Lead(II) oxide
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Lead(II) oxide, also "Plumbous oxide" or litharge, is a toxic yellow oxide of lead of formula PbO, created by heating lead in air. It can also be formed by heating lead(II) nitrate(V) (Pb(NO3)2). The distorted litharge crystal structure illustrates the presence of a stereochemically active Pb(II) lone pair. It is used in the manufacture of paints and in glass, as well as in vulcanization. A mixture with glycerine sets to a hard, waterproof cement that has been used to join the flat glass sides and bottoms of aquaria Ref: [
Lead(II) oxide is 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 faceplate. Strontium oxide is preferred for the faceplate.
Litharge is amphoteric, meaning it reacts with acids to form Pb2+ and with bases to form plumbite(II).
[edit] External links
- Case Studies in Environmental Medicine - Lead Toxicity
- ToxFAQs™: Lead
- National Pollutant Inventory - Lead and Lead Compounds Fact Sheet
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