Note: if you use p-aminophenol hydrochloride, you will need about twice as much NaOH. For every mole of p-aminophenol.HCl you will need one mole of NaOH to neutralize the HCl and a little less than one more mole to make the sodium aminophenolate salt, leaving some aminphenol base precipitated. This solution will contain some sodium chloride, but I doubt it will make much difference in performance or grain size.