Ron - 
We have done high iron diamine - but years ago.  Checking with the 
original reagent list, I find that we used both anhydrous and hydrated 
ferric chloride (FeCl3-6H20).  Both worked.  We adjusted the amount of 
hydrated ferric chloride to make up for the waters.  Yes, there is an 
exothermic reaction with the ferric chloride, but if you add it slowly to 
the water, with stirring, you should have no problem.

Cheryl Crowder, BA, HTL(ASCP)
Chief Technologist
Department of Pathobiological Sciences
School of Veterinary Medicine
Louisiana State University
Baton Rouge, LA #160#70803

(225) 578-9784
FAX #160#(225) 578-9720