Physical and chemical properties：
Copper pyrophosphate is a pale green powder. It is soluble in acids but insoluble in water, and can form complex double salts with potassium pyrophosphate or sodium pyrophosphate.
Applications：
Copper pyrophosphate is widely used in the electroplating industry for pyrophosphate copper plating, copper-tin alloy plating, etc. It is suitable for the copper underlayer of decorative protective layers and the local anti-carburizing coating of parts requiring carburizing. The main components of the pyrophosphate copper plating solution are copper pyrophosphate and potassium pyrophosphate. Copper pyrophosphate provides copper ions, and potassium pyrophosphate acts as a complexing agent to form the complex salt potassium copper pyrophosphate. In addition to forming a complex salt with copper, there is also a part of free potassium pyrophosphate in potassium pyrophosphate, which can stabilize the complex salt and improve the throwing power and covering power of the plating solution. When copper is plated on the copper pyrophosphate underlayer, the coating has a uniform color, regular, fine and dense crystal structure, and the plating solution is more stable and easy to maintain.
| Specifications | Electroplating Grade | High purity Grade | |
|---|---|---|---|
| Packing: | 25kg/bag, in woven or kraft paper bags with inner bag,or as customer's requirements. | ||
| Appearance | Pale blue powder or granule | Pale blue powder or granule | |
| Assay(Cu2P2O7·4H2O) % | ≥99 | ≥99.9 | |
| Cu % | ≥34 | ≥34 | |
| Fe % | ≤0.008 | ≤0.005 | |
| As % | ≤0.0005 | ≤0.0003 | |
| Heavy metal(as Pb) % | ≤0.005 | ≤0.001 | |
| Acid insoluble % | ≤0.1 | ≤0.05 | |
| Sulfate（SO4） % | ≤0.5 | ≤0.5 | |
Transportation conditions: It is strictly prohibited to mix and transport with oxidants, acids, edible chemicals, etc. During transportation, exposure to sunlight, rain, and high temperatures should be prevented. The vehicle should be cleaned after transportation. For road transportation, it shall follow the specified route. Air transportation: Copper pyrophosphate can be handled under ordinary cargo conditions.
Storage conditions: It should be stored in a cool and dry place. Attention should be paid to protecting it from sunlight, moisture and package damage. It is recommended to stack it on shelves or single-layer pallets.
Shelf life: Under the above storage and transportation conditions, the shelf life is 12 months.
