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:

Electrical cable insulation materials: High-voltage/heat-resistant cable jackets and insulation layers: such as mining cables, marine cables, and industrial equipment power cables.

PVC rigid products:

Industrial pipes/sheets: Building drainage pipes, industrial ventilation ducts, chemical tank liners (non-potable water contact);

Injection-molded structural parts: Enclosures for electromechanical equipment, instrument panel brackets (must be fully enclosed and have no human contact);

Specialty products: PVC records, high-rigidity industrial components.

PVC Soft Products and Special Materials:

Industrial synthetic leather: cargo hold covers, equipment dust covers (not for clothing/furniture use); 

Foam materials and plastic adhesives: sealing gaskets, industrial coating substrates; 

Inflatable products: industrial buoys, collision-proof airbags (not for toys or sports equipment)

Lead-acid battery additives: positive lead paste

Industrial coatings and pigments:

Heavy-duty corrosion-resistant coatings: ship bottom paint, steel structure anti-rust primer (not surface topcoat)

Light-stable white pigment (C.I. Pigment White 2), used in machinery and equipment identification paint.

⚠️ 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)