Propylhydrazine oxalate salt is primarily utilized in organic synthesis as a reagent for the preparation of various hydrazine derivatives. It plays a significant role in the synthesis of pharmaceuticals, particularly in the development of drugs that target the central nervous system. The compound is also employed in the production of agrochemicals, where it serves as an intermediate in the creation of herbicides and pesticides. Additionally, it finds application in the field of material science, contributing to the development of polymers and coatings with specialized properties. Its reactivity with carbonyl compounds makes it valuable in the formation of hydrazones, which are useful in analytical chemistry for the detection and quantification of aldehydes and ketones.