Description

Dibasic Lead Stearate is a specialized lead soap compound widely used as a heat stabilizer and lubricant in polymer processing. Its primary value lies in its ability to provide excellent thermal stability and processing characteristics to halogen-containing polymers, particularly PVC. This product is essential for manufacturers in the plastics and cable industries seeking to enhance the performance and longevity of their materials under high-temperature conditions. The compound is supplied as a fine, white powder and is identified by the CAS registry number 56189-09-4.

Application

• Primary Heat Stabilizer for PVC: Imparts long-term thermal stability in rigid and flexible polyvinyl chloride (PVC) formulations, preventing degradation during processing and in-service use.
• Wire and Cable Insulation: A critical component in PVC compounds used for electrical wire jacketing and insulation, where it ensures stability during extrusion and provides excellent electrical properties.
• Lubricant and Processing Aid: Acts as an internal/external lubricant in PVC and other polymer systems, improving melt flow, reducing sticking to equipment, and enhancing surface finish.
• Stabilizer-Lubricant for CPVC: Used in chlorinated polyvinyl chloride (CPVC) pipes and fittings for hot water distribution, where high-temperature resistance is paramount.
• Stabilizer for Other Halogenated Polymers: Finds application in stabilizing other polymers containing halogen atoms, contributing to their processing stability.
• Specialty Additive: Employed in certain sealant, coating, and specialty plastic compound formulations requiring specific stabilization and lubrication profiles.

Basic Information

Product Name	Dibasic Lead Stearate
CAS No.	56189-09-4
Molecular Formula	2PbO·Pb(C17H35COO)2 or C36H70O4Pb3
Molecular Weight	1220.8 g/mol (approx.)
Synonyms	Lead Stearate, Dibasic; Dibasic Lead Octadecanoate; Lead Hydroxystearate; Tribasic Lead Stearate (common industry name); Lead(2+) Stearate; PVC Heat Stabilizer D; Plumbous Stearate; TS-101 (trade name variant)
EINECS	260-072-6

Quality Control

Our Dibasic Lead Stearate is manufactured under strict quality control protocols to ensure batch-to-batch consistency and performance reliability. The product is tested against stringent in-house specifications that monitor key parameters such as lead oxide content, moisture, stearic acid content, and fineness. While typically supplied as an industrial-grade material, our quality system ensures it meets the demanding requirements of polymer processing. A Certificate of Analysis (COA) detailing specific test results is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in a low-humidity environment to prevent caking and maintain free-flowing properties. Keep away from incompatible materials such as strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	White fine powder
Identification (IR)	Conforms
Lead Oxide (PbO) Content	Contact for details
Moisture	≤ 1.0%
Fineness (200 mesh sieve residue)	≤ 0.5%
Acid Value	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.