Ammonia

Ammonia has the chemical formula NH_3. 

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, 450^oC-500^oC and finely divided iron as the catalyst.