Stannous pyrophosphate
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Stannous pyrophosphate
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CAS No:
15578-26-4
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Formula:
H4O7P2.2Sn
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Chemical Name:
Stannous pyrophosphate
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Synonyms:
Diphosphoric acid,tin(2+) salt (1:2);Pyrophosphoric acid,tin(2+) salt (1:2);Tin pyrophosphate (Sn2P2O7);Stannous pyrophosphate;Tin(2+) pyrophosphate;Tin(II) pyrophosphate;Tin phosphate (Sn2(P2O7));69679-28-3;167994-36-7
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CAS No:
Characteristics
136
0.17960
Powder
4.01 g/cm3
>400 °C (decomp)
Insoluble in water.
Keep container tightly sealed. Store in cool, dry conditions in well sealed containers.
Safety Information
UN 1206 3/PG 2
2
36/37/38
26-37/39
JL6737500
Xi
Decomposition will not occur if used and stored according to specifications.
P305 + P351 + P338
H315-H319-H335
|Warning|H315 (92.31%): Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, and P501|Aggregated GHS information provided by 52 companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|Danger|H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]|P260, P261, P264, P270, P271, P280, P304+P340, P305+P351+P338, P312, P314, P337+P313, P403+P233, P405, and P501|P260, P264, P270, P280, P305+P351+P338, P314, P337+P313, and P501
Stannous pyrophosphate Use and Manufacturing
In the double decomposition method, stannous chloride and sodium pyrophosphate are respectively dissolved in water, and an appropriate amount of activated carbon is added for decolorization and filtration to obtain a clean solution. Then adjust the two solutions 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 with stirring to carry out the metathesis reaction. Control the end point of the reaction without excessive stannous chloride. A tin pyrophosphate precipitate is formed. After standing, the supernatant is removed, water is added and washed with stirring, and then the precipitate is left to stand, the supernatant is removed and repeated several times to remove most of the sodium chloride. Then put the precipitate into a centrifugal separator for dehydration, and wash it with clean water until it is free of chloride ions, and dry it to obtain a finished product of tin pyrophosphate. Its Na4P2O7+2SnCl2→Sn2P2O7+4NaC1
Tin(II) Pyrophosphate inhibit the formation of volatile sulphur compounds (VSC).
Diphosphoric acid, tin(2+) salt (1:2): ACTIVE
Cosmetics -> Antiplaque; Oral care; Soothing
Computed Properties
Molecular Weight:411.36
Hydrogen Bond Acceptor Count:7
Exact Mass:411.71574
Monoisotopic Mass:413.71633
Topological Polar Surface Area:136
Heavy Atom Count:11
Complexity:124
Covalently-Bonded Unit Count:3
Compound Is Canonicalized:Yes
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