[Jewelry making - Article 00521] - Re: [Orchid] Disposing of Ferric Chloride - safety is key!

[Jeff Georgantes]

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>     I seem to remember a chemist telling me that since Ferric Chloride
>     is a salt not an acid, she didn't think adding baking soda would
>     do anything. Does this make sense? Nitric acid, pickle, etc can use
>     the baking soda, but not the chlorides. 

    One of the tech people at Bryant Labs in Berkeley, explained to me a
    while back ago that ferric chloride when exposed to oxygen through
    use separates into hydrochloric acid and ferric (iron). He said that
    at that point it's hydrochloric acid doing the etching not the salt,
    ferric chloride and that baking soda is an appropriate neutralizer.
    I'm not a chemist, but it sounded good got me. 

Jeff Georgantes
Dartmouth College
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