Pyrocat?
I have a new one liter bottle of Kodak HC-110, made in Germany for the USA according to the label, expiry on 9/2014. Reading the leaflet glued to the bottle, not only is the stated capacity lower (4 rolls per liter dilution B while a previous Kodak data sheet says 5, for instance), but the ingredient list seems to be missing the Phenidone. If you read the English ingredient list for Europe on the inside, you will clearly see the word "pyrocatechol", as well as no mention of Phenidone. Does anyone have an old bottle to compare to? I thought HC-110 is a PQ type? I am sure I have seen that long chemical name for Phenidone listed on the old American made bottles.