Sodium aluminium phosphate

Sodium aluminium phosphate (general) Other names E541 Identifiers CAS number [7785-88-8] EC number 232-090-4 Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Sodium aluminium phosphate (acidic, I) Other names E541(i) Properties Chemical formula NaAl3H14(PO4)8·4H2O Molar mass 949.88 g/mol Solubility in water insoluble Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Sodium aluminium phosphate (acidic, II) Other names E541(i) Properties Chemical formula Na3Al2H15(PO4)8 Molar mass 897.82 g/mol Solubility in water insoluble Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Sodium aluminium phosphate (basic) Other names E541(ii) Properties Chemical formula Na8Al2(OH)2(PO4)4 Molar mass 651.66 g/mol Solubility in water insoluble Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Sodium aluminium phosphate is a food additive (INS 541). It comes in two forms, acidic (INS 541(i)) and basic (INS 541(ii)). Both forms may be used as emulsifier and acidity regulators, while the acid form is also a raising agent.

Sodium aluminium phosphate is "generally recognized as safe" (GRAS) for use in table salt in the United States, and is also permitted for use in Canada. However, it is not permitted for use in Australia and New Zealand. In the European Union, only the acid form may be used, and then only as a raising agent in scones and sponges.