[Rockhounds] muriatic acid for cleaning...

[J Bryan Kramer]

Yes and no, CO2 is about 380 parts per million in the atmosphere, 5% would
be 50000 ppm. And 5% would kill you for that matter.

BK

On 9/2/07, Rik Hill <rhill at lpl.arizona.edu> <rhill24 at cox.net> wrote:
>
>
> I don't know what your "finds" are but I have several comments. First, be
> very, very careful. That acid puts out nasty toxic fumes CO2. Make sure your
> ventilation is adequate (our outside is better) and don't get your face
> close to the work. It would be wise to dilute the acid. I almost never use
> Muriatic unless I have silicified fossils to remove. Mostly I use vinegar
> which is usually strong enough.
>
>


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