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E 284Preservatives

Boric acid

Characteristics

Additive NameBoric acid
E No.E 284
TypeIndividual Substance
In plain language

A preservative authorised in the EU exclusively for one product: traditional sturgeon caviar. It prevents bacterial growth and maintains the texture and appearance of the roe during storage. Boric acid is a naturally occurring mineral compound, but it is toxic in larger doses and accumulates in the body over time. Its use is tightly restricted precisely because of these concerns — healthy adults consuming caviar occasionally are exposed to very small amounts.

Conditions of Use

This additive is authorised to be used in the following 1 food category:

9.3fish roe
Maximum Level = 4000 mg/kg
only Sturgeons' eggs (Caviar)
Footnote 54: Expressed as boric acid

Source

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E 284 - Boric acid | E-Number Information