A preservative authorised in the EU exclusively for fish roe — caviar and similar products. It prevents microbial spoilage and helps maintain texture in these high-value, perishable products. Borax is a boron compound found naturally in some environments but used here in synthetic form. Regulatory bodies including EFSA keep its permitted uses extremely limited due to concerns about boron accumulation in the body at higher intakes.
This additive is authorised to be used in the following 1 food category:
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