Prussian blue used industries : pharmaceutical industries dye chemical industries ink industries annually 12,000 tonnes is required only for ink industry uses of Prussian blue: the Prussian blue is widely used in oil,water color and dyeing industries it is used for production of black and bluish inks Prussian blue ability to absorb the monovalent metallic cations ,which type of cation is toxic to our body. it is used for chelating agents for certain toxic heavy metals like thallium or radioactive caesiuim it is used for finds the iron sample in the bio specimens. synthesis of Prussian blue : chemicals required : distilled water ferric chloride(FeCl3)-4 grams potassium ferrocyanide-1.5 grams filter paper -1 100ml measuring jar safety note