Zinc pyrophosphate (Zn2P2O7) is an ionic inorganic chemical compound composed of Zn2+ cations and pyrophosphate anions.

[2] It can also be obtained from the reaction between sodium carbonate, zinc oxide, and ammonium dihydrogen phosphate.

[3] It is also produced when a strongly acidic solution of zinc sulfate is heated with sodium pyrophosphate.

[4] Another method is precipitating zinc as a phosphate, then heating over 1123 K.[citation needed] Zinc pyrophosphate is a white crystalline solid that is insoluble in water.

[5] On heating in water, it decomposes to form Zn3(PO4)2 and ZnHPO4.