Unnitrated
Unnitrated is a term used to describe a substance or compound that has not undergone nitration. Nitration is a chemical process that involves the introduction of a nitro group (-NO2) into a molecule. This reaction typically occurs when a substrate is treated with a nitrating agent, such as nitric acid, often in the presence of sulfuric acid as a catalyst. The resulting nitro compounds have a wide range of applications, including in explosives, dyes, pharmaceuticals, and fertilizers.
Therefore, something that is unnitrated has not had this specific functional group added to its chemical structure.