Tetrasodium hexacyanoferrate
Sodium ferrocyanide
CAS: 13601-19-9
Molecular Formula: C6FeN6.4Na
Tetrasodium hexacyanoferrate - Names and Identifiers
| Name | Sodium ferrocyanide |
| Synonyms | Sodium ferrocyanide Sodium hexacyanoferr Sodium hexacyanoferrate Sodiumhexacyanoferrat(II) sodium hexacyanoferrate(4-) Tetrasodium hexacyanoferrate SodiuM hexacyanoferrate(III) tetrasodium hexacyanoferrate Sodium ferrocyanide anhydrous Sodium ferrocyanide AldrichCPR Tetrasodium hexakiscyano ferrate(4-) |
| CAS | 13601-19-9 |
| EINECS | 237-081-9 |
| InChI | InChI=1/12CN.2Fe.4Na/c12*1-2;;;;;;/q;;;;;;;;;;;;2*-2;4*+1/r2C6FeN6.4Na/c2*8-1-7(2-9,3-10,4-11,5-12)6-13;;;;/q2*-2;4*+1 |
Tetrasodium hexacyanoferrate - Physico-chemical Properties
| Molecular Formula | C6FeN6.4Na |
| Molar Mass | 303.91 |
| Density | 1.458 |
| Melting Point | 82°C -10H₂O |
| Boling Point | 25.7℃ at 760 mmHg |
| Water Solubility | soluble |
| Solubility | Soluble in water, insoluble in alcohol. |
| Appearance | Odor-free yellow solid |
| Merck | 14,8616 |
| Storage Condition | RT, dark |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| MDL | MFCD00085360 |
| Physical and Chemical Properties | Traits lemon yellow monoclinic prismatic or needle-like crystals. relative density 1.458 solubility soluble in water, insoluble in alcohol. |
| Use | Used as photographic materials, preparation of red blood salt, pigments, can also be used for steel carburizing, tanning, dyeing, printing, pharmaceutical, etc |
Tetrasodium hexacyanoferrate - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R21/22 - Harmful in contact with skin and if swallowed. R32 - Contact with acids liberates very toxic gas R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S36/37 - Wear suitable protective clothing and gloves. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN1588 |
| Hazard Class | 6.1 |
| Packing Group | III |
Tetrasodium hexacyanoferrate - Upstream Downstream Industry
Tetrasodium hexacyanoferrate - Nature
Open Data Verified Data
lemon-yellow monoclinic prismatic or needle-like crystals. Relative density 1-485. Soluble in water, insoluble in alcohol. It is easy to be weathered in the air, and at a temperature of 50 to 60 degrees C, the crystal will quickly lose the water of crystallization. Drying is carried out at a higher temperature to form a hard mass and anhydrous
Salt. It does not decompose in dilute acid that is not heated, but in concentrated acid that is boiled, free hydrocyanic acid is generated. With silver nitrate, the formation of milky white silver ferrocyanide precipitation. With the role of ferrous sulfate to generate white ferrous cyanide precipitation, followed by oxidation of Prussian blue iron ferrocyanide. Under the influence of the oxidant, oxidation to sodium ferricyanide. When burning strongly, nitrogen gas is completely decomposed to generate sodium cyanide and iron carbide.
Last Update：2024-01-02 23:10:35
Tetrasodium hexacyanoferrate - Hair-making
Open Data Verified Data
- recovery method of by-product of coke oven gas: coke oven gas contains a certain amount of hydrogen cyanide gas, and the cyanide-containing wastewater absorbed by water is desorbed by steam, the released hydrogen cyanide is recycled and absorbed by Soda Ash in the tower filled with iron shavings, and sodium ferrocyanide is obtained by sedimentation and impurity removal. Its
- sodium cyanide-containing waste liquid recovery method: sodium cyanide-containing slag is leached and filtered to obtain sodium cyanide solution, which reacts with calcium chloride and ferrous sulfate to generate sodium ferrocyanide. The reaction was started by heating to 50 ℃ and maintained at 80 ℃ for about 30~40min. The reaction was finished when the content of free cyanide was 0.01% ~ 025%. The solution was filtered through a filter, evaporated under reduced pressure, and the liquid was concentrated to a density of 1.21 to 1. 23, after filtration, cooling crystallization to 20 deg C, and then centrifugal separation, drying at 30~40 deg C, prepared product.
- cyanide melt method: the cyanide melt and ferrous sulfate are added into the reactor according to a certain ratio of ingredients, and reacted under alkaline conditions to generate a mixed solution of sodium ferrocyanide and calcium ferrocyanide and calcium sulfate precipitation, after filtering to remove calcium sulfate and impurities, the clear liquid is added in the decalcification reactor to convert calcium ferrocyanide into sodium ferrocyanide, filter to remove calcium carbonate, and the pure sodium ferrocyanide solution is evaporated, crystallized, separated and dried, A finished product was obtained.
Last Update：2022-01-01 11:01:01
Tetrasodium hexacyanoferrate - Introduction
Lemon yellow monoclinic crystal system prismatic or needle-like crystal.
Last Update：2022-10-16 17:13:37
Tetrasodium hexacyanoferrate - Use
Open Data Verified Data
is the raw material for the manufacture of blue pigment, used in paints, coatings and inks. Used in the printing and dyeing industry to make blue print drawings. The pharmaceutical industry is used as a de-ferrous agent in the production of pharmaceuticals. Also used for steel carburizing, tanning, metal surface anti-corrosion, as well as the preparation of red blood salt.
Last Update：2022-01-01 11:01:00
Tetrasodium hexacyanoferrate - Safety
Open Data Verified Data
It is packed in plastic woven bags and iron barrels lined with polyethylene plastic bags, each with a net weight of 25kg, 35kg, 40kg and 50kg. Should be stored in a ventilated, dry warehouse. Pay attention to moisture, packaging must be tight, avoid sun exposure. It cannot be stored and mixed with acids, alkalis, iron salts and food products. When there is a fire, it can be suppressed by water and sand. The acid-base foam fire extinguishing is not allowed. Toxicity and protection: see potassium ferrocyanide.
Last Update：2022-01-01 11:01:01
Tetrasodium hexacyanoferrate - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| traits | sodium ferrocyanide lemon is yellow monoclinic prismatic or needle-like crystals. |
| use | sodium ferrocyanide is mainly used as bleaching fixing solution, color auxiliary agent, fiber treatment auxiliary agent, cosmetic additive, food additive, etc. for washing and processing of color photosensitive materials. It is mainly used to make blue pigments, paints, inks, and blueprints. It is also used for steel carburizing, tanning, metal surface corrosion protection and as a raw material for the preparation of red blood salt. Salt anticaking agent; crystallization moderator. Used for salt and wine. is the raw material for making blue pigments, used for paints, coatings and inks. Used in the printing and dyeing industry to make blue blueprints. The pharmaceutical industry is used as a deferment in the production of pharmaceuticals. It is also used for steel carburizing, tanning, metal surface corrosion protection, and the preparation of red blood salt. used for the analysis and determination of palladium, silver and osmium, and also used for high-iron reagent used as photographic material, preparation of red blood salt, pigment, etc., can also be used for steel carburizing, tanning, dyeing, printing, pharmacy, etc. |
| identification test | take l0ml of 1% sample solution and add 1ml of ferric chloride test solution (TS-101) to produce dark blue precipitate. Content analysis Accurately weigh about 3g of the sample, put it into a 400ml beaker, add 225ml of water to dissolve, and then carefully add about 25ml of sulfuric acid test solution (TS-240). Add 1 drop of phenanthroline (TS162) under stirring and titrate with 0.1mol/L cerium sulfate until it suddenly changes from orange to pure yellow. 0.1moL/L cerium sulfate per ml is equivalent to sodium ferrocyanide [Na4 Fe(CN) 6?10H2O]96.81mg. |
| toxicity | ADI value is 0~0.025(FAO/WHO,2001). See potassium ferrocyanide. |
| usage limit | FDA,§ 172.490(2000):13 mg/kg. |
| production method | coke oven gas by-product recovery method coke oven gas contains a certain amount of hydrocyanic acid gas. cyanide-containing wastewater absorbed by water is first desorbed by steam, and the released hydrogen cyanide is recycled and absorbed by soda ash in a tower filled with iron shavings, and sodium ferrocyanide is obtained by sedimentation. Its 6HCN + Fe +2Na2CO3 → Na4Fe(CN)6 + H2 +2CO2 + 2H2O sodium cyanide-containing waste liquid recovery method sodium cyanide-containing slag is leached and filtered to obtain sodium cyanide solution, which reacts with calcium chloride and ferrous sulfate to generate sodium ferrocyanide. The reaction starts when heated to 50 ℃, maintains the reaction at 80 ℃ for about 30~40 min, and ends when the free cyanogen content is 0.01% ~ 0.025%. The above-mentioned solution is filtered by a filter, evaporated under reduced pressure, and the liquid is concentrated to a density of 1.2l ~ 1.23, then filtered, cooled and crystallized to 20 ℃, then centrifuged and separated, and dried at 30~40 ℃ to obtain the finished product. Its 6NaCN + FeSO4 + CaCl2 → Na4Fe(CN)6 + CaSO4 + 2NaCl cyanide melt method adds cyanide melt and ferrous sulfate to the reactor according to a certain ratio of ingredients, and reacts under alkaline conditions to generate a mixed solution of sodium ferrocyanide and calcium ferrocyanide and calcium sulfate precipitate. Calcium sulfate and impurities are removed through filtration. The clear liquid is added into the decalcification reactor. Soda alkali is added to convert calcium ferrocyanide into sodium ferrocyanide, and calcium carbonate is filtered to remove, the pure sodium ferrocyanide solution is evaporated, crystallized, separated, and dried to obtain the finished product. Its 4Ca(CN)2 + 4NaCN +2FeSO4 → Ca2Fe(CN)6 + Na4Fe(CN)6+2CaSO4 ↓ Ca2Fe(CN)6+2Na2CO3 → Na4Fe(CN)6+2CaCO3 ↓ is obtained by reacting sodium cyanide solution with ferrous sulfate and calcium chloride, and then separating by concentration and crystallization. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Raw Materials for Tetrasodium hexacyanoferrate