Sodium aluminosilicate

Sodium aluminosilicate
Names
IUPAC name
aluminum sodium dioxido(oxo)silane
Other names
Aluminosilicic acid, aluminum sodium silicate
Identifiers
1344-00-9
3D model (Jmol) Interactive image
ECHA InfoCard 100.014.259
PubChem 19758701
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

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.

Amorphous sodium aluminosilicate

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 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 and as food additive having E-number E-554 (anti-caking agents).

Sodium aluminosilicate may also be listed as:

Minerals sometimes called sodium aluminosilicate

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).

Synthetic zeolites sometimes called sodium aluminosilicate

Synthetic zeolites have complex structures and examples (with structural formulae) are:

References

  1. United Nations Environment Programme
  2. Solvay link no longer works
  3. "Sec. 182.2727 Sodium aluminosilicate.". U.S. Food and Drug Administration. 1 April 2012. Retrieved 10 December 2012.
  4. 1 2 Alan Dyer, (1994),Encyclopedia of Inorganic Chemistry, ed R. Bruce King, John Wiley & Sons, ISBN 0-471-93620-0
  5. "Formation and Properties of Losod, a New Sodium Zeolite", Werner Sieber, Walter M. Meie Helvetica Chimica Acta, Volume 57 Issue 6, pp. 1533–1549, 10.1002/hlca.19740570608
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