Sodium aluminium phosphate

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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).[1] It comes in two forms, acidic (INS 541(i))[2] and basic (INS 541(ii)).[3] Both forms may be used as emulsifier and acidity regulators,[1] while the acid form is also a raising agent.[2]

Sodium aluminium phosphate is "generally recognized as safe" (GRAS) for use in table salt in the United States,[4] and is also permitted for use in Canada.[5] However, it is not permitted for use in Australia and New Zealand.[6] In the European Union, only the acid form may be used, and then only as a raising agent in scones and sponges.[7][8]

See also

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