Lead(II) oxide, also called lead monoxide, is the inorganic compound with the molecular formula PbO. PbO occurs in two polymorphs, one litharge having a tetragonal crystal structure and the other massicot having an orthorhombic crystal structure
L 3036 (OTTO) Lead monoxide powder, <10 μm, ≥99.9% trace metals basis Cas 1317-36-8 - used in cathode ray tube glass to block X-ray emission, but mainly in the neck and funnel because it can cause discoloration when used in the face plate.