| Name | Tin (II) pyrophosphate |
| Synonyms | Stannous pyrophosphate Tin ii pyrophosphate ditin(2+) diphosphate |
| CAS | 15578-26-4 |
| EINECS | 239-635-5 |
| InChI | InChI=1/H4O7P2.2Sn.8H/c1-8(2,3)7-9(4,5)6;;;;;;;;;;/h(H2,1,2,3)(H2,4,5,6);;;;;;;;;;/q;2*+2;;;;;;;;/p-4/rH4O7P2.2H4Sn/c1-8(2,3)7-9(4,5)6;;/h(H2,1,2,3)(H2,4,5,6);2*1H4/q;2*+2/p-4 |
| Molecular Formula | H4O7P2Sn2 |
| Molar Mass | 415.395 g/mol |
| Melting Point | 62℃ |
| Physical and Chemical Properties | White crystalline or crystalline powder. Slightly chlorine odor. melting point 62 ℃ soluble in water, its aqueous solution is alkaline. |
| Use | Mainly used for non-cyanide plating (tin), toothpaste filler, Clay refining, etc |
White crystalline or amorphous powder. Relative density 4. 009(16.4 ℃). Insoluble in water, soluble in concentrated acid.
double decomposition method: first, stannous chloride and sodium pyrophosphate were dissolved in water, and an appropriate amount of activated carbon was added to decolorize and filter to obtain a detergent solution. The two solutions were then adjusted to a certain concentration by adding water, respectively. The sodium pyrophosphate solution was first added to the reactor, and the stannous chloride solution was slowly added under stirring for metathesis reaction. The end point of the reaction was controlled so as not to cause an excess of stannous chloride. A tin pyrophosphate precipitate was generated, and the supernatant was removed by standing, water was added and washed with stirring. The precipitate was then left to stand, and the supernatant was removed by repeating several times to remove most of the sodium chloride. The precipitate was then placed in a centrifugal separator for dehydration, washed with clean water until chloride ions were absent, and dried to obtain a finished tin pyrophosphate.
tin plating is mainly used for cyanide-free electroplating. As a toothpaste filler, there is a slight dissociation in the toothpaste, which has a certain effect on the prevention of dental diseases. Printing and dyeing industry for dyeing, ceramic industry for refined clay. Appropriate addition in the coating industry can alleviate the settling rate of the paint filler in the paint and improve the paint performance.
an iron drum packed with polyethylene plastic bags. 50kg net weight per barrel. Should be stored in a ventilated, dry warehouse. Containers must be sealed and cannot be co-stored with acids. Protection against rain, damp and sun exposure during transport. When loading and unloading should be light to prevent packaging damage. In case of fire, it can be suppressed by water, sand and all kinds of fire extinguishing.