Various diphosphates are used as emulsifiers, stabilisers, acidity regulators, raising agents, sequestrants, and water retention agents in food processing. They are classified in the E number scheme under E450:
*E450(a): disodium dihydrogen diphosphate; trisodium diphosphate; tetrasodium diphosphate (TSPP); tetrapotassium diphosphate
*E450(b): pentasodium and pentapotassium triphosphate
*E450(c): sodium and potassium polyphosphates
In particular, various formulations of diphosphates are used to stabilize whipped cream.