6-Mercaptopyridine-3-carboxylic acid may be used in the following processes:Fabrication of nanowell based sensors for the detection of improvised explosive devices (IEDs).Functionalization of gold nanoparticles (AuNPs) for the highly sensitive and selective detection of Cd2+in colorimetric assay.Preparation of thiolated chitosans, which are thiolated biopolymers exhibiting mucoadhesive, enzyme inhibitory, and permeation enhancing properties.Synthesis of Zinc(II) coordination polymers.