CAS No: 12069-32-8 ENINEC No: 235-111-5 MF: B4C Grade Standard:General Reagent, Electron Grade Purity:99% Appearance: Grey black Powder Application:nuclear materials, gun nozzles Size:500nm, 1-3um Quality: High Note: We can supply different size products of nano boron carbide b4c powder according to client's requirements.