Nano sized alumina occurs in the form of nearly spherical nanoparticles paste, and in the form of oriented or undirected fibers. Alumina is a versatile substance in many compounds which possess interesting utility in biology, industry, and drugs. Nano alumina have been utilized in different branches of industry, medicine, and biology. It could play key role in abrasives, ceramics, and dental composites, electronic, absorbent, nano-carriers for delivery of anticancer, and surgical implants. Besides, it possesses particular position, as a heterogeneous Lewis acid catalyst or catalyst support in chemistry.