Calcium aluminosilicate

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Calcium aluminosilicate
ECHA InfoCard 100.048.597
EC Number
  • 253-476-9
E number E556 (acidity regulators, ...)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Calcium aluminosilicate, an aluminosilicate compound with calcium cations, most typically has formula CaAl2Si2O8.[1] In minerals, as a feldspar, it can be found as anorthite, an end-member of the plagioclase series.


As a food additive, it is sometimes designated E556. It is known to the FDA as, at under 2% by weight, an anti-caking agent for table salt, and as an ingredient in vanilla powder.[1]


  1. ^ a b "Compound Summary for CID 21881395 - Calcium Aluminosilicate". PubChem.