Potassium Ferrate(VI) 95%, Pure

What is Potassium Ferrate(VI)?

Potassium ferrate(VI) is a purple gray to violet chemical compound that is stable in its pure form.

The ferrate(VI) ion (FeVIO42-) contains an iron atom tetrahedrally surrounded by four oxygen atoms. It is a charge transfer complex, which explains the intense coloration.

In this compound, iron is in the highest oxidation state. Potassium ferrate is therefore a strong oxidizing agent, stronger than potassium permanganate.

Potassium ferrate crystallizes in an orthorhombic crystal structure with the space group Pnam (space group no. 62, position 6). The lattice constants are a=769 pm, b=1033 pm and c=586 pm. The structure is isomorphic to that of potassium sulfate and potassium chromate. The connection is only durable when it is dry. Highly diluted solutions are stable for some time, while concentrated solutions decompose quickly, so this substance should be stored dry.

What is Potassium Ferrate(VI) used for?

Because the by-products of the redox reactions are rusty iron oxides, K2FeO4 is described as a "green oxidant". It has been used in wastewater treatment as an oxidizing agent for organic contaminants. Conveniently, the resulting reaction product is iron(III) oxyhydroxide, an excellent flocculant. In organic synthesis, K2FeO4 oxidizes primary alcohols. In contrast, related oxidants such as chromate are considered hazardous to the environment

K2FeO4 has also attracted attention as a potential cathode material in a 'super iron battery'.

Stabilized forms of potassium ferrate have been proposed for removal of transuranic species, both dissolved and suspended, from aqueous solutions. Tonnage amounts were proposed to help rectify the consequences of the Chernobyl disaster in Belarus. This new technique has been successfully applied for the removal of a wide range of heavy metals.

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Technical data

Potassium Ferrate(VI)
Empirical formula KFeO4
Molar mass (M) 198.0392 g/mol
Density (D) 2.829 g/cm³
Melting point (mp) <198 °C (dec.)
WGK 1
CAS No. 13718-66-6

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Hazard statement(s)
H272 May intensify fire; oxidizer.

Precautionary statement(s)
P220 Keep/Store away from clothing/ combustible materials.