Toxic or highly toxic is a no question. Original Rodinal was never mild... hidroxides are highly corrosive, the developing agent is toxic and bromides added (not present in the original formula) are also poisonous. Things were added and removed from the formula several times but the poisonous or toxic nature of the concentrate was constant! The generic brands of rodinal work all well, but when when i now see some red tint on the concentrate and a lot of cristals (too much cristals) i throw away and open a new bottle. PC-TEA never failed me though...
The darkening of the leader of the film is a good test as the failures i had were complete!
cheers!
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