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E 551Acidity Regulators & Anti-caking Agents

Silicon dioxide

Characteristics

Additive NameSilicon dioxide
E No.E 551
TypeIndividual Substance
In plain language

An anti-caking agent — it stops powdered and granulated foods from clumping together. Found in powdered spices, salt, grated cheese, and some supplements. It is synthetic but chemically identical to the mineral found in sand and quartz. Generally considered safe by EFSA and FDA at normal food use levels. The body does not absorb it — it passes through without interacting. Nano-sized particles have raised some scientific discussion, but current evidence does not indicate a health concern at permitted doses.

Conditions of Use

This additive is authorised to be used in the following 3 food categories:

5.3chewing gum
Quantum satis (no max)
surface treatment only
13.1.3Processed cereal-based foods and baby foods as defined by Regulation (EU) No 609/2013
Maximum Level = 2000 mg/kg
only dry cereals
13.1foods for infants and young children
= 10.000 mg/kg
in nutrient preparations

Source

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E 551 - Silicon dioxide | E-Number Information