Chemical formula: K3Fe(CN)6
Synonyms: potassium ferricyanide, Prussian red, Red prussiate
Amount: 100 g
Appearance and odour: red crystals without appreciable odour
Grade: 99 %
Packaging: professional wide necked, white HDPE bottle with blue conical seal cap and tamper ring. Labelled. Bottle and cap are UN approved and reusable.
Description and uses: one of the most important ferric complexes. So strongly complexed is the central Fe3+ ion that solutions of this compound do not exhibit reactions typical of ferric ions.
With ferrous ions (Fe2+) Prussian Blue (idealised: Fe7(CN)18) is formed and potassium hexacyanoferrate can thus be used as a detector of ferrous compounds.
Due to near perfect complexation, potassium hexacyanoferrate is relatively non-toxic, despite the high cyanide content. In highly acidic conditions the highly toxic gas HCN (hydrogen cyanide) may be formed, so caution is needed there.
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