Description

Lead Phosphite, Dibasic is an inorganic compound primarily valued for its role as a heat and light stabilizer in polymer systems. Its effectiveness in scavenging free radicals and decomposing peroxides makes it a critical additive for extending the service life of various materials. This product is essential for manufacturers in the plastics, coatings, and specialty chemical industries seeking to enhance the durability and performance of their formulations under demanding environmental conditions.

Application

• Primary Stabilizer for PVC: Used extensively in flexible and rigid polyvinyl chloride (PVC) formulations to prevent thermal degradation and discoloration during processing and end-use.
• Synergistic Co-stabilizer: Often employed in combination with other metal soaps (e.g., calcium/zinc) or organic co-stabilizers to improve overall stabilization efficiency and cost-performance.
• Stabilizer for Other Polymers: Provides stabilization benefits in chlorinated polymers, polyolefins, and other halogen-containing plastics susceptible to dehydrohalogenation.
• Lubricant and Processing Aid: Imparts lubricating properties in PVC compounds, aiding in melt flow and processing.
• Corrosion Inhibitor Precursor: Serves as a raw material in the synthesis of pigments and corrosion-inhibiting coatings for metals.
• Specialty Chemical Intermediate: Used in the manufacture of other lead salts and for specific catalytic or electronic applications.

Basic Information

Product Name	Lead Phosphite, Dibasic
CAS No.	12141-20-7
Molecular Formula	2PbO · PbHPO3 · ½H2O (Common representation) / Pb3O2(HPO3) · H2O
Molecular Weight	742.57 g/mol (for Pb3O2(HPO3) · H2O)
Synonyms	Dibasic Lead Phosphite; Lead Hydrogen Phosphite; Trilead Bis(orthophosphate) Hemihydrate; Tribasic Lead Phosphite (common industry name); 2PbO·PbHPO3·1/2H2O; PVC Heat Stabilizer; Plumbous Phosphite; Stabilizer T; NSC 84225
EINECS	235-252-2

Quality Control

Our Lead Phosphite, Dibasic is manufactured under strict process controls to ensure batch-to-batch consistency and high performance. Quality is verified through a comprehensive suite of analytical tests, including assay, moisture content, and particle size distribution. While produced to standard industrial grade specifications, compliance with relevant regional regulations concerning heavy metal stabilizers is a key focus. A Certificate of Analysis (COA) detailing specific lot results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Due to its light-sensitive and easily oxidized nature (store under inert atmosphere), prolonged exposure to air and light should be minimized to preserve efficacy. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	White to yellowish white powder
Identification (IR)	Conforms
Assay (as Pb3O2(HPO3)·H2O)	≥ 98.0 %
Moisture Content	≤ 0.5 %
Lead Oxide (PbO) Content	Contact for details
Particle Size (325 mesh residue)	≤ 1.0 %
Bulk Density	Contact for details

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