Quote Originally Posted by Ian Grant View Post
Rodinal cannot be made from p-amino phenol hydrochloride, it has to be the free base. This can be made first from the hydrochloride. So the formula you quote is wrong.
Ian, check again ))

C6H4OHNH2.HCl + NaOH = C6H4OHNH2 + NaCl + H2O
C6H4OHNH2 + NaOH = C6H4ONaNH2 + H2O

so my formula is correct

C6H4OHNH2.HCl + 2NaOH = C6H4ONaNH2 + NaCl + 2H2O