Calcium ferrocyanide
Names
Other names
Dicalcium hexakis(cyano-κC)ferrate(4-)
Identifiers
3D model (JSmol)
ECHA InfoCard 100.034.085 Edit this at Wikidata
EC Number
  • 237-508-9
E number E538 (acidity regulators, ...)
UNII
  • InChI=1S/6CN.2Ca.Fe/c6*1-2;;;/q6*-1;3*+2
    Key: BAZQCHGUTMBXBU-UHFFFAOYSA-N
  • [C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[Ca+2].[Ca+2].[Fe+2]
Properties
C6Ca2FeN6
Molar mass 292.109 g·mol−1
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H312, H315, H319, H332, H335
P261, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P332+P313
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth (blue): no hazard codeFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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.[1]

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.[2]

References

  1. ^ Gail, E.; Gos, S.; Kulzer, R.; Lorösch, J.; Rubo, A.; Sauer, M.; Kellens, R.; Reddy, J.; Steier, N. (2011). "Cyano Compounds, Inorganic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a08_159.pub3.
  2. ^ 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. (2018). "Re‐evaluation of sodium ferrocyanide (E 535), potassium ferrocyanide (E 536) and calcium ferrocyanide (E 538) as food additives". EFSA Journal. 16 (7): 5374. doi:10.2903/j.efsa.2018.5374. PMC 7009536. PMID 32626000.((cite journal)): CS1 maint: multiple names: authors list (link)
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