text: what is said hydrogen chloride?   not sure i understand your question here . . .  are you asking about for something said about hydrogen chloride, hcl, or is there some more specific product called "said hydrogen chloride" you are interested in?  i googled the term "said hydrogen chloride", and came up with a bunch of references that use that phrase.  in each case, they are using a legalese construction when referring to hydrogen chloride gas, or hydrochloric acid.