Phosphoric acid vs. Orthophosphoric?

dr.kiuchi

In the ingredient wiki for phosphoric acid it says that the formula listed actually refers to orthophosphoric. (H3PO4) Is there a reason why the purchase link is to one vs. the other? Are they readily interchangeable? I'm curious as I don't think I would require an entire liter of the ingredient when creating carbonated juice drinks at home.

Recommended link from Chefsteps:

http://www.amazon.com/gp/product/B009S05Z2Q/?tag=delvkitc-20

Ortho link on amazon:

http://www.amazon.com/Progressive-Laboratories-Orthophosphoric-Acid-Ounces/dp/B000S822KK

Thanks!

Chris_Young_80640

They are the same. The easiest way to figure out if two chemicals like phosphoric acid and orthophosphoric acid are the same is to look at the CAS number for both, which is 7664-38-2 in this particular case.

Sadly, it's hard to purchase smaller quantities of phosphoric acid in my experience.