Prussian Blue used in many
industry applications

Prussian Blue is a dark blue pigment with the chemical formula Fe₇(CN)₁₈. It finds various industrial applications due to its unique properties. Here are some of its industrial uses:

1. Pigment: Prussian Blue is primarily used as a pigment in paints, coatings, and printing inks due to its intense blue color, stability, and lightfastness.
2. Medical Applications: It is used in medicine as an antidote for certain types of heavy metal poisoning, such as thallium and cesium poisoning, by facilitating their elimination from the body.
3. Photography: Prussian Blue has historical use in photography as a component of cyanotype and blueprint processes.
4. Analytical Chemistry: It is used in analytical chemistry as a reagent for detecting and quantifying certain ions, particularly iron and copper ions.
5. Water Treatment: Prussian Blue is used in water treatment processes for removing radioactive cesium and certain heavy metal ions from contaminated water.
6. Art Conservation: It is used in art conservation to stabilize and restore historical artworks, particularly those affected by degradation due to metal ion contamination.
7. Electrochemical Applications: Prussian Blue and its derivatives are used in electrochemical sensors and electrodes for their electrocatalytic properties and ability to store and release ions.
8. Electronics: It is used in electronics for its magnetic properties and in the production of magnetic recording media.
9. Industrial Catalysts: Prussian Blue-based materials are explored as catalysts for various chemical reactions, including oxidation and hydrogenation reactions.
10. Food Additives: In some countries, Prussian Blue is approved as a food additive (E number E 535) and used as an antidote in certain cases of food poisoning.