KFCT
Potassium hexacyanoferrate(II) trihydrate
CAS: 14459-95-1
Molecular Formula: C6H2FeKN6O-3
KFCT - Names and Identifiers
KFCT - Physico-chemical Properties
| Molecular Formula | C6H2FeKN6O-3 |
| Molar Mass | 269.07 |
| Density | 1.85 |
| Melting Point | 70°C(lit.) |
| Boling Point | 25.7°C at 760 mmHg |
| Water Solubility | 270 g/L (12 ºC) |
| Solubility | Soluble in 5 parts of water, soluble in acetone, insoluble in ethanol and ether |
| Vapor Presure | 740mmHg at 25°C |
| Appearance | Yellow crystals or particles |
| Specific Gravity | 1.85 |
| Color | Yellow |
| Odor | Odorless |
| Exposure Limit | ACGIH: TWA 1 mg/m3NIOSH: IDLH 25 mg/m3; TWA 1 mg/m3 |
| Merck | 14,7631 |
| PH | 9.5 (100g/l, H2O, 20℃)(anhydrous substance) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable. Incompatible with oxidizing agents, stong acids (may generate very toxic HCN). Not combustible. |
| Sensitive | Sensitive to light and easy to absorb moisture |
| MDL | MFCD00167023 |
| Physical and Chemical Properties | Trait lemon yellow monoclinic columnar crystal or powder, sometimes cubic metamorphosis. relative density 1.85 solubility: soluble in water, insoluble in ethanol, ether, methyl acetate and liquid ammonia. |
| Use | Used in the manufacture of pigments, printing and dyeing oxidation aids, potassium cyanide, explosives and chemical reagents, also used in steel heat treatment, lithographic, engraving, etc |
KFCT - 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. R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S36 - Wear suitable protective clothing. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S47 - Keep at temperature not exceeding... |
| UN IDs | 1588 |
| WGK Germany | 2 |
| RTECS | LJ9219000 |
| FLUKA BRAND F CODES | 8 |
| TSCA | Yes |
| HS Code | 28372000 |
| Toxicity | LD50 orally in Rabbit: 3613 mg/kg |
KFCT - Upstream Downstream Industry
| Raw Materials | Ferrous sulfate Potassium chloride Potassium carbonate Calcium oxide Ammonia |
| Downstream Products | Sodium Chloride Sodium ferrocyanide Potassium ferricyanide Potassium hexacyanoferrate |
KFCT - Reference
| Reference Show more | 1. Yu Sijie, OH YOUNG JOO, Li Hongjun, KIM TAE SUK, He Zhifei, LEE SANG YUN, Li Shaobo, Li Minhan. Studies on Physical and Chemical Components and Antioxidant Activities of Liquid and Solid Enzymes [J]. Food and Fermentation Industry, 2020,46(13):85-91. 2. Gao Jin, Zhao Jing, Tang che, et al. Determination of Choline in Milk Powder by High Performance Liquid Chromatography-High Resolution Mass Spectrometry-Isotope Internal Standard Method [J]. Journal of Food Safety and Quality Testing, 2018(20). 3. [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 |
KFCT - Nature
Open Data Verified Data
light yellow monoclinic crystals. Easy to wind. Stable at room temperature, heating to 60 °c began to lose the water of crystallization, heat to 100 °c into a hygroscopic white powder. Soluble in water, insoluble in ethanol, ether, methyl acetate and liquid ammonia. In the case of halogen, peroxide, the formation of potassium ferricyanide. Strong burning, decomposition and release of ammonia, and the formation of potassium cyanide and iron carbide. Its aqueous solution is decomposed into ferric hydroxide when exposed to light. In the case of nitric acid, the first formation of red blood salt potassium, followed by the formation of Nitro containing iron cyanide.
Last Update：2025-06-10 22:55:16
KFCT - Preparation Method
Open Data Verified Data
Industrial potassium ferrocyanide trihydrate was dissolved in water, and barium hydroxide was added to remove SO ~-. After filtration and evaporation of the filtrate to a relative density of 1.2, a small amount of activated carbon was added, followed by filtration and cooling. The precipitated crystals were suction-filtered, washed with water, and dried to obtain pure potassium ferrocyanide.
Last Update：2025-06-10 22:55:16
KFCT - Introduction
High iron reagent (forming Prussian blue). Verification of iron, copper, zinc, palladium, silver, osmium and protein reagents, urine test.
Last Update：2022-10-16 17:13:58
KFCT - Application
Open Data Verified Data
Analytical reagents for drop analysis of iron, copper, zinc, palladium, silver, osmium, uranium and proteins, urine tests and imaging agents.
Last Update：2025-08-19 16:24:40
KFCT - Safety
Open Data Verified Data
non-toxic. But the production of raw materials and products of cyanide thermal decomposition of cyanide poisoning. Not with acids, alkalis, iron salts and edible goods storage and mixed transport. Fire can be suppressed with water and sand. Acid-base or foam fire retardants are not available.
Last Update：2025-06-10 22:55:16
KFCT - Reference Information
| pH indicator color change ph range | 8 - 10 at 211g/l at 25 c |
| toxicity | this product is non-toxic. But its production raw material cyanide and the cyanide produced by the thermal decomposition of the product are highly toxic. For the treatment and protective measures of cyanide produced during production or decomposition, see Potassium Cyanide. |
| Uses | Used in the manufacture of pigments, printing and dyeing oxidation auxiliaries, potassium cyanide, explosives and chemical reagents, as well as heat treatment, lithography, engraving, etc. Used as analytical reagents, chromatographic reagents and developer Used in the manufacture of pigments, printing and dyeing oxidation auxiliaries, paints, inks, potassium red blood salt, explosives and chemical reagents, it is also used in steel heat treatment, lithography, engraving and medicine industries. Its food additive grade products are mainly used as anti-caking agents for table salt. Used as manufacturing pigments, printing and dyeing oxidation auxiliaries, potassium cyanide, explosives and chemical reagents, and also used for steel heat treatment, lithography, engraving, etc. High-iron reagent (forming Prussian blue). Verification of iron, copper, zinc, palladium, silver, osmium and protein reagents, urine test. Drop analysis of palladium, osmium and uranium |
| production method | cyanide melt method after the cyanide melt is extracted with water, ferrous sulfate is added to form a complex, and the impurity is removed by pressure filtration. sodium ferrocyanide and calcium ferrocyanide in the filtrate react with potassium chloride at 75 ℃ to generate potassium ferrocyanide calcium double salt precipitation. after pressure filtration, the content of sodium xanthate in the filtrate should be <5g/L, the filter cake is at a temperature of 70~80 ℃, plus an appropriate amount of soda ash to decalcize it, remove the precipitated sludge after decalcification, heat the filtrate and add excessive potassium chloride, and convert all the sodium yellow blood salt in the filtrate into potassium yellow blood salt. After all the above reactions are completed, the potassium ferrocyanide finished product is prepared by cooling crystallization, centrifugal separation and drying. Its 6NaCN FeSO4 → Na4Fe(CN)6 Na2SO43Ca(CN)2 FeSO4 → Ca2Fe(CN)6 CaSO4 ↓ Ca2Fe(CN)6 2KCI → K2CaFe(CN)6 ↓ CaC12Na4Fe(CN)6 2KCl CaCl2 → K2CaFe(CN)6 ↓ 4 NaCI2K2CaFe(CN)6 2Na2CO3 → K4Fe(CN)6 Na4Fe(CN)6 2CaCO3 ↓ Na4Fe(CN)6 4KCl → K4Fe(CN)) 6 4NaCl sodium cyanide waste liquid recovery method initially reacts the recovered sodium cyanide waste liquid with calcium chloride and ferrous sulfate, filtration removes calcium sulfate precipitate, filtrate reacts with appropriate amount of soda ash to completely decalcize, remove calcium carbonate residue, and then react with potassium chloride to generate potassium ferrocyanide. After filtration, cooling crystallization, centrifugal separation and air drying, potassium ferrocyanide finished product is prepared. its 6NaCN FeSO4 CaCl2 → Na4Fe(CN)6 CaSO4 ↓ 2 NaClNa4Fe(CN)6 4KCl → K4Fe(CN)6 4NaCl cyanide-containing wastewater recovery method cyanide-containing wastewater is heated by steam to escape hydrogen cyanide gas, and then potassium carbonate solution is used to recycle and absorb hydrogen cyanide gas in an absorption tower filled with iron shavings to convert it into potassium ferrocyanide. Its 6HCN Fe 2K2CO3 → K4Fe(CN)6 H2 ↑ 2CO2 ↑ 2H2O |
Last Update：2024-04-10 22:29:15
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Raw Materials for KFCT
Downstream Products for KFCT