Calcium Silicate (E552) – Food Additive Explained
Calcium Silicate (E552) is an approved food additive used as an anticaking agent and release agent. It prevents powders from clumping together and is considered safe for consumption.
Things worth knowing about "Calcium Silicate"
Calcium Silicate (E552) is an approved food additive used as an anticaking agent and release agent. It prevents powders from clumping together and is considered safe for consumption.
What is Calcium Silicate?
Calcium Silicate (chemical formula: CaSiO3) is an inorganic compound composed of calcium and silicon. In the food industry, it is used under the EU food additive number E552 as an anticaking agent and release agent. It occurs naturally in various minerals and can also be synthetically produced.
Use in Food Products
Calcium Silicate is primarily used to prevent caking and clumping in powdered or granulated food products. Typical applications include:
- Table salt and sea salt
- Baking powder and baking mixes
- Spice powders and seasoning blends
- Icing sugar and powdered milk
- Dietary supplements in tablet form (as a binder and filler)
Mechanism of Action
Calcium Silicate works due to its porous, highly absorbent structure. It absorbs moisture, thereby preventing powder particles from sticking together. This maintains the free-flowing properties of food ingredients even under conditions of elevated humidity. In the pharmaceutical industry, it also serves as a carrier substance for active ingredients and as a tablet disintegrant.
Approval and Safety
Calcium Silicate is approved in the European Union under Regulation (EC) No. 1333/2008 on food additives as E552. The European Food Safety Authority (EFSA) has evaluated the substance and classified it as safe when used in the prescribed quantities. An acceptable daily intake (ADI) was defined as not specified, meaning the amounts typically consumed through food are considered non-problematic.
Industrial and Technical Applications
Beyond the food industry, Calcium Silicate has wide applications in other sectors:
- Construction industry: As a thermal insulation material and fireproof substance in walls and ceilings.
- Pharmaceutical industry: As a carrier substance, filler, and tablet additive.
- Cosmetics industry: As a mattifying agent and carrier for fragrances.
Health Assessment
When ingested through food, Calcium Silicate is considered physiologically inert, meaning it is not significantly absorbed or metabolized by the body and is largely excreted unchanged. Allergic reactions or toxic effects are not known when the substance is used as intended in food. However, individuals at risk for silicosis should avoid contact with fine Calcium Silicate dusts in industrial settings.
References
- European Food Safety Authority (EFSA): Re-evaluation of calcium silicate (E 552), magnesium silicate (E 553a) and talc (E 553b) as food additives. EFSA Journal, 2018.
- Regulation (EC) No. 1333/2008 of the European Parliament and of the Council on food additives.
- WHO Food Additives Series: Safety evaluation of certain food additives. World Health Organization, Geneva.
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