what is SAID hydrogen chloride?

Answer 1

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.