Physical and chemical properties：
White crystal or amorphous powder. It has a relative density of 4.009 (at 16.4℃). It is insoluble in water but soluble in concentrated acids, and has strong corrosiveness. The dust irritates the eyes and respiratory tract, and corrodes the nasal septum; direct contact with the skin and eyes can cause burns; accidental ingestion can cause digestive tract burns, mucosal erosion, bleeding and shock.
Applications:
Electroplating-grade stannous pyrophosphate is mainly used for tin plating in cyanide-free electroplating. It is used as a filler in toothpaste, where it dissociates slightly and has a certain effect on preventing dental diseases. In the printing and dyeing industry, it is used for dyeing; in the ceramic industry, it is used for refining clay. In the coating industry, proper addition can slow down the sedimentation rate of paint fillers in paint and improve paint performance.
| Specificatioms | Electroplating Grade | |
|---|---|---|
| Packing: | 25kg/drum, in plastic or iron drums with inner bag,or as customer's requirements. | |
| Appearance | White powder or granule | |
| Assay(Sn2P2O7) % | ≥99 | |
| Sn % | ≥57 | |
| Fe % | ≤0.005 | |
| As % | ≤0.001 | |
| Pb % | ≤0.002 | |
| Acid insolubie% | ≤0.1 | |
| Loss in ignition % | ≤1.0 | |
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:Stannous 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.
