| 词条 | Sodium ferrocyanide |
| 释义 |
| Watchedfields = changed | verifiedrevid = 440300753 | Reference = [1] | Name = Sodium ferrocyanide | ImageFile = sodium ferrocyanide.png | ImageSize = 200px | IUPACName = Tetrasodium [hexacyanoferrate(II)] | OtherNames = Yellow prussiate of soda (YPS), Tetrasodium hexacyanoferrate, Gelbnatron, Ferrocyannatrium, sodium hexacyanoferrate(II), Yellow blood salt{{citation needed|date=December 2015}} |Section1={{Chembox Identifiers | CASNo_Ref = {{cascite|correct|??}} | CASNo = 13601-19-9 | EINECS = 237-081-9 | PubChem = 26129 | RTECS = | InChI = 1S/6CN.Fe.4Na/c6*1-2;;;;;/q6*-1;+2;4*+1 | SMILES = [Na+].[Na+].N#C[Fe-4](C#N)(C#N)(C#N)(C#N)C#N.[Na+].[Na+] |Section2={{Chembox Properties | Formula = Na4[Fe(CN)6] | MolarMass = 303.91 g/mol | Appearance = pale yellow crystals | Odor = odorless | Density = 1.458 g/cm3 | Solubility = 10.2 g/100 mL (10 °C) 17.6 g/100 mL (20 °C) 39.7 g/100 mL (96.6 °C) | MeltingPt = {{convert|435|C|F K}} (anhydrous) {{convert|81.5|C|F K}} (decahydrate) | MeltingPt_notes = (decomposes) | BoilingPt = | RefractIndex = 1.530 |Section3={{Chembox Structure | Coordination = | CrystalStruct = monoclinic |Section7={{Chembox Hazards | MainHazards = | RPhrases = | SPhrases = {{S22}} {{S24}} {{S25}} |Section8={{Chembox Related | OtherAnions = Sodium ferricyanide (Red prussiate of soda) | OtherCations = Potassium ferrocyanide }} Sodium ferrocyanide is the sodium salt of the coordination compound of formula [Fe(CN)6]4−. In its hydrous form, Na4Fe(CN)6{{hydrate|10}} (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.[2] However, like all ferrocyanide salt solutions, addition of an acid can result in the production of hydrogen cyanide gas, which is toxic. UsesSodium ferrocyanide is a chemical additive known as E number E535 in the EU. It is added to road and food grade salt as an anticaking agent.[3] When combined with iron, it converts to a deep blue pigment called Prussian blue.[4] It is used as a stabilizer for the coating on welding rods. In the petroleum industry, it is used for removal of mercaptans. 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.[5] ProductionSodium ferrocyanide is produced industrially from hydrogen cyanide, ferrous chloride, and calcium hydroxide, the combination of which affords Ca2[Fe(CN)6]{{hydrate|11}}. A solution of this salt is then treated with sodium salts to precipitate the mixed calcium-sodium salt CaNa2[Fe(CN)6], which in turn is treated with sodium carbonate to give the tetrasodium salt.[6] References1. ^Sodium ferrocyanide MSDS {{webarchive|url=https://web.archive.org/web/20100517032546/http://siri.org/msds/f2/bdn/bdnqc.html |date=2010-05-17 }} {{Sodium compounds}}2. ^{{ cite book |author1=Holleman, A. F. |author2=Wiberg, E. | title = Inorganic Chemistry | publisher = Academic Press | location = San Diego | year = 2001 | isbn = 0-12-352651-5 }} 3. ^1 {{cite web| url =http://www.inchem.org/documents/jecfa/jecmono/v05je02.htm|title = Toxicological evaluation of some food additives including anticaking agents, antimicrobials, antioxidants, emulsifiers and thickening agents| publisher = World Health Organization, Geneva| year = 1974|accessdate = 18 May 2009}} 4. ^{{cite web| title = Prussian blue |publisher = Encyclopædia Britannica|accessdate =18 May 2009 |url =http://www.britannica.com/EBchecked/topic/480982/Prussian-blue}} 5. ^{{cite journal |last1=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. |title=Re‐evaluation of sodium ferrocyanide (E 535), potassium ferrocyanide (E 536) and calcium ferrocyanide (E 538) as food additives |journal=EFSA Journal |date=2018 |volume=16 |issue=7 |page=5374 |doi=10.2903/j.efsa.2018.5374 |url=https://www.efsa.europa.eu/en/efsajournal/pub/5374}} 6. ^{{ cite encyclopedia |author1=Gail, E. |author2=Gos, S. |author3=Kulzer, R. |author4=Lorösch, J. |author5=Rubo, A. |author6=Sauer, M. |author7=Kellens, R. |author8=Reddy, J. |author9=Steier, N. |author10=Hasenpusch, W. | title = Cyano Compounds, Inorganic | encyclopedia = Ullmann's Encyclopedia in Industrial Chemistry | year = 2011 | publisher = Wiley-VCH | location = Weinheim | doi = 10.1002/14356007.a08_159.pub3 }} 4 : Sodium compounds|Cyano complexes|E-number additives|Nephrotoxins |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。