In support of Ian here is an old formula for Rodinal. This is the formula which was collected from the Agfa Wolfen plant in 1945.

Distilled water ………………………………………………………………… 340 l
Paraminophenol …………………………………………………………………… 34 kg
Potassium sulfite, 30% w/w at 55C ……………… 558 kg
Potassium hydroxide, 34% w/w………………………………… 50 kg
Potassium bromide ………………………………………………………… 5.52 kg
Agfa P.1347 antifoggant …………………………………………… 42 g

As you can see the free base was used NOT the hydrochloride salt.