Sodium ethyl para-hydroxybenzoate

Sodium ethyl para-hydroxybenzoate is the sodium salt of ethylparaben, a member of the para-hydroxybenzoate (paraben) ester family used as a preservative against moulds, yeasts, and bacteria. As a sodium salt it offers better water solubility than the free ester form (E214, ethylparaben), allowing easier incorporation into aqueous formulations. Parabens are effective across a broad pH range — unlike benzoic acid and sorbic acid — which makes them applicable in products with higher pH values where these other preservatives are ineffective.

JECFA evaluated the paraben family in 1996 and established a group ADI of 10 mg/kg body weight per day for all hydroxybenzoate esters and their salts combined. Parabens are metabolised by esterases in the gut to para-hydroxybenzoic acid, a substance that occurs naturally in plants and human metabolic pathways. However, concern has been raised about the weak oestrogenic activity observed for some parabens in in vitro studies and animal models, particularly for the longer-chain propyl and butyl parabens, though short-chain parabens like ethyl and methyl forms show considerably lower activity.

Sodium ethyl para-hydroxybenzoate is approved in the EU as E215 for use in specific food categories. The EU has placed restrictions on the use of several paraben additives in foods intended for infants and young children, reflecting a precautionary approach to potential endocrine-related effects in sensitive developmental stages. For adults consuming foods with approved paraben levels, the group ADI provides an adequate safety margin. Consumers who prefer to minimise paraben exposure can check ingredient labels for E214–E219 and E215 specifically.