Re: tannic acid in powdered form

[Kathy Olson <kathy@thekrib.com>]

Back when I use to be a chemist before medical school, we would use tannic
acid in different organic experiements.  You can order it from local
chemical supply houses, or find someone you know is a biology/chemistry
school teacher to order it and reiburse them.  It would be nice to find
out concentrations from Uwe though.

Kathy


On Thu, 25 Mar 1999, Marco Lacerda wrote:

> > I've never heard of this before.  If it exists, who makes it and where can a
> > person get it?
> > 
> > G. Kadar
> 
> I buy it in Brazil, in a company based in Sao Paulo, but they import it 
> from overseas, probably from USA or Germany.
> I suggest you check it with a Chemical comapany in US, it shouldn't be 
> difficult to find it.
> Some Apisto books (if I'm not wrong Koslowski's book) suggest that good 
> acid water can be prepared with a combination of tanic acid (mostly for 
> brown color, as it is a "weak" acid and does not drop much pH values) 
> and HCl. But unfortunately no quantities are given, neither by Römer or 
> in the aquarium booksŠ
> 
> 
> 
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