Ammonium acetate

Ammonium acetate is the ammonium salt of acetic acid, combining two compounds that are normal products of food fermentation and protein metabolism. In food it functions as an acidity regulator, adjusting and stabilising pH in baked goods, condiments, and savoury products. It contributes a mild vinegary note at higher concentrations. Unlike sodium acetate, it adds no sodium to the formulation, which is relevant in low-sodium product development. The ammonium ion is a normal metabolic product of amino acid catabolism.

JECFA evaluated ammonium acetate in 1965 and classified the ADI as "not specified," reflecting the absence of toxicological concern at levels consistent with food use. Acetic acid is a normal component of human metabolism — the two-carbon acetyl unit is a fundamental intermediate in energy production — and ammonium is continuously produced and excreted in healthy individuals through the urea cycle. Both components are therefore handled efficiently by normal physiological processes without accumulation.

Ammonium acetate is approved in the EU and in most food regulatory frameworks for use as an acidity regulator. Its primary food application is as a leavening and acidity modifier in Scandinavian baked goods, where it contributes to the distinctive flavour of traditional ammonia-leavened biscuits such as hjortebakkelse (Scandinavian Christmas cookies). The ammonium released during baking provides leavening and imparts a characteristic slightly savoury background flavour to these products. For consumers, ammonium acetate is a safe and well-evaluated additive. Those who closely monitor sodium intake may find it a useful alternative to sodium acetate in relevant formulations.