Overview
Lead carbonate basic, commonly known as white lead, is a chemical compound with the formula 2PbCO3·Pb(OH)2. It has been historically significant as a pigment in paints and cosmetics due to its high opacity and durability. However, its use has declined significantly due to the discovery of its toxicity. Despite its toxicity, lead carbonate basic remains relevant in certain industrial applications, particularly in specialized ceramics and as a stabilizer in some plastics. Its production is now strictly regulated in many countries to minimize environmental and health risks.
Physical and Chemical Properties
Lead carbonate basic is a white crystalline powder with a density of 6.14 g/cm³. It is insoluble in water but dissolves in acids, forming lead salts. The compound decomposes at around 400°C, releasing carbon dioxide and water vapor. Its key chemical property is its reaction with acids to form soluble lead compounds, which is why it must be stored away from acidic environments. The compound's high opacity made it a popular pigment in the past, though its toxicity has led to the development of safer alternatives.
Main Applications
Historically, lead carbonate basic was widely used in white paints, particularly for artists' paints and house paints. Its opacity and durability made it a preferred choice until the 20th century. It was also used in cosmetics, such as face powders, though this practice has been discontinued due to health concerns. Today, its applications are limited to specialized industrial uses, such as in certain ceramic glazes and as a stabilizer in PVC plastics. Its use is heavily regulated, and alternatives are recommended where possible to reduce lead exposure risks.
Safety and Storage
Lead carbonate basic is highly toxic if ingested or inhaled, and prolonged exposure can lead to lead poisoning. Proper handling requires protective equipment, including gloves, masks, and ventilation systems to prevent inhalation of dust. Storage should be in a cool, dry place, away from acids and moisture to prevent decomposition or reaction. Containers must be clearly labeled with hazard warnings, and disposal must comply with local regulations for toxic substances.
B2B Procurement Guide
When procuring lead carbonate basic, buyers should prioritize suppliers who adhere to strict safety and environmental regulations. Verify the supplier's certifications and ensure proper labeling and Material Safety Data Sheets (MSDS) are provided. Pricing varies based on purity and quantity, with reference prices ranging from $10 to $30 per kg. Buyers should also consider the logistics of handling and transporting this hazardous material, ensuring compliance with all relevant safety protocols.
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