Potassium Hexacyanoferrate(II) Trihydrate


K4Fe(CN)6 • 3H2O

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Product Code Available Product Forms Request A Quote
K-CYFE6-02-C.3HYD (2N) 99% Potassium Hexacyanoferrate(II) Trihydrate Request
K-CYFE6-03-C.3HYD (3N) 99.9% Potassium Hexacyanoferrate(II) Trihydrate Request
K-CYFE6-04-C.3HYD (4N) 99.99% Potassium Hexacyanoferrate(II) Trihydrate Request
K-CYFE6-05-C.3HYD (5N) 99.999% Potassium Hexacyanoferrate(II) Trihydrate Request


Compound Formula C6H6FeK4N6O3
Molecular Weight 422.39
Appearance Yellow crystals
Melting Point 70 °C
Boiling Point N/A
Density 1.85 g/cm3
Exact Mass 421.839902
Monoisotopic Mass 421.839902

Health & Safety Info  |  MSDS / SDS

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Risk Codes N/A
Safety Statements N/A
Transport Information N/A
Globally Harmonized System of Classification and Labelling (GHS) N/A


Potassium Hexacyanoferrate(II) Trihydrate is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.


Potassium ferricyanide trihydrate; Potassium Ferrocyanide Trihydrate; Yellow prussiate; Iron(2+) potassium cyanide hydrate (1:4:6:3); tetrapotassium iron(2+) hexacyanide trihydrate; Ferrate(4-), hexakis(cyano-C)-, tetrapotassium, trihydrate, (OC-6-11)-

Chemical Identifiers

Formula K4Fe(CN)6 • 3H2O
CAS 14459-95-1
Pubchem CID 161067 16211991
MDL MFCD00167023
EC No. 237-722-2
IUPAC Name tetrapotassium; iron(2+); hexacyanide; trihydrate
SMILES [Fe+2].[K+].[K+].[K+].[K+].[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.O.O.O
InchI Identifier InChI=1S/6CN.Fe.4K.3H2O/c6*1-2;;;;;;;;/h;;;;;;;;;;;3*1H2/q6*-1;+2;4*+1;;;

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Material Safety Data Sheet (MSDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes.

Related Products & Element Information

See more Iron products. Iron (atomic symbol: Fe, atomic number: 26) is a Block D, Group 8, Period 4 element with an atomic weight of 55.845. The number of electrons in each of Iron's shells is 2, 8, 14, 2 and its electron configuration is [Ar] 3d6 4s2. Iron Bohr ModelThe iron atom has a radius of 126 pm and a Van der Waals radius of 194 pm. Iron was discovered by humans before 5000 BC. In its elemental form, iron has a lustrous grayish metallic appearance. Iron is the fourth most common element in the Earth's crust and the most common element by mass forming the earth as a whole. Iron is rarely found as a free element, since it tends to oxidize easily; it is usually found in minerals such as magnetite, hematite, goethite, limonite, or siderite.Elemental Iron Though pure iron is typically soft, the addition of carbon creates the alloy known as steel, which is significantly stronger. For more information on iron, including properties, safety data, research, and American Elements' catalog of iron products, visit the Iron element page. .

Elemental PotassiumSee more Potassium products. Potassium (atomic symbol: K, atomic number: 19) is a Block S, Group 1, Period 4 element with an atomic weight of 39.0983. The number of electrons in each of Potassium's shells is [2, 8, 8, 1] and its electron configuration is [Ar] 4s1. The potassium atom has a radius of 227.2 pm and a Van der Waals radius of 275 pm. Potassium was discovered and first isolated by Sir Humphrey Davy in 1807. Potassium is the seventh most abundant element on earth. It is one of the most reactive and electropositive of all metals and rapidly oxidizes. Potassium Bohr ModelAs with other alkali metals, potassium decomposes in water with the evolution of hydrogen because of its reacts violently with water, it only occurs in nature in ionic salts. In its elemental form, potassium has a silvery gray metallic appearance, but its compounds (such as potassium hydroxide) are more frequently used in industrial and chemical applications. The origin of the element's name comes from the English word 'potash,' meaning pot ashes, and the Arabic word qali, which means alkali. The symbol K originates from the Latin word kalium.