Well, Chloride is a halide, and there is some interaction. Since color neg is carefully balanced, I would avoid Chloride ion if at all possible. Kodak quit using HAHCl just about when I joined the company for just that reason. In fact, there was none on the shelves when I came there. Everything was HAS and so I did not get to run the experiment comparing the two. I just accepted the "current wisdom" on the subject.

Maybe I should not have, but that was the accepted situation back then.