Potassium phosphates
The three potassium salts of (monomeric) phosphoric acid are collectively referred to as potassium phosphates ( potassium orthophosphate ) :
- Potassium dihydrogen phosphate (KH 2 PO 4 , "monopotassium phosphate")
- Dipotassium hydrogen phosphate (K 2 HPO 4 , "dipotassium phosphate")
- Potassium phosphate (K 3 PO 4 , "tripotassium phosphate")
They are approved as food additives in the European Union under the common number E 340 .
If they dissolve in water under physiological conditions, at pH 6–7, there is an equilibrium of hydrogen phosphate and dihydrogen phosphate anions.
Individual evidence
- ↑ Additives according to their E numbers. (PDF) Federal Ministry of Food and Agriculture, January 2015, accessed on June 20, 2019 .
- ^ Wiberg, Egon., Wiberg, Nils ,: Textbook of Inorganic Chemistry . 102nd, heavily reworked and verb. Ed. De Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 .