Reaction of benzaldehyde with phenylhydrazine

Oh wow, it's really been a long time since i blogged about anything. Anyway, I just finally finished my final exams for my 2nd semester! Hopefully i did well :(

So for this time i will be blogging about a simple experiment i did last time. Might be useful for chemistry students and pharmacy students alike. Sorry for the boring stuff. XD

Long story short, benzaldehyde was reacted with phenylhydrazine to form a phenylhydrazone ( a yellow colored product). The product is then dried on a watch glass over a beaker of boiling water. This method is not suitable if the melting point of the product is lower than the boiling point of water or if the product is hygroscopic. :D

Anyway, some pictures of the experiment as usual:

First prepare a conical flask.

Add in the reactants and shake it hard! The yellow product will soon form.

Filter the product with a vacuum pump and dry it with the method above.

Your final product!! looks like cotton candy to me.

That's all for today! :D

All shots were taken with Sony TX10.