These are just pre diluted solutions of HCl .  Concentrated HCl has a Normality
(N) of approximately 12 (12N)

Regards,
Robert Schoonhoven

Charles Read wrote:

> Hello!  While reading through the  Fisher Sci. chemical catalog I noticed
> that in the Hydrochloric Acid section there were many types of HCl, but the
> only difference was one was labeled 0.5N, another labeled 1N and some were
> labeled 2N, what does this refer to?  How does it change it's use?  Thanks
> guys!