Wiktionary
nitrosyl chloride
n. (context inorganic compound English) The compound NO-Cl
Wikipedia
Nitrosyl chloride
Nitrosyl chloride is the chemical compound with the formula NOCl. It is a yellow gas that is most commonly encountered as a decomposition product of aqua regia, a mixture of hydrochloric acid and nitric acid. It is a strong electrophile and oxidizing agent.