Sciencemadness Discussion Board

Phosphoric Acid anhydrous and others

ItsAChitzen - 3-7-2012 at 06:56

Self explanatory, I think. I am trying to find some crystalline phosphoric acid, but no dice. I have found some on Sigma, but I am fairly cranky about the price.

Also, any used glassware for sale would be greatly appreciated.

DJF90 - 3-7-2012 at 13:31

If you have the requisite equipment, it can be made from ordinary 85% stuff by evaporation. The preparation is in Brauer.

kristofvagyok - 3-7-2012 at 15:04

It's better to buy some P4O10 and make it yourself.

I have worked previously with some polyphosphoric acid what was exactly like honey, except that after it my lab coat looked like after a war.

The problem with crystalline and highly concentrated phosphoric acids, that they absorb water too fast and if you are not lucky, then the crystalline H3PO4 will turn into a viscose oil. Even if it absorbs traces of water it's melting point (circa 40Celsius as I remember) will go down to 20-10-0.

ItsAChitzen - 6-7-2012 at 12:10

Ok guys, thanks for the input. I think that I can deal from here.