7663. Potassium Pyrophosphate

Nomenclature

CAS number: 7320-34-5
Diphosphoric acid tetrapotassium salt.
K4O7P2; mol wt 330.34.
K 47.34%, O 33.90%, P 18.75%.
K4P2O7.

Description and references

Manuf: Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York, 4th ed., 1975) pp 684-687.

Derivative

Trihydrate.

Properties

Colorless, deliquesc granules or cryst mass; freely sol in water; insol in alcohol. The aq soln is alkaline.

Use

In detergents and surfactants; in water treatment; in drilling muds as a clay thinner.