I wonder if someone might be confusing this with the accelerator used ahead of persulfate bleaches. (Persulfates are powerful oxidizers, but they are normally slow. You can add things to them or ahead of them to speed up the process.) I'm not acquainted with the Hunt products, but they may also fall into this category.
Originally Posted by Photo Engineer
Neither C-41 nor E6 use persulfate bleaches. In any event, the persulfate (and I might add, the quinone) bleach(es) are either colorless or light green, the latter have a strong odor. The green color of bleach III (C-41) comes from the Ferric Ammonium NTA complex in it.