Sodium silicoaluminate

Sodium aluminosilicate

Names
IUPAC name aluminum sodium dioxido(oxo)silane
Other names Aluminosilicic acid, aluminum sodium silicate
Identifiers
CAS Number	1344-00-9
3D model (JSmol)	Interactive image
ECHA InfoCard	100.014.259
PubChem CID	19758701
InChI InChI=1S/Al.Na.2O3Si/c;;2*1-4(2)3/q+3;+1;2*-2 Y Key: URGAHOPLAPQHLN-UHFFFAOYSA-N Y
SMILES [O-][Si](=O)[O-].[O-][Si](=O)[O-].[Na+].[Al+3]
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.

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. One supplier quotes a typical analysis for one of their products as 14SiO₂·Al₂O₃·Na₂O·3H₂O,(Na₂Al₂Si₁₄O₃₂·3H₂O).

The FDA has as of April 1, 2012 approved sodium aluminosilicate (sodium silicoaluminate) for direct contact with consumable items under 21 CFR 182.2727. 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:

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