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a colorless gas, HCl, having a pungent odor: the anhydride of hydrochloric acid.
a colourless pungent corrosive gas obtained by the action of sulphuric acid on sodium chloride: used in making vinyl chloride and other organic chemicals. Formula: HCl
an aqueous solution of hydrogen chloride; hydrochloric acid

hydrogen chloride n.
A colorless, fuming, corrosive, very soluble, suffocating gas that forms hydrochloric acid in solution.
hydrogen chloride
A colorless, corrosive, suffocating gas used in making plastics and in many industrial processes. When mixed with water, it forms hydrochloric acid. Chemical formula: HCl.


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