Lead(II,IV) oxide
General Product Information
| Article | Lead(II,IV) oxide |
| Synonyms | Lead tetroxide, Minium, Red lead, Triplumbic tetroxide, C.I. Pigment Red 105 |
| CAS No. | 1314-41-6 |
| EEG No. | 082-001-00-6 |
| EINECS No. | 215-235-6 |
| IMO | Class 6.1 |
| Tariff Code | 28249000 |
| UN No. | 2291 |
| VLG/ADR | Class 6.1, Packing Group III |
Description
Lead(II,IV) oxide, also known as red lead, is a bright red-orange inorganic pigment composed of a combination of lead in two oxidation states: Pb²⁺ and Pb⁴⁺.
It has the chemical formula Pb3O4 and is used industrially because of its excellent anti-corrosion properties, high Density and stability.
Characteristics
- Odor: Odorless.
- Hygroscopic: –
- Color: Red-orange.
- Grade: Technical.
- Solubility: Insoluble in water; soluble in acids.
- Shape: Crystalline powder.
Physical & Chemical Properties
| Chemical Structure | Pb3O4 |
| Molar Weight | 685.6 g/mol |
| Melting Point | 500 °C (decomposes) |
| Boiling Point | – |
| Density | 9.1 g/cm³ |
| Refractive Index | – |
| pH | – |
Applications
Lead(II,IV) oxide is applied in various ways, for instance:
1. Glass production
It is used in the production of lead glass (for example, for radiation shielding glass) to improve its optical and physical properties.
2. Ceramics & enamel
In ceramic industries, it is used as a glazing agent and as a dye in glazes.
3. Anti-corrosion coatings
Lead(II,IV) oxide is used as a pigment in industrial primers to protect steel structures from corrosion, especially in marine applications, bridges and heavy plant.
4. Batteries
In some lead-acid batteries, it is used in the electrode formulation, although this is less common in modern Applications.
Interessing Links
- CAS Common Chemistry – Lead oxide
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- PubChem – Lead tetroxide – Chemical information by the Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Lead(II,IV) oxide