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Specifications
| Assay (Pb): | 98.5% min |
| Water: | 1.0% max |
| Oil Absorption: | 8–16 |
| Acetic Acid Insoluble Substance: | 0.5% max |
Applications
1.1 Corrosion-Resistant Coatings and Pigments
Historically, basic lead carbonate was widely used as:
A white pigment in paints (known as "white lead")
A corrosion inhibitor for metal surfaces, particularly in marine or industrial environments
Though largely replaced by safer alternatives, it is still used in:
Specialty industrial coatings
Anticorrosive primers for iron and steel structures where regulatory restrictions permit
1.2 Lead-Based Stabilizers for PVC
In the plastics industry, lead(II) carbonate basic is a key ingredient in:
Heat stabilizers for polyvinyl chloride (PVC)
Used in rigid PVC applications like pipes, conduits, and cable insulation
It provides:
Thermal stability
Weather resistance
Extended service life of the polymer
1.3 Glass and Ceramic Manufacturing
Used as a source of lead oxide in the production of:
Lead crystal glass
High refractive index optical glass
Certain ceramic glazes
It imparts clarity, brilliance, and electrical properties to specialty glass products.
1.4 Radiation Shielding and Electronics
Lead-based compounds, including basic lead carbonate, are used in:
X-ray shielding materials
Lead-based ceramics for electronic components like varistors and capacitors
1.5 Specialty Chemical Synthesis
Serves as a precursor to other lead compounds, such as:
Lead acetate
Lead nitrate
Lead oxide (PbO)
These derivatives are used in pigments, catalysis, and laboratory reagents.
Benefits
2.1 Effective Heat Stabilizer
In PVC applications, it offers:
High thermal and UV stability
Processing flexibility during extrusion and molding
Protection from hydrochloric acid degradation of PVC at high temperatures
2.2 Strong Pigment and Coating Properties
As a pigment and anticorrosive agent, it provides:
Good opacity and whiteness
Durability in extreme conditions
Resistance to moisture and chemical corrosion
2.3 Functional Properties in Glass and Ceramics
Lead(II) carbonate basic contributes to:
Brilliance and smooth finish in ceramics
High density and optical clarity in glass
Thermal and dielectric properties in electronic ceramics
Conclusion
Lead(II) carbonate basic (CAS 1319-46-6) is an industrially significant compound with enduring utility in the manufacture of PVC stabilizers, specialty coatings, glass, and ceramics. Its thermal stability and anticorrosive properties make it especially valuable in harsh or high-performance applications. However, due to its well-documented toxicity and environmental hazards, its use is highly regulated and generally confined to controlled industrial environments. Proper handling, adherence to safety guidelines, and responsible waste disposal are essential for its continued use in modern materials manufacturing.
