It has to be kept in the refrigerator, and yes, it can be used several times.
  You can test how is working by adding a few drops of the Schiff's reagent to NBF, it it reacts quickly with a magenta color, is working OK, if not, discard it.
  René J.

Taben Hale  wrote:
  What is the shelf-life and stability of Schiff's reagent? Can it be used
multiple times?

-- 
Taben M Hale, PhD
Postdoctoral Fellow
Universite de Montreal
Dept Pharmacologie
(514)343-6111 ext. 4968
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