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Posted to rec.woodworking
Enoch Root
 
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Default Potassium Dichromate

wrote:
wrote:

Joe wrote:

You might be confusing this with another potassium compound.
I assume he refers to K2Cr2O7 which is useful in photographic
processing among other uses, and, as a matter of fact, is the active
ingredient in an over-the-counter headache remedy...cannot remember
the name.
Basically it is an oxidizer.



Not correct at all. Read the MSDS on potassium dichromate.

Toxic as all hell, and a very well-known carcinogen.



Trivalent chromium is an essential nutrient and might be found
in a headache medecine. Hexavalent chromium is quite toxic
but fortunately, poorly absorbed via the digestive track (due to
the pH of stomache acid) for most people. Inhalation of the
dust is another matter.


There's a wide range of pH levels along the gut. Metals pass through
the lining via mechanisms for which there is, very likely for any
heavily oxidized form of chromium, no specific one.

Neither is there one in the lungs, but there's also less protective
glycoproteins or proteoglycans, and less transient flotsam lying about
for the ion to bind with or associate with, no flora that might have an
interest in it, and there's no exit if the cilia can't beat it out.

I'm just guessing though, and I could be wrong.

er
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