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Dibasic lead Phosphite
Product
name |
Dibasic lead Phosphite |
Structural
formula |
2PbO·PbHPO3·H2O |
Property |
| White or yellowish powder with sweet taste and toxicity, density: 6.1, refractive index:2.25. It is grey black when the temperature is under 200℃ and grey at 450°C. It is insoluble in water and all organic solvents, but soluble in hydrochloric acid, nitric acid. |
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Quality
standard |
In accordance with HG2339-92 |
| Item |
Lead content（based on PbO）% Ortho phosphorous acid（H3PO3）% |
Quality
index |
Item |
Top quality |
First quality |
Qualified product |
| Lead oxide % |
89.0-91.0 |
89.0-91.0 |
88.5-91.5 |
| Ortho phosphorous acid % |
10.0-12.0 |
10.0-12.0 |
9.0-12.0 |
| Heating loss % ≤ |
0.30 |
0.40 |
0.60 |
| Residue on sieve（75μm sieve）% ≤ |
0.30 |
0.40 |
0.80 |
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Use |
| Heat stabilizer for PVC and PVC/polyethylene copolymer. Mainly used in opaque hard and soft products. |
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