Calcium ferrocyanide

Chemical compound From Wikipedia, the free encyclopedia

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]

Quick facts Names, Identifiers ...
Calcium ferrocyanide
Names
Other names
  • Dicalcium hexakis(cyano-κC)ferrate(4-)
Identifiers
3D model (JSmol)
ChemSpider
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).
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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

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