Calcium ferrocyanide

Calcium ferrocyanide
Names
	Other names Dicalcium hexakis(cyano-κC)ferrate(4-);
Identifiers
CAS Number	13821-08-4;
3D model (JSmol)	Interactive image;
ChemSpider	146050;
ECHA InfoCard	100.034.085
EC Number	237-508-9;
E number	E538 (acidity regulators, ...)
PubChem CID	166920;
UNII	906D36VLZG;
CompTox Dashboard (EPA)	DTXSID80930018 ;
	InChI InChI=1S/6CN.2Ca.Fe/c61-2;;;/q6-1;3* 2 Key: BAZQCHGUTMBXBU-UHFFFAOYSA-N;
	SMILES [C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[Ca 2].[Ca 2].[Fe 2];
Properties
Chemical formula	C6Ca2FeN6
Molar mass	292.109 g·mol−1
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H312, H315, H319, H332, H335
Precautionary statements	P261, P280, P301 P312, P302 P352, P304 P340, P305 P351 P338, P332 P313
NFPA 704 (fire diamond)	0 0
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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

^ Gail, E.; Gos, S.; Kulzer, R.; Lorösch, J.; Rubo, A.; Sauer, M.; Kellens, R.; Reddy, J.; Steier, N.; Hasenpusch, W. (2011). "Cyano Compounds, Inorganic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a08_159.pub3. ISBN 978-3527306732.
^ 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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[Ullmann-1] Gail, E.; Gos, S.; Kulzer, R.; Lorösch, J.; Rubo, A.; Sauer, M.; Kellens, R.; Reddy, J.; Steier, N.; Hasenpusch, W. (2011). "Cyano Compounds, Inorganic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a08_159.pub3. ISBN 978-3527306732.

[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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