Source for digitonin?

[Ian A. York]

I use digitonin as a detergent.  I've usually got it from Sigma, which
sells a low-purity version "recommended for use in aqueous solutions".
On heating this stuff, it dissolves, more or less, in water.  

Unfortunately Sigma is backordered on this until forever, and I really
want to get my experiments done.  I tried a much higher purity product
from Boehringer Mannheim, but it didn't dissolve in water even on
prolonged boiling, and when I tried using it anyway my results were
ireproducible at best. 

Does anyone know either another source for the aqueous digitonin, or how
to reliably and safely dissolve the high-purity stuff in water? 

Thanks for any suggestions.  

Ian 


-- 
    Ian York   (iayork at panix.com)  <http://www.panix.com/~iayork/>
    "-but as he was a York, I am rather inclined to suppose him a
     very respectable Man." -Jane Austen, The History of England