Potassium ferricyanide

Potassium ferricyanide (CAS 13746-66-2) is an inorganic iron-cyanide salt commercially known as red prussiate or potassium ferricyanate, with the shorthand formula K3[Fe(CN)6]. It carries no assigned E-code and is classified under HS code 28372000.

In water treatment, it oxidises dissolved iron and manganese ions, precipitating them for filtration removal. In textile and leather processing, it acts as a controlled oxidising agent during dyeing and finishing operations. Its antimicrobial activity stems from its capacity to disrupt cellular redox balance in target organisms.

Potassium ferricyanide is sourced as fine orange-to-red crystals in technical and reagent grades, compliant with REACH registration requirements applicable in the EU. Suppliers typically offer packaging in 25 kg bags or fibre drums. Buyers should confirm grade specification against intended application, as purity thresholds vary between industrial and laboratory-grade material.