3-Hydrazinylpropan-1-ol dihydrochloride is primarily used in organic synthesis as a versatile building block for the preparation of various hydrazine derivatives. It serves as a key intermediate in the development of pharmaceuticals, particularly in the synthesis of compounds with potential therapeutic applications. The hydrazine moiety in its structure makes it valuable for creating hydrazone linkages, which are often utilized in the design of drug molecules targeting specific biological pathways.

In addition to pharmaceutical applications, it is employed in the synthesis of agrochemicals, where hydrazine derivatives play a role in the development of pesticides and herbicides. Its reactivity also makes it useful in materials science, particularly in the preparation of polymers and coatings with specialized properties. Furthermore, it is utilized in research laboratories as a reagent for the modification of biomolecules, aiding in the study of biochemical processes and the development of diagnostic tools. Its ability to form stable complexes with metal ions also finds applications in analytical chemistry for the detection and quantification of specific metal species.