Matthew,
What is .1 M? How does that translate into ppm?

I didn’t mean to imply that silver didn’t accumulate
in the body, the “Blue Bloods” demonstrated that.
Peter Lindeman’s testing concerned the accumulation of
colloidal silver (EIS). Of course silver powder,
probably silver compounds, and maybe even very large
particle, coffee-colored CS (such as Stan Jones
brewed) could accumulate, but in all those cases, it
would seem to be because of the large particle size,
and none of those three categories is colorless.

In the case of silver nitrate, although it is
colorless, it has a distinct staining property, which
would certainly account for it causing argyria. See:

http://www.espimetals.com/msds's/Silver%20Nitrate.htm 


"Effects of Exposure: Caustic and irritating to the
skin and mucous membranes. Absorption over a long
period may cause argyria (grayish discoloration of
various tissues). Industrial argyria may be local,
involving formation of gray-blue particles on the skin
or in the conjunctivae, or generalized, in which the
uncovered skin becomes pigmented. Ingestion can cause
severe gastroenteritis."

Also:
http://www.epa.gov/pesticides/biopesticides/ingredients/factsheets/factsheet_072503.htm


"Silver nitrate is a non-food-use active ingredient
that is not toxic to humans. Applicators are
instructed to use gloves to protect against contact
with the skin because silver nitrate can discolor
skin."

The staining property of silver nitrate seems to set
it in a separate class as far as argyria goes, since
its lack of color could be unrelated concerning its
argyria-causing potential. Would it be causative of
argyria if it had no staining property?

Are there other silver preparations that you are aware
of that are scientifically implicated in the occasion
of argyria?

Terry Chamberlin


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