Dipotassium inosinate

Dipotassium inosinate is the potassium salt of inosinic acid, used as an umami flavour enhancer in processed foods, seasonings, and instant soups. Its function mirrors that of disodium inosinate (E631) — both provide the same nucleotide-based umami enhancement — but dipotassium inosinate substitutes potassium for sodium, making it useful in low-sodium product formulations. In combination with glutamate-class enhancers, it participates in the glutamate-nucleotide synergy that is the basis of most commercially used savoury flavour systems.

JECFA assessed dipotassium inosinate as part of its 1987 review of the inosinate family and classified the ADI as "not specified." Inosine monophosphate is a natural nucleotide metabolite, and potassium is an essential mineral; neither component raises concerns at food additive concentrations.

Dipotassium inosinate is approved in the EU and in other markets as E632 for use as a flavour enhancer. Like all inosinate and guanylate additives, it contains purines that are metabolised to uric acid in the body. This makes E632 relevant for consumers managing gout or hyperuricaemia, who should monitor their intake of nucleotide-based flavour enhancers. Dipotassium inosinate is encountered less frequently on food labels than the disodium form, but carries identical dietary significance. Consumers tracking sodium intake may find it in reformulated low-sodium savoury snacks and seasoning blends as a direct replacement for disodium inosinate.