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Tripotassium hexacyanoferrate
Potassium hexacyanoferrate (III)
Red prussiate
Potassium iron(III)cyanide
CAS 409-16-5
Assay 99%min
Packing 25kg/bag
Potassium ferricyanide
| Name | Potassium ferricyanide |
| Synonyms | Tripotassium hexacyanoferrate; Potassium hexacyanoferrate (III); Red prussiate |
| Molecular Formula | K3.[Fe(CN)6] |
| Molecular Weight | 329.24 |
| CAS Registry Number | 13746-66-2 (409-16-5) |
| EC Number | 237-323-3 |
Specification:
Specifications | Industrial Grade | Reagent Grade | |||||
Item | Best Grade | Superior Grade | First Grade | Photo Grade | GR | AR | CP |
K3Fe(CN)6 % min | 99.5 | 99.5 | 99.3 | 99.0 | 99.5 | 99.5 | 99.0 |
Chloride (Cl-), % max | 0.1 | 0.1 | 0.15 | 0.2 | 0.005 | 0.005 | 0.02 |
K4Fe(CN)6 % max | 0.16 | 0.16 | 0.22 | 0.4 | 0.005 | 0.02 | 0.1 |
Water Insoluble % max | 0.01 | 0.01 | 0.02 | 0.02 | 0.005 | 0.005 | 0.01 |
Sulfate(SO4) % max | N/A | N/A | N/A | N/A | 0.005 | 0.005 | 0.01 |
Na+ % max | 0.15 | N/A | N/A | N/A | 0.005 | 0.02 | N/A |
Appearance：Deep red or red monoclinic columnar crystals or powders.with a yellow aqueous solution.
Uses:
1.Analytical Chemistry:
Detecting ferrous ions (Fe ² ⁺) to generate a deep blue Teng's blue precipitate, which is a classic qualitative analysis method
2.Photography and Art:
Used for cyanotype, developed by reacting with ferric ammonium citrate to create permanent blue images.
3.Electrochemistry:
As a redox pair of [Fe (CN) ₆] ³ ⁻/[Fe (CN) ₆] ⁴⁻, it is used in cyclic voltammetry, biosensors, and supercapacitor media.
4.Industrial applications:
Used for printing and dyeing (dyeing aniline black), photographic development, electroplating, leather making,
metal surface treatment, and engineering blueprint replication.
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