered at pH 4.5 and then reacted with chlorine to form cyanogen chloride. Source: Internet
The cyanogen chloride formed couples pyridine with barbituric acid to form a strongly colored red dye that is proportional to the cyanide concentration. Source: Internet