I have a question about m-Phenylenediamine.

Question

Is m-Phenylenediamine the same as m-Phenylenediamine hydrochloride?

I apparently have to use the latter for a chemical test but we only have a bottle that is labeled as the former.
Is it okay to use that and just dissolve it in water?

Thanks,
~christina~

Answer 1

No. The hydrochloride is the salt of the diamine. The diamine is a base and it can be neutralized by HCl to form the hydrochloride salt. Dissolving the diamine in water will give you the base whereas you want the salt. You can prepare the salt by dissolving the diamine in HCl. It will be 2 moles HCl to 1 mole of the diamine.

Answer 2

That's what I was thinking I should do but wasn't sure.

Thanks Dr.Bob

p.s. I hope you've been doing well since the last time I was here. :)