On Mon, 22 Jan 2001, Cathy Gorrie wrote:

> I still use bleach!!! I hadn't heard it still leaves DAB mutagenic!!!

So does nearly everyone else, but acid permanganate brings about
a more complete oxidation and is the approved method in textbooks
of lab safety. It's a matter of complying with laws and other
regulations more than one of common sense, unfortunately.

There was much correspondence about this on Histonet about 
2 years ago, which should be recorded in the archives at:
www.histosearch.com. Some of this is abstracted in an FAQ
at: publish.uwo.ca/~jkiernan/faqlist.htm#MISCE

 John A. Kiernan,
 Department of Anatomy & Cell Biology,
 The University of Western Ontario,
 LONDON,  Canada  N6A 5C1