An ionic compound made up of aluminium cation (Al3+), sodium cations (Na+), and phosphate anion (PO43-) in the ratio of 1:3:2, respectively. Other ratios are possible and some combinations also contain hydrogen and/or water molecules and/or HPO42- as well. It is used in baking as a leavening agent for making sponge cakes, crumpet.
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E541
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