Used in the synthesis of conductive polymers such as polypyrrole, which finds application in sensors, actuators, anti-corrosion coatings, and organic electronics including batteries, capacitors, flexible displays, and organic solar cells due to its electrochemical stability and conductivity.

Serves as a building block for complex structures like porphyrins and corrins, found in hemoglobin, chlorophyll, and vitamin B12, playing a key role in various biochemical processes.

Employed in the production of pharmaceuticals, including drugs with antitumor, antimicrobial, and anti-inflammatory properties.

Utilized in the preparation of dyes and pigments, especially for specialty inks and optical materials.

Also applied in coordination chemistry as a ligand for metal ions in catalytic systems and in organic synthesis for stable cyclic compounds with special electronic properties.