Stannous Pyrophosphate
Title: Stannous Pyrophosphate
CAS Registry Number: 15578-26-4
CAS Name: Diphosphoric acid tin(2+) salt (1:2)
Additional Names: ditin diphosphate; ditin pyrophosphate
Molecular Formula: O7P2Sn2
Molecular Weight: 411.36
Percent Composition: O 27.23%, P 15.06%, Sn 57.72%
Line Formula: Sn2P2O7
Literature References: Prepd by thermal dehydration of stannous hydrogen phosphate: Jablczynski, Wieckowski, Z. Anorg. Allg. Chem. 152, 207 (1926); from Na2H2P2O7 and SnCl2: Klement, Haselbeck, Ber. 96, 1022 (1958); from pyrophosphoric acid and stannous chloride: Nelson, US 3401012 (1968 to Monsanto). Clinical application for labelling red blood cells: D. Ducasson et al., Br. J. Radiol. 49, 344 (1976). Chemical characterization of technetium complexes: J. Kroesbergen et al., Nucl. Med. Biol. 15, 209 (1988). Diagnostic application in bone scanning: N. S. Anderton et al., Am. J. Roentgenol. Radium Ther. Nucl. Med. 124, 625 (1975); in myocardial infarction: D. E. Jansen et al., Circulation 75, 611 (1987).
Properties: Amorphous powder. d16.4 4.009. Insol in water. Sol in concd acid, excess alkali.
Density: d16.4 4.009
Derivative Type: 99mTechnetium complex
Additional Names: 99mTc-PPi; 99mTc-PYP
Trademarks: TechneScan PYP (Mallinckrodt)
Use: Ingredient in caries-preventing toothpaste: Norris, Schweizer, US 2946725 (1960 to Proctor & Gamble).
Therap-Cat: 99mTc complex as diagnostic aid (radioactive imaging agent).

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