Polyaniline (emeraldine salt) is widely used in the field of electronics due to its conductive properties. It is commonly employed in the fabrication of sensors, as it can detect various gases and chemicals, making it valuable for environmental monitoring and industrial safety. Additionally, it is utilized in anti-corrosive coatings to protect metals from degradation, extending the lifespan of structures and equipment. In energy storage, it serves as an active material in supercapacitors and batteries, enhancing their performance. Its application in smart textiles is also notable, where it is integrated into fabrics to create wearable electronics. Furthermore, it is used in electrochromic devices, such as smart windows, which change color or opacity in response to electrical stimuli.