Calcium Oxide ( CaO) Nanopowder or Nanoparticles, nanodots or nanocrystals are ferric and ferrous spherical or faceted high surface area oxide magnetic nanostructure particles. Nanoscale Calcium Oxide Particles are typically 20-80 nanometers (nm) with specific surface area (SSA) in the 15 – 50 m 2 /g range and also available in with an average particle size of 100 nm range with a specific surface area of approximately 5 - 10 m 2 /g. Nano Calcium Oxide Particles are also available in ultra high purity and high purity, transparent, and coated and dispersed forms. Applications for Calcium Oxide Nanocrystals include as a possible flame retardant and in the clean up of toxic contamination from chemical warfare. Calcium Oxide Nano Particles are generally immediately available in most volumes.