Calcium ferrocyanide explained

Calcium ferrocyanide is an inorganic compound with the formula Ca₂[Fe(CN)₆]. It is the Ca²⁺ salt of [Fe(CN)₆]^4-, ferrocyanide complex ion. A yellow solid, it is used as a precursor to the pigment Prussian blue.

Safety

It was listed in 2012 by the EU as a "Food Improvement Agent".

In the EU, ferrocyanides (E 535–538) were, as of 2018, solely authorised in two food categories as salt substitutes. Kidneys are the organ for ferrocyanide toxicity.^[1]

Notes and References

1. Peter Aggett, Fernando Aguilar, Riccardo Crebelli, Birgit Dusemund, Metka Filipič, Maria Jose Frutos, Pierre Galtier, David Gott, Ursula Gundert‐Remy, Gunter Georg Kuhnle, Claude Lambré, Jean‐Charles Leblanc, Inger Therese Lillegaard, Peter Moldeus, Alicja Mortensen, Agneta Oskarsson, Ivan Stankovic, Ine Waalkens‐Berendsen, Rudolf Antonius Woutersen, Matthew Wright and Maged Younes. . Re‐evaluation of sodium ferrocyanide (E 535), potassium ferrocyanide (E 536) and calcium ferrocyanide (E 538) as food additives . EFSA Journal . 2018 . 16 . 7 . 5374 . 10.2903/j.efsa.2018.5374 . 32626000 . 7009536 . free .