It appears that I had the Orwo R09 formula sat on my laptop from 2 years ago, and misplaced it but couldn't translate "Benzosulifinian sodowy" from the Polish.

So the question is are Sodium benzenesulfonate and Benzosulifinian sodowy the same. The compound is in Patent's for a medical thermal imaging films as an anti oxidant, one made by a Rochester based company (not Kodak).

In general anti-oxidants are rare in B&W developers - except Champlin's formulae, the high sulphite level rules out many that are used in Colour developers.

Ian