At 10:56 PM 5/31/2005 +0100, you wrote:
>In message <5.1.1.5.2.20050531171753.01e95428@mail.interlog.com>
>           Spehro Pefhany <speff@interlog.com> wrote:
>
> > I don't think the ferric chloride is all that bad for you (tastes terrible)
> > unless you ingest enough to get iron poisoning (liver damage, death etc.).
>
>"A fatal case of acute ferric chloride poisoning"
>Tinyurl: <http://tinyurl.com/dhyur>
>(<http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~V8m6v1:5>)

She drank 200ml of the stuff, not just traces on the fingertips!

Here's an MSDS

http://www.jtbaker.com/msds/englishhtml/f1080.htm

"Low systemic toxicity in small quantities but..."


>One other thing worth noting is that most premixed etching-grade FeCl has
>hydrochloric acid added - it's used as an anti-sludging agent IIRC.
>
>Anyway, I'm using a 3-litre (IIRC) polypropylene cereal container as an etch
>tank. There's a bubbler Araldited into the bottom and an aquarium heater
>fitted to one side. I had loads of trouble with "Combi Heater" branded
>heaters breaking - three DOA, 100% failure rate. I've got a Visi-Therm now,
>which seems to be OK. It's only 25W though; in hindsight I should probably
>have bought something a bit bigger.
>
>Word of warning: test the heater in water first. I doubt you'd get a
>replacement heater if you tried to take back a dead heater that was covered
>in FeCl stains :)

The stuff is a killer for any kind of precision machine tools- results in a
thin layer of rust on everything made of tool steel.

>Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspeff


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