Calcium ferrocyanide

Last updated
Calcium ferrocyanide
Calcium ferrocyanide.svg
Names
Other names
  • Dicalcium hexakis(cyano-κC)ferrate(4-)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.085 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 237-508-9
E number E538 (acidity regulators, ...)
PubChem CID
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:
GHS-pictogram-exclam.svg
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.svgHealth (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. It is insoluble in water, acids, and organic solvents. [1] A yellow solid, it is used as a precursor to the pigment Prussian blue. [2]

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. [3]

References

  1. ↑ CRC Handbook of Chemistry and Physics (PDF). p. 757.
  2. ↑ 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   978-3-527-30673-2.
  3. ↑ 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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