Hydroxy purified multi-walled carbon nanotubes are widely used in the field of nanotechnology due to their unique structural and electrical properties. They are commonly employed as reinforcing agents in composite materials, enhancing the mechanical strength, thermal stability, and electrical conductivity of polymers, metals, and ceramics. In electronics, these nanotubes are utilized in the fabrication of sensors, transistors, and conductive films, offering high performance and miniaturization. Additionally, their functionalized surface makes them suitable for biomedical applications, such as drug delivery systems, where they can target specific cells or tissues. They are also used in energy storage devices like batteries and supercapacitors, improving capacity and charge-discharge efficiency. In environmental applications, they serve as adsorbents for removing pollutants from water and air, leveraging their high surface area and reactivity.