Sodium ferrocyanide

Sodium ferrocyanide^[1]
Names
	IUPAC name Tetrasodium [hexacyanoferrate(II)]
	Other names Yellow prussiate of soda (YPS); Tetrasodium hexacyanoferrate; Gelbnatron; Ferrocyannatrium; sodium hexacyanoferrate(II); Yellow blood salt[citation needed];
Identifiers
CAS Number	13601-19-9 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.033.696
EC Number	237-081-9;
E number	E535 (acidity regulators, ...)
PubChem CID	26129;
UNII	5HT6X21AID ;
CompTox Dashboard (EPA)	DTXSID3051337 ;
	InChI InChI=1S/6CN.Fe.4Na/c61-2;;;;;/q6-1;+2;4*+1;
	SMILES [Na+].[Na+].N#C[Fe-4](C#N)(C#N)(C#N)(C#N)C#N.[Na+].[Na+];
Properties
Chemical formula	Na4[Fe(CN)6]
Molar mass	303.91 g/mol
Appearance	pale yellow crystals
Odor	odorless
Density	1.458 g/cm3
Melting point	435 °C (815 °F; 708 K) (anhydrous) ; 81.5 °C (178.7 °F; 354.6 K) (decahydrate) (decomposes)
Solubility in water	10.2 g/100 mL (10 °C) ; 17.6 g/100 mL (20 °C) ; 39.7 g/100 mL (96.6 °C)
Refractive index (nD)	1.530
Structure
Crystal structure	monoclinic
Related compounds
Other anions	Sodium ferricyanide (Red prussiate of soda)
Other cations	Potassium ferrocyanide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Sodium ferrocyanide is the sodium salt of the coordination compound of formula [Fe(CN)₆]⁴⁻. In its hydrous form, Na₄Fe(CN)₆ · 10 H₂O (sodium ferrocyanide decahydrate), it is sometimes known as yellow prussiate of soda. It is a yellow crystalline solid that is soluble in water and insoluble in alcohol. The yellow color is the color of ferrocyanide anion. Despite the presence of the cyanide ligands, sodium ferrocyanide has low toxicity (acceptable daily intake 0–0.025 mg/kg body weight^[2]). The ferrocyanides are less toxic than many salts of cyanide, because they tend not to release free cyanide.^[3] However, like all ferrocyanide salt solutions, addition of an acid or exposure to UV light can result in the production of hydrogen cyanide gas, which is extremely toxic. ^[4]^[5]

^ Sodium ferrocyanide MSDS Archived 2010-05-17 at the Wayback Machine
^ "Toxicological evaluation of some food additives including anticaking agents, antimicrobials, antioxidants, emulsifiers and thickening agents". inchem.org. World Health Organization. 1974. Archived from the original on 1 December 2010. Retrieved 18 May 2009.
^ Holleman, A. F.; Wiberg, E. (2001). Inorganic Chemistry. San Diego: Academic Press. ISBN 0-12-352651-5.
^ "PubChem Compound Summary for CID 26129, Sodium ferrocyanide". National Center for Biotechnology Information. PubChem. Archived from the original on 2023-02-13. Retrieved 2023-01-17.
^ "PubChem Compound Summary for CID 768, Hydrogen Cyanide". National Center for Biotechnology Information. PubChem. Archived from the original on 2023-03-03. Retrieved 2023-01-17.

[1] Sodium ferrocyanide MSDS Archived 2010-05-17 at the Wayback Machine

[toxic-2] "Toxicological evaluation of some food additives including anticaking agents, antimicrobials, antioxidants, emulsifiers and thickening agents". inchem.org. World Health Organization. 1974. Archived from the original on 1 December 2010. Retrieved 18 May 2009.

[Holl-3] Holleman, A. F.; Wiberg, E. (2001). Inorganic Chemistry. San Diego: Academic Press. ISBN 0-12-352651-5.

[4] "PubChem Compound Summary for CID 26129, Sodium ferrocyanide". National Center for Biotechnology Information. PubChem. Archived from the original on 2023-02-13. Retrieved 2023-01-17.

[5] "PubChem Compound Summary for CID 768, Hydrogen Cyanide". National Center for Biotechnology Information. PubChem. Archived from the original on 2023-03-03. Retrieved 2023-01-17.

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