Quote Originally Posted by Tom Hoskinson View Post
Pyrocat-HD, Moersch Tannol, PMK,WD2D, 510-PYR0, Prescysol, DiXactol, etc. are examples of commercially available staining and tanning developers.
"THE NEGATIVE SIDE OF PYRO DEVELOPERS

Staining developers have not been universally accepted by the photographic community for several reasons: 1) Pyrogallol is a very toxic chemical."

Source: http://unblinkingeye.com/Articles/PCat/pcat.html