Quote Originally Posted by Relayer View Post
Ian, check again ))

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

so my formula is correct

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

I repeat Rodinal does not contain p-aminophenol hydrochloride, so that's not the correct formula, it has no chloride of any form.

If you start with the Hydrochloride first you precipitate and collect the free base. There's many descriptions on how to do this in books.