Lead dioxide
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Lead(IV) oxide, commonly known as lead dioxide, is an inorganic compound with the chemical formula PbO2. It is an oxide where lead is in an oxidation state of +4.[1] It is a dark-brown solid which is insoluble in water.[2] It exists in two crystalline forms. It has several important applications in electrochemistry, in particular as the positive plate of lead acid batteries.
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Lead(IV) oxide | |
Other names
Plumbic oxide Plattnerite | |
Identifiers | |
ChemSpider | |
ECHA InfoCard | 100.013.795 |
EC Number |
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PubChem CID |
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RTECS number |
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UNII | |
UN number | 1872 |
CompTox Dashboard (EPA) |
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Properties | |
PbO2 | |
Molar mass | 239.1988 g/mol |
Appearance | dark-brown, black powder |
Density | 9.38 g/cm3 |
Melting point | 290 °C (554 °F; 563 K) decomposes |
insoluble | |
Solubility | soluble in acetic acid insoluble in alcohol |
Refractive index (nD) |
2.3 |
Structure | |
hexagonal | |
Hazards | |
GHS labelling: | |
Danger | |
H272, H302, H332, H360, H372, H373, H410 | |
P201, P202, P210, P220, P221, P260, P261, P264, P270, P271, P273, P280, P281, P301+P312, P304+P312, P304+P340, P308+P313, P312, P314, P330, P370+P378, P391, P405, P501 | |
NFPA 704 (fire diamond) | |
Flash point | Non-flammable |
Safety data sheet (SDS) | External MSDS |
Related compounds | |
Other cations |
Carbon dioxide Silicon dioxide Germanium dioxide Tin dioxide |
Lead(II) oxide Lead(II,IV) oxide | |
Related compounds |
Thallium(III) oxide Bismuth(III) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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