Technical Specifications and Industrial Applications of Lead Trisulfate

📌 Product Overview

Chemical formula: 3PbO·PbSO₄·H₂O | CAS number: 12202-17-4

Form: White microfine powder

Core characteristics:

▶️ High temperature stability: Withstands processing temperatures above 200°C (gradually loses crystalline water when overheated)

▶️ Electrical insulation: Optimized for cable insulation materials

▶️ Environmental Resistance: Stable under dry, light-protected conditions (prone to decomposition and discoloration in humid, light-exposed environments)

💡 Replaces organic stabilizers in PVC cable compounds and rigid pipes, reducing the risk of leaching and extending product lifespan.

⚖️ Key Specification Parameters  

Standards: Chinese Chemical Industry Standard HG2340-92 (divided into premium grade/first grade/qualified grade)  

Core Indicators:

Lead Content (calculated as PbO): Premium grade/first grade 88.0%–90.0%, qualified grade 87.5%–90.5%

Sulfur Trioxide (SO₃): Premium Grade/First Grade 7.5%–8.5%, Standard Grade 7.0%–9.0%

Loss on Heating: Premium Grade ≤0.30%, First Grade ≤0.40%, Standard Grade ≤0.60%

Residue on 75 μm sieve: Premium grade ≤0.30%, First grade ≤0.40%, Standard grade ≤0.80%

Basic physical properties: Density 7.1 g/cm³ | Melting point 820°C | Sparingly soluble in water, soluble in hot ammonium acetate/alkali solutions

🧪Application Scenarios

Suitable Fields:

Hard PVC: Building pipes, door and window frames, injection molded parts

Soft PVC: Artificial leather, waterproofing membranes

Cable Materials: Insulation layers (used in conjunction with lead dibasic phosphite)

Specialty Coatings: Light-stable pigments

⚠️ Prohibited Scenarios:

① Transparent products (affects light transmittance)

② Food/pharmaceutical contact materials (lead migration risk)

📦 Packaging and Storage

Packaging Specifications:

Double-layer protection: Food-grade polyethylene inner bag + laminated woven bag/cardboard drum

Standard unit: 25kg/bag

Storage and Transportation Conditions:

Cool environment | Humidity ≤50% | Light-proof and moisture-proof | Keep away from acid and alkali sources | Stack height ≤3 layers 

Shelf Life: 24 months (must be sealed after opening and used within 6 months)