The chemical formula NH3 represents ammonia, a colorless gas with a pungent odor. It's not made from "products" in the way we typically think of products, but rather through a chemical reaction.

Here are some common ways to produce ammonia:

* Haber-Bosch Process: This industrial process is the most common way to produce ammonia. It combines nitrogen gas (N2) from the air and hydrogen gas (H2) obtained from natural gas or other sources at high pressure and temperature, with a catalyst.

* Reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)

* Biological Fixation: Some bacteria in soil and water can fix atmospheric nitrogen into ammonia. This is a crucial part of the nitrogen cycle.

* Hydrolysis of Nitrogen-Containing Compounds: Some chemical reactions, like the hydrolysis of urea (NH2)2CO, can produce ammonia.

So, while you wouldn't find "products" labeled as NH3, the building blocks or reactants used to create it are nitrogen and hydrogen.