Calcium aluminosilicate

Calcium aluminosilicate is an aluminosilicate compound containing calcium cations, most commonly with the chemical formula CaAl₂Si₂O₈.<ref name=pc>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> In minerals, as a feldspar, it can be found as anorthite, an end-member of the plagioclase series.

Uses

As a food additive, it is sometimes designated E556. The FDA recognizes it as an anti-caking agent for table salt when used at levels below 2% by weight, and as an ingredient in vanilla powder.<ref name=pc/>