287 you had almost no knowledge of Benzene sulphonates
Now it's well known That's irrelevant, these are marginal chemical combinations in most uses. . . . . . . . .
What's important is that something else happens between PPD and Benzenesulphonates, it isn't just about helping PPD to dissolve, it's preventing oxidation as well.
The same inter-reaction is taking place with p-Aminophenol preventing or rather holding back oxidation.
There's an equilibrium complex involved, my extremely rusty Organic chmistry is returning, my Biochemistry was my strong point