Polyaniline is widely used in the electronics and materials science industries due to its conductive and semiconducting properties. It is applied in the production of sensors for detecting gases, chemicals, humidity, and biological molecules, making it valuable in environmental monitoring, medical diagnostics, and other sensing applications.

Additionally, it is utilized in corrosion protection coatings for metals, providing a cost-effective and durable solution for extending the lifespan of materials in harsh environments.

Polyaniline is incorporated into energy storage devices such as supercapacitors and batteries, where its chemical stability and efficient energy storage and release are beneficial. It is also researched for use in solar cells to improve photovoltaic efficiency.

In the field of textiles, it is used to create conductive fabrics for smart clothing and wearable technology. Furthermore, its application in antistatic coatings helps prevent static electricity buildup in electronic components and packaging materials.

In environmental applications, polyaniline is employed in filtration and removal of water pollutants, effectively adsorbing toxins and heavy metals.