Dibasic Lead Phosphite (CAS 12141-20-7): Comprehensive Technical Guide
Table of Contents
1. Product Overview & Specifications
| Parameter | Specification |
|---|---|
| Chemical Formula | HO5PPb3 |
| Molecular Weight | 733.58 g/mol |
| Appearance | White to yellowish microfine powder |
| Density | 6.1-6.94 g/cm³ |
| Refractive Index | 2.25 |
| Thermal Stability | Stable up to 200°C (discoloration at 450°C) |
| Solubility | Insoluble in water/organic solvents, soluble in mineral acids |
| CAS Number | 12141-20-7 |
| Hazard Class | 6.1 (Toxic Substances) |
2. Key Applications & Industrial Uses
Primary Functional Advantages:
- Superior thermal stabilization for PVC polymers
- UV radiation absorption capability (290-400 nm)
- Enhanced electrical insulation properties
- Oxidative degradation resistance
- Weathering protection for outdoor applications
Industrial Implementation:
- Wire & Cable: Primary stabilizer for outdoor PVC insulation (60-75% market share)
- Construction Materials: Corrugated sheets, pipes, window profiles
- Automotive Components: Under-hood wiring harnesses
- Synergistic Formulations: Combined with tribasic lead sulfate (3:1 ratio recommended)
3. Performance Advantages & Comparative Analysis
| Property | Dibasic Lead Phosphite | Conventional Stabilizers |
|---|---|---|
| Weather Resistance | 5,000+ hours QUV exposure | 2,000-3,000 hours |
| Thermal Stability | Maintained @ 180°C/45min | Degradation @ 160°C/30min |
| Volume Resistivity | 1×1014 Ω·cm | 5×1012 Ω·cm |
| Acid Scavenging | pH stabilization within ±0.2 | ±0.5 pH variation |
4. Implementation Case Studies
Case 1: High-Voltage Cable Manufacturer (Zhuhai, China)
- Application: 35kV XLPE insulated power cables
- Formulation: 2.5% Dibasic Lead Phosphite + 1% Tribasic Sulfate
- Result: 40% reduction in surface cracking after 8-year field deployment
Case 2: Building Material Producer (Hamburg, Germany)
- Application: PVC roofing membranes
- Loading: 4.2% in plastisol formulations
- Outcome: Extended service life from 12 to 18 years in maritime climates
5. Safety Protocols & Handling Guidelines
| Parameter | Requirement |
|---|---|
| PPE | NIOSH-approved respirator (P100 filters), chemical gloves |
| Storage | Dry environment (<40% RH), segregated from acids |
| Firefighting | Use alcohol-resistant foam (AR-AFFF) |
| Exposure Limit | 0.01 mg/m³ (TWA), 0.03 mg/m³ (STEL) |
6. Technical Inquiry & Ordering Information
For technical specifications sheets or customized formulations:
Email: info@vivalr.com
Tel: (86) 15866781826
Packaging Options:
- 25kg moisture-proof kraft bags
- 500kg palletized containers
- Customized batch quantities available
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