Carboxylic single-walled carbon nanotubes (SWCNTs-COOH) dispersion is widely used in nanotechnology and material science due to its unique properties. It serves as a reinforcing agent in composite materials, enhancing mechanical strength and electrical conductivity in polymers, ceramics, and metals. In electronics, it is applied in the development of flexible and transparent conductive films for touchscreens, sensors, and displays. The dispersion is also utilized in energy storage devices, such as supercapacitors and lithium-ion batteries, to improve electrode performance and charge capacity. In biomedical applications, it is employed for drug delivery systems, biosensors, and tissue engineering scaffolds due to its biocompatibility and functionalization potential. Additionally, it plays a role in environmental applications, including water purification and pollutant detection, by acting as an adsorbent or sensing material.