Short carboxyl purified multi-walled carbon nanotubes are widely used in various advanced applications due to their unique properties. They are commonly employed as reinforcing agents in composite materials, enhancing mechanical strength, electrical conductivity, and thermal stability in polymers, metals, and ceramics. In the field of electronics, they are utilized in the development of conductive films, sensors, and flexible electronic devices. Their high surface area and functional groups make them suitable for use in energy storage systems, such as supercapacitors and lithium-ion batteries, where they improve electrode performance. Additionally, they are integrated into biomedical applications, including drug delivery systems and biosensors, due to their ability to interact with biological molecules. In environmental applications, they are used for water purification and pollutant adsorption, leveraging their high adsorption capacity and chemical reactivity. These nanotubes also play a role in catalysis, where they serve as supports for catalytic nanoparticles, improving reaction efficiency in chemical processes.