I actually have some Ferric Ammonium EDTA as part of a two part bleach-fix for a commercial dip and dunk machine, but what could it be used for by itself? How would it react to B&W films/papers?
Originally Posted by Photo Engineer
It is very difficult to remove the sodium.
To make it you must start with the free acid of EDTA and add ammonia then add the iron salt, but then you end up with the negative ion associated with the iron and etc.
It is made commercially from Ferric Oxide powder, Ammonia gas, water and EDTA in a high pressure and high temperature vessel.