柠檬酸铁铵(易潮解)
Ferric ammonium citrate, brown
CAS: 1185-57-5
Molecular Formula: C6H11FeNO7
柠檬酸铁铵(易潮解) - Names and Identifiers
柠檬酸铁铵(易潮解) - Physico-chemical Properties
| Molecular Formula | C6H11FeNO7 |
| Molar Mass | 265 |
| Density | 1.06[at 20℃] |
| Melting Point | >193°C (dec.) |
| Boling Point | 498℃[at 101 325 Pa] |
| Water Solubility | 1200 g/L (20 ºC) |
| Solubility | 1200g/l |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Light brown yellow to brown powder |
| Color | Green |
| Odor | Odorless to slight ammonia odor |
| Exposure Limit | ACGIH: TWA 1 mg/m3NIOSH: TWA 1 mg/m3 |
| Merck | 14,4017 |
| PH | 6-8 (100g/l, H2O, 20℃) |
| Storage Condition | Store at RT. |
| Stability | Hygroscopic |
| Sensitive | Hygroscopic |
| MDL | MFCD00013099 |
| Physical and Chemical Properties | Water-soluble 1200g/L (20°C) |
| Use | For the pharmaceutical industry |
柠檬酸铁铵(易潮解) - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | UN 9118 |
| WGK Germany | 3 |
| RTECS | GE7540000 |
| FLUKA BRAND F CODES | 3-8 |
| TSCA | Yes |
| HS Code | 29181500 |
| Toxicity | LD50 orally in Rabbit: > 2000 mg/kg |
柠檬酸铁铵(易潮解) - Reference
| Reference Show more | 1. Wang Z, Gao X, Li W, Tan S, Zheng Q. Phenolic content, antioxidant capacity, and α-amylase and α-glucosidase inhibitory activities of Dimocarpus longan Lour. Food Sci Biotechnol. 2019;29(5):683-692. Published 2019 Dec 23. doi:10.1007/s10068-019-00708-3 |
柠檬酸铁铵(易潮解) - Reference Information
| LogP | -0.737 at 25℃ |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | ferric ammonium citrate, also known as ferric ammonium citrate, has two kinds of brown and green, has odorless, salty taste and iron fishy smell, and is very easy to absorb moisture. light can be reduced to ferrous salt. the solution is more unstable, soluble in water, insoluble in organic solvents such as ethanol and ether, and the aqueous solution is neutral, green is more likely to be restored to light than brown. Brown scaly ferric ammonium citrate has a higher iron content, while green scaly ferric ammonium citrate has a lower iron content. |
| use | ferric ammonium citrate is an excellent nutritional fortifier, which can be used as a blood tonic to treat iron deficiency anemia, and is widely used in food additives, medicine and many other fields. Brown scaly ferric ammonium citrate has a higher iron content, while green scaly ferric ammonium citrate has a lower iron content. Nutritional supplements. Iron fortifier, anti-anemia iron (1~2g orally). Can be added to biscuits and milk powder. Not suitable for food that is not suitable for coloring. As a food iron fortifier, ammonium ferric citrate has better absorption effect than inorganic iron. China stipulates that it can be used for salt and sandwich sugar, and the usage amount is 4000~8000 mg/kg; 1200~1350 mg/kg in high-iron cereals and their products (50g of such foods are limited daily); 400~800 mg/kg in dairy products and infant food; 160~330 mg/kg in cereals and their products; 70~140 mg/kg in beverages. used in pharmaceutical industry used in photography industry, pharmaceutical industry nutritional supplement (iron fortifier). Used for dairy products, wheat flour for bread, etc. Also used as an anti-caking agent. bacterial culture medium, aluminum test, photography, blue print, blood supplement, etc. Brown products are used as blood tonic to treat iron deficiency anemia; they can be used as food additives. According to Japan's "Food Additives", the iron content is 16.5%-21.2%. Brown products and green products are chemically sensitive substances, and green products are more sensitive than brown products. Paper coated with green ammonium ferric citrate and red blood salt (potassium ferricyanide) is called blue blueprint. At the time of exposure, the trivalent iron in the citrate was originally divalent, and Teng's blue was produced when exposed to water, so the light-receiving part turned blue, and the non-light part was still white. A white line pattern on a blue background could be obtained. |
| production method | iron hydroxide is dissolved in citric acid, mixed with ammonia water, and then dried. (1) preparation of ferric hydroxide ferrous sulfate is added to water, sulfuric acid is slowly added under stirring, and then sodium chlorate aqueous solution is added. Then stir vigorously, the temperature rises above 80 ℃, and then add sodium chlorate. Stir until the reaction is terminated (check with potassium ferricyanide for ferrous iron reaction) to obtain ferric sulfate solution. Add this solution into the reaction tank, add sodium hydroxide solution, stir vigorously, the reaction temperature is 80-90 ℃, when the reaction liquid changes from viscous to thin, add water to wash until sulfate and chlorine meet the requirements. Drain to obtain ferric hydroxide. (2) preparation of ammonium ferric citrate citric acid, ferric hydroxide and water are added into the reaction tank, stirred, the temperature is controlled above 95 ℃, and the temperature is kept for 1h. Then cool to 50 ℃, stir and pass ammonia. Let stand for more than 48h. The supernatant was filtered, the filtrate was concentrated into a paste, and dried at 80 ℃ to obtain ferric ammonium citrate. The total yield of ferrous sulfate is 73-75%. Same as the preparation method 2 in brown ferric ammonium citrate. Add ammonia water to the ferric sulfate solution to generate ferric hydroxide precipitate; filter, wash with water until there is no sulfuric acid reaction, then add citric acid, and heat to 60 ℃ to dissolve all the precipitate; then neutralize with ammonia water, Concentrate to syrup, and coat on a glass plate, peel off to form a small flake finished product after micro-temperature drying. Fe2(SO4)3+6NH3 + 6H2O → 3(NH4)2SO4+2Fe(OH)3 ↓ 2C6H8O7 + 3NH4OH + Fe(OH)3 →(C6H5O7)2Fe(NH4)3 + 6H2O can also be ferrous sulfate as raw material, 28g FeSO4 · 7H2O is dissolved in 4rnL water, 98% concentrated sulfuric acid 3 rnL is added, and then 5mL 36% hydrogen peroxide is added dropwise, and the temperature is increased to 83 ℃, stir for 0.5h, use potassium ferricyanide to test blue as the end point of the reaction; Then add 100mL of distilled water, stir at 80 ℃ to add 40% NaOH to make the solution alkaline, filter the precipitate, and wash with hot water until there is no sulfate. The prepared Fe(OH)3 is added to a solution of 100mL water dissolved in 14g citric acid, and stirred at a constant temperature of 95 ℃ for 1h. Then cool to 50 ℃, then add an appropriate amount of ammonia water, cool to room temperature, let stand for clarification, evaporate and concentrate the supernatant to paste, and dry at 60~80 ℃ to obtain the product with a yield of 91%. the iron hydroxide made of ferric sulfate and ammonia water is added with a considerable amount of citric acid solution, the slurry obtained by concentration is coated on the glass plate, and then peeled from the glass plate after drying. Iron hydroxide is obtained by dissolving in citric acid, neutralizing with ammonia water, and evaporating below 60°C. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD: > 2000 mg/kg |
| flammability hazard characteristics | combustible, iron-containing fire is emitted from the fire site, and nitrogen oxides are spicy to stimulate smoke |
| storage and transportation characteristics | warehouse low temperature, ventilation, drying |
| fire extinguishing agent | water, carbon dioxide, dry powder, sand |
| occupational standard | TWA 1 mg/m3 |
| 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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