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Dibasic Lead Phosphite
Molecular formula: 2PbO · PbHPO3 ·1/2 H2O
Molecular weight: 742.57
Property: It is slight white, sweet and toxic powder with the specific gravity of 6.94. It can dissolve in hydrochloric acid, and nitric acid, but not in water. It will turns to gray & black at 200℃, it turns to yellow at 450℃, and it has good deductibility. It is antioxidant; it has the excellent performance of resistance to ultraviolet ray, cold, and ageing.
Application: Mainly used for the heat stabilizer of PVC opaque products because of good insulation, weatherablity and ultraviolet radiation absorbency.
Package: Plastic weaved bag, lined with PE bag, and 25Kg weight.
Storage: It is toxic inorganic product, so it should be kept in a dry and cool storage house with good ventilation, and cannot be stored or transported with food.
Product quality
Index |
Best quality |
Appearance |
White powder without evident mechanical impurity |
Lead oxide (PbO), % |
90.0±1.0 |
Phosphorous acid (H3PO3),% |
11.0±1.0 |
Heating loss, % ≤ |
0.30 |
Fineness(0.075 mesh), % ≥ |
99.70 |
Whiteness, % ≥ |
90.0 |
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