Lead oxide , 99.995%metalsbasis , 1309-60-0

Synonym(s):
Lead (su)peroxide;Lead dioxide;Lead peroxide

CAS NO.：1309-60-0

Empirical Formula: O2Pb

Molecular Weight: 239.2

MDL number: MFCD00011165

EINECS: 215-174-5

PRODUCT Properties

• Melting point: 290 °C
• Density: 9,38 g/cm³
• form: Powder
• Specific Gravity: 9.38
• color: Brown to black
• Water Solubility: Insoluble
• Merck: 14,5407
• crystal system: Nogata
• Space group: Pbcn
• Lattice constant:
  • a/nm: 0.4948
  • b/nm: 0.5951
  • c/nm: 0.5497
  • α/o: 90
  • β/o: 90
  • γ/o: 90
  • V/nm3: 0.1619
• Exposure limits: ACGIH: TWA 0.05 mg/m3; NIOSH: IDLH 100 mg/m3; TWA 0.050 mg/m3

Description and Uses

Lead dioxide, PbO₂, also plumbic oxide, is an odorless dark-brown crystalline powder which is nearly insoluble in water. It exists in two crystalline forms. The a phase has orthorhombic symmetry, lattice constants a=0.497 nm, b=0.596 nm, c= 0.544 nm, Z=4 (four formula units per unit cell).

Lead dioxide occurs in nature as the mineral plattnerite. It is used as an oxidizing agent in manufacturing dyes and intermediates. It also is used as a source of oxygen in matches, pyrotechnics, and explosives. In matches, the oxide is combined with amorphous phosphorus as an ignition surface. It also is used in making lead pigments, liquid polysulfide polymers and rubber substitutes. Lead dioxide electrodes are used in lead storage batteries in which lead dioxide accumulates on positive plates.

Safety

• Symbol(GHS): GHS03,GHS07,GHS08,GHS09
• Signal word: Danger
• Hazard statements: H272-H302+H332-H360D-H373-H410
• Precautionary statements: P202-P210-P273-P301+P312-P304+P340+P312-P308+P313
• Hazard Codes: O,T,N
• Risk Statements: 61-8-20/22-33-50/53-62
• Safety Statements: 53-45-60-61
• RIDADR: UN 1872 5.1/PG 3
• WGK Germany: 3
• RTECS: OG0700000
• TSCA: Yes
• HazardClass: 5.1
• PackingGroup: III
• HS Code: 28249090
• Toxicity: LD50 i.p. in guinea pigs: 220 mg/kg (Venugopal, Luckey)