1. Excess ammonium ferric citrate and potassium ferricyanide are then washed away. 2. In most amateur darkrooms, a popular bleach is potassium ferricyanide . 3. Laboratory settings often use potassium ferricyanide or potassium periodate for the catalyst. 4. The best known is probably a process using ammonium ferric citrate and potassium ferricyanide . 5. In histology, potassium ferricyanide is used to detect ferrous iron in biological tissue. 6. This compound may be synthesized by the oxidative coupling of morphine by potassium ferricyanide . 7. Violent reactions have also been reported with acetaldehyde, hypochlorite solutions, potassium ferricyanide and peroxides. 8. Another osmium compound, osmium ferricyanide ( OsFeCN ), exhibits similar fixing and staining action. 9. Both ferricyanide and dichromate are tightly regulated for sewer disposal from commercial premises in some areas. 10. This is followed by a complex reaction of the iron ( II ) complex with ferricyanide .
