Looking at the Sodium Benzenesulfonate further it's use is given in at least 4 Fuji Patents as an anti-oxidant, alongside other examples such as Suphites or Metabisulphites themselves and Ascorbic acid. It's also used in photothermography by some US companies..
If Agfa did or do still use it then it's possible that anyone trying to analyse Rodinal might think Sodium Benzesulfonate or another similar anti-oxidant was an unidentifiable fevloping agent. Ilford patented some anti-oxidants in the 1950's presumably for use in Ilfosol originally a Phenidone/Glycin based developer, and these can also be used to form developing agents. (4-aryl-2-oxytetronimic acids).
So thanks that's useful information.
Originally Posted by pavelt2tk0