Muriatic acid is hydrochloric acid at a particular concentration (20-30%. IIRC); purity is not particularly important for many applications, and may not be guaranteed in hardware store supplies.
Donald.
----- Original Message -----
> From: "lists Stuartlists@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com>
> To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> Sent: Friday, June 10, 2016 5:05:46 AM
> Subject: Re: [Homebrew_PCBs] Re: Amount of etchant needed
>
> In article <02fb01d1b8b8$d85b9970$8912cc50$@...>,
> 'Dave Wade' dave.g4ugm@... [Homebrew_PCBs]
> <Homebrew_PCBs@yahoogroups.com> wrote:
> > Hydrochloric Acid
>
> That is it's proper chemical name, recognised by Chemists all over the
> world. Others are historic or local names.
>
> --
> Stuart Winsor
>
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