Disodium pyrophosphate

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Disodium pyrophosphate
Other names	Diphosphoric acid, disodium salt, Disodium dihydrogen pyrophosphate, Disodium diphosphate Sodium Acid Pyrophosphate
Identifiers
CAS number	[7758-16-9]
EINECS number	231-835-0
Properties
Molecular formula	Na2H2P2O7
Molar mass	221.94 g/mol
Appearance	white odorless powder
Density	1.1-1.3 g/mL (50 taps), solid
Melting point	Melts above 600 °C
Solubility in water	11.9 g / 100 g water (20 °C)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Disodium pyrophosphate or sodium acid pyrophosphate is a buffering and chelating agent used in canned seafood, as a scald agent in poultry and pork, as a sequesterant in potato products, and is used to aid leavening in baked goods.

[edit] Other uses

In leather treatment it can be used to remove iron stains on hides during processing. It can stabilize hydrogen peroxide solutions against oxidation. It can be used for cleaning with sulfamic acid in some dairy applications. In petroleum production, it can be used as a dispersant in oil well drilling muds. Disodium pyrophosphate is also found in hash browns (frozen) to keep the color of the potatoes from fading.

[edit] References

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