Ammonium nitrate is a quest item. It is used in The Dig Site quest along with nitroglycerin, ground charcoal, and arcenia root to make a chemical compound. It is obtained by using the chest key to open the chest near the panning point, and is brought to the archaeological expert, who identifies it as ammonium nitrate.
Before the archaeological expert identifies it, ammonium nitrate is known as chemical powder.
- Ammonium nitrate is used in some explosives with nitroglycerin. These are often referred to as ammonium dynamites.
- Ammonium nitrate is also used as fertiliser.