Calcium Silicate

Anti-caking AgentsCAS: 1344-95-2

This is what the ingredient is.

Calcium silicate is an inorganic compound used as an anticaking agent and carrier for flavors and colors.

Here is why it shows up on the label.

Prevents caking in salt, baking powder, and seasonings. Used as a carrier for flavors and as an antacid.

Here is what food agencies say.

The FDA lists it as Generally Recognized as Safe. with limits (2-5% depending on application). European food agencies allow it (E552). It is permitted in many countries worldwide.

Here is what research has found.

an FAO/WHO expert committee confirms safety. Poorly absorbed from gut. Long history of use in food industry.

Here are a few things worth knowing.

Generally safe at food-use levels. Industrial exposure to silicate dust is an occupational concern.

Sources

  • FDA CFR 21
  • EFSA Panel on Food Additives
  • JECFA

How to read this page

We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.

v1.0Updated 9/12/2026