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IUPAC name
aluminum sodium dioxido(oxo)silane
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Other names
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3D model (
JSmol)
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ECHA InfoCard | 100.014.259 |
E number | E554 (acidity regulators, ...) |
PubChem
CID
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UNII | |
CompTox Dashboard (
EPA)
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Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Sodium aluminosilicate refers to compounds which contain sodium, aluminium, silicon and oxygen, and which may also contain water. These include synthetic amorphous sodium aluminosilicate, a few naturally occurring minerals and synthetic zeolites. Synthetic amorphous sodium aluminosilicate is widely used as a food additive, E 554.
This substance is produced with a wide range of compositions and has many different applications. It is encountered as an additive E 554 in food where it acts as an anticaking (free flow) agent. As it is manufactured with a range of compositions it is not strictly a chemical compound with a fixed stoichiometry. [1] One supplier quotes a typical analysis for one of their products as 14SiO2·Al2O3·Na2O·3H2O,(Na2Al2Si14O32·3H2O). [2]
The US FDA has as of April 1, 2012 approved sodium aluminosilicate (sodium silicoaluminate) for direct contact with consumable items under 21 CFR 182.2727. [3] Sodium aluminosilicate is used as molecular sieve in medicinal containers to keep contents dry.
Sodium aluminosilicate may also be listed as:
The formation of sodium aluminosilicate makes the Bayer process uneconomical for bauxites high in silica.[ citation needed]
Naturally occurring minerals that are sometimes given the chemical name, sodium aluminosilicate include albite (NaAlSi3O8, an end-member of the plagioclase series) and jadeite (NaAlSi2O6).[ citation needed]
Synthetic zeolites have complex structures and examples (with structural formulae) are: