Ammonia has the chemical formula NH3.
The Ammonium ion is converted into Urea in Most Terrestrial Vertabrates as is it toxic in the ionic form.
Ammonia can be formed from the Haber process. N2 + 3H2 ---> 2NH3 + Energy. This reaction is exothermic.
The conditions required are: 200ATM, 450oC-500oC and finely divided iron as the catalyst.