Ethyl maltol

Ethyl maltol is a synthetic flavour modifier structurally similar to maltol but with an ethyl group in place of the methyl substituent. This structural change makes ethyl maltol approximately four to six times more potent than maltol (E636) at enhancing sweet and fruity flavour notes. It is used in very small quantities — typically at parts-per-million levels — in confectionery, beverages, ice cream, baked goods, and processed fruit products to intensify sweetness and round out flavour character.

JECFA established an ADI of 2 mg/kg body weight per day for ethyl maltol in 1969, a value higher than maltol's not because of lower concern but because the compound requires a higher reference dose to account for its greater potency at lower concentrations. Typical dietary exposure from permitted food uses remains well within the ADI. Ethyl maltol is not a naturally occurring food constituent; it is produced synthetically, though analogues exist in some natural aromatic compounds.

Ethyl maltol is approved throughout the EU and in most global food markets as a flavour enhancer and modifier. It is particularly prevalent in confectionery formulations, fruit-flavoured beverages, and sweet bakery products where it can help reduce the sugar content needed to achieve a target sweetness profile. Manufacturers value it for its ability to enhance perceived sweetness without adding calories or altering the product's texture, making it a useful tool in sugar-reduction reformulation. On ingredient labels it appears as ethyl maltol or E637. No significant consumer health concerns have been identified at typical food use levels.