Lead Monoxide

Lead(II) oxide, also called lead monoxide, is the inorganic compound with the molecular formula PbO. PbO occurs in two polymorphs: litharge having a tetragonal crystal structure, and massicot having an orthorhombic crystal structure. Modern applications for PbO are mostly in lead-based industrial glass and industrial ceramics, including computer components. It is an amphoteric oxide. Chemical Name:Lead monoxide Synonyms: LITHARGE, Massicot, Plumbous oxide, Galena Molecular Formula: PbO Molecular Weight:223.1994 Melting point 886 °C(lit.) Boiling point 1470 °C Density 9.53 vapor pressure 10 mm Hg ( 0 °C) refractive index 2.67 storage temp. Store below +30°C. solubility Soluble in concentrated alkali, HCl and ammonium chloride. Insoluble in dilute alkali and alcohol. form powder color yellow Specific Gravity 9.53 PH 8-9 (100g/l, H2O, 20?)(slurry) Water Solubility Soluble in concentrated alkali, hydrochloric acid, and ammonium chloride. Insoluble in water, dilute alkali and alcohol. Hydrolytic Sensitivity 4: no reaction with water under neutral conditions Merck 14,5413 Exposure limits ACGIH: TWA 0.05 mg/m3 NIOSH: IDLH 100 mg/m3; TWA 0.050 mg/m3 Stability Stable. Reacts violently with hydrogen peroxide, strong oxidizing agents, aluminium, zirconium, halogens, sulphur trioxide, boron, silicon, sodium, zinc.