Potassium iron (III) cyanide
Potassium ferricyanide
CAS: 13746-66-2
Molecular Formula: C6FeN6.3K
Potassium iron (III) cyanide - Names and Identifiers
| Name | Potassium ferricyanide |
| Synonyms | Red prussiate Potassium ferricyanide Dipotassium hexacyanoferrate Potassium iron (III) cyanide tripotassium hexacyanoferrate Tripotassium hexacyanoferrate Potassium Ferricyanide, crystal Potassium hexacyanoferrate(III) Potassium ferricyanide, for analysis Potassium ferricyanide, for analysis ACS |
| CAS | 13746-66-2 |
| EINECS | 237-323-3 |
| InChI | InChI=1/6CN.Fe.3K/c6*1-2;;;;/q;;;;;;-2;3*+1/rC6FeN6.3K/c8-1-7(2-9,3-10,4-11,5-12)6-13;;;/q-2;3*+1 |
| InChIKey | MIMJFNVDBPUTPB-UHFFFAOYSA-N |
Potassium iron (III) cyanide - Physico-chemical Properties
| Molecular Formula | C6FeN6.3K |
| Molar Mass | 329.24 |
| Density | 1.85 |
| Melting Point | °Cd ec.) |
| Boling Point | 25.7℃ at 760 mmHg |
| Water Solubility | 464 g/L (20 ºC) |
| Solubility | H2O: 1M at20°C, complete, orange-brown |
| Vapor Presure | 0Pa at 20℃ |
| Appearance | Crystallization |
| Specific Gravity | 1.88 |
| Color | Orange to red |
| Odor | Odorless |
| Exposure Limit | ACGIH: TWA 1 mg/m3NIOSH: IDLH 25 mg/m3; TWA 1 mg/m3 |
| Merck | 14,7630 |
| PH | 6-9 (25℃, 1M in H2O) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable. Incompatible with ammonia, strong acids, strong oxidizing agents. Reaction with acids yields toxic gas. May discolour on exposure to light. |
| Sensitive | Light Sensitive |
| MDL | MFCD00011392 |
| Physical and Chemical Properties | Traits deep red or red monoclinic columnar crystals or powder. relative density 1.85 solubility: soluble in water and acetone, insoluble in ethanol, methyl acetate and liquid ammonia. |
| Use | Used in photographic paper, pigment, leather, printing, pharmaceutical, fertilizer, mordant, electroplating, paper, steel and other industries |
Potassium iron (III) cyanide - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R32 - Contact with acids liberates very toxic gas R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S50A - S36 - Wear suitable protective clothing. |
| UN IDs | UN 3077 9 / PGIII |
| WGK Germany | 2 |
| RTECS | LJ8225000 |
| FLUKA BRAND F CODES | 8 |
| TSCA | Yes |
| HS Code | 28372000 |
Potassium iron (III) cyanide - Upstream Downstream Industry
| Raw Materials | Potassium permanganate Chlorine Potassium hexacyanoferrate Hydrochloric acid |
| Downstream Products | Potassium ferricyanide trimethoprim adrenochrome semicarbazone |
Potassium iron (III) cyanide - Reference
| Reference Show more | 1. Chen Jianbing, Li Yingdi, Tan Xing and Xia Qile, Cao Yan. Antioxidant and Antitumor Activities of Pectin Modified by Subcritical Water [J]. Food Science and Technology 2020 45(06):316-321. 2. Li Zhi. Study on Ultrasonic Extraction Technology and Antioxidant Activity of Total Flavonoids from Coix Seed [J]. Journal of Sichuan Institute of Technology: Natural Science Edition, 2019, 32(01):16-23. 3. Meng Qingyu, Fu Ling, Gao Zhen, Yin Fen, Yao Hanchun, Bi Yuefeng. Comparison of Extraction Methods and Antioxidant Activity of Total Flavonoids from Chrysanthemum indicum [J]. Chinese herbal medicine, 2015,46(21):3194-3197. 4. Lu Dandan, Mao Xiaoying. Action mode and antioxidant activity of walnut polyphenols and proteins [J]. Food Industry Science and Technology, 2019, 040(013):23-28. 5. Bo Yingyi, Zhang Yuehui, Yangliu, etc. Study on Different Extraction Methods and Antioxidant Activity of Total Flavonoids from Ground Parts of Glycyrrhiza uralensis [J]. Journal of Tianjin University of Traditional Chinese Medicine, 2020(2). 6. Xiaoli, Zhao Ruixiang, Jiang Jianfu, Liu Chonghuai, Niu Shengyang. Optimization of Extraction Process and Determination of Antioxidant Capacity of Douglas Fir from Grape Skin Residue [J]. Food Industry Technology, 2021,42(05):200-205 220. 7. Zhao Lu, Yin Guoli, Zou Chengmei, Hu Ting. Adsorption Kinetics and Thermodynamics of Polyphenols from Kudingcha by Macroporous Adsorption Resin [J]. Chinese medicine guide, 2020,26(16):39-44. 8. [IF = 4.311] Cunyin Zhang et al."Semi-solid reactive interfaces based on ZnO @ C core-shell materials for zinc-ironflow batteries." Chem Eng Sci. 2022 Mar;250:117402 9. [IF = 15.881] Kaixin Zhang et al."Prussian Blue/Calcium Peroxide Nanocomposites-Mediated Tumor Cell Iron Mineralization for Treatment of Experimental Lung Adenocarcinoma." AcsNano. 2021;XXXX(XXX):XXX-XXX 10. [IF = 9.127] Fujun Chu et al."Semi-solid zinc slurry with abundant electron-ion transfer interfaces for aqueous zinc-based flow batteries." JOURNAL OF POWER SOURCES. 2022 Jul;535:231442 |
Potassium iron (III) cyanide - Nature
Open Data Verified Data
Dark Red columnar crystals or orange-yellow powder. d 1. 89. Soluble in 2.5 parts of cold water, 1.3 parts of boiling water and acetone, insoluble in ethanol. When the sun or soluble in water are unstable, can be decomposed by acid. Dark blue precipitates were formed in the presence of ferrous salts. By high heat decomposition, emission of corrosive, irritating smoke.
Last Update：2025-06-10 22:55:16
Potassium iron (III) cyanide - Preparation Method
Open Data Verified Data
analysis and determination of high iron, cesium, gallium, mercury, zinc, uranium dioxide, etc. For the synthesis of inorganic complexes, film printing, electroplating industry.
Last Update：2022-01-01 09:26:33
Potassium iron (III) cyanide - Introduction
Its hot solution can be decomposed by acid, releasing highly toxic hydrogen cyanide gas. In case of ferrous salt, blue precipitate is formed. Can be reduced to potassium ferrocyanide by light and reducing agents. Slowly soluble in 2.5 parts of cold water, 1.3 parts of boiling water, slightly soluble in ethanol. Its aqueous solution gradually separates during storage. Minimum lethal dose (rat, oral) 1600mg/kg. Red transparent crystal, soluble in water and acetone, insoluble in ethanol and liquid ammonia.
Last Update：2022-10-16 17:13:41
Potassium iron (III) cyanide - Preparation Method
Open Data Verified Data
Industrial potassium ferricyanide was dissolved in water. Filtration, cooling, Suction filtration of the precipitated crystals, washing. Dry at room temperature to obtain pure potassium ferricyanide.
Last Update：2025-06-10 22:55:16
Potassium iron (III) cyanide - Safety
Open Data Verified Data
mouse oral LD50: 2970mg/kg. In the experiment of rats, kidney damage was mainly seen. Should be stored separately from oxidants and acids.
Last Update：2022-01-01 09:26:34
Potassium iron (III) cyanide - Reference Information
| pH indicator color change ph range | 6 - 9 at 329g/l at 25 c |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| solubility in water (g/100ml) | dissolution grams per 100ml of water at different temperatures (℃): 30.2g/0 ℃;38g/10 ℃;46g/20 ℃;53g/30 ℃;59.3g/40 ℃ 70g/60 ℃;91g/100 ℃ |
| toxicity | this product is non-toxic. But scorching decomposition or acid produces highly toxic cyanide, see potassium cyanide for protective measures. |
| use | used for printing plate making, oxidation, bleaching and coloring of color film films, printing blueprint paper and pharmacy, electroplating, leather making, papermaking, soap making, etc. used for printing plate making, oxidation, bleaching and coloring of color film films, photographic printing and development, and printing blue drawings, pharmaceutical (antibacterial synergist, PMP, etc.), blue marking powder for cutting. It is also used for electroplating, tanning, paper making and fertilizer. It is used for dyeing aniline black in printing and dyeing industry, carburizing agent in iron and steel industry, and molybdenum ore flotation agent. used as a reagent for the determination of zinc, also used in the synthesis of inorganic complexes, film printing used in photographic paper, pigments, leather making, printing, pharmaceuticals, fertilizers, mordant, electroplating, papermaking, steel and other industries reagents for chromatographic analysis, drip analysis and determination of high iron, cesium, gallium, mercury, zinc and uranium dioxide, etc. A moderating oxidant for organic synthesis. Sulfur content analysis of methanol production from nitrogen fertilizer. Analysis of wastewater in the production of pesticide weed ether. |
| production method | chlorine oxidation method yellow blood salt potassium hot solution is oxidized at about 60~65 ℃ under the action of chlorine to generate red blood salt potassium. When the pH value of the reaction feed liquid is controlled to be 6~7, the chlorine gas is stopped, and then potassium permanganate saturated solution is added, and the test of ammonium ferrate sulfate is brown-red. Use hydrochloric acid to adjust the pH value of the material to make the pH value 7~8. After the reaction, the material is settled, filtered, and evaporated in vacuum until the relative density of the solution is 1.2, and then cooled and crystallized, centrifuged, and dried to obtain the red blood potassium salt product. Its 2 K4Fe(CN)6 C12 → 2 K3Fe(CN)6 2 KCl3K4Fe(CN)6 KMnO4 2H2O → 3 K3Fe(CN)6 MnO2 4KOH electrolysis the saturated solution of yellow blood salt potassium is electrolyzed below 60 ℃, so that yellow blood salt potassium undergoes self-coupling oxidation-reduction reaction to generate red blood salt potassium and by-product potassium hydroxide. When the content of potassium iron cyanide in the electrolyte reaches 320/L, cooling crystallization is started, and the concentration is reduced to 280g/L, then separation and drying are carried out to obtain the finished potassium red blood salt. Its 2 K4Fe(CN)6 2H2O → 2 K3Fe(CN)6 2KOH H2 ↑ |
Last Update：2024-04-10 22:29:15
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Raw Materials for Potassium iron (III) cyanide
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