| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| effect of ferrous sulfate | ferrous sulfate is an inorganic metal salt substance and can be used as a nutritional supplement (iron fortifier); fruit and vegetable coloring agent; It can also be used to make iron salts, iron oxide pigments, mordants, water purifiers, preservatives, disinfectants, etc. It is used as an antianemia drug in medicine. |
| oral precautions | 1. patients with ulcer disease, ulcerative colitis and hemolytic anemia should not be used. 2. Avoid drinking tea and milk during medication. 3. Taking after meals can reduce gastrointestinal irritation. 4. Stool may turn black after taking. 5. Use with antacids, cholestyramine, pancreatin, penicillamine and tetracycline, which can weaken the effect of this product. 6. The drugs that can increase the effect of this product include vitamin C and dilute hydrochloric acid. 7. Drugs that are not suitable for use are: tannic acid, tannic acid protein and dimercaptopropanol. 8. Hemochromatosis, hemosiderosis, people who are allergic to iron, and patients with severe liver and kidney damage are contraindicated. 9. The following items should be monitored during treatment: hemoglobin, reticulocyte count, serum ferritin and serum iron, etc. 10. Large amount of oral administration can cause acute poisoning, gastrointestinal hemorrhage and necrosis, and shock in severe cases. It should be treated immediately. |
| industrial preparation | naturally oxidized pyrite FeS2 can be used in industry, and ferrous sulfate can also be produced by the reaction of iron filings and dilute sulfuric acid. In addition, it is often used as a chemical production. A by-product to recover. |
| spontaneous combustion performance | the laboratory-made ferrous sulfide is exposed to the air at normal temperature, and white smoke starts to emit within a few seconds, and quickly causes the sample and filter paper to burn, showing strong spontaneous combustion phenomenon. the ferrous sulfide prepared by liquid-liquid precipitation method burns violently and has extremely high spontaneous combustion activity. |
| content analysis | accurately weigh about 1g of sample, add dilute sulfuric acid test solution (TS-241)25m1 and 25ml of newly boiled and cooled water, add several drops of phenanthroline test solution (TS-162) after dissolution, and immediately titrate with 0.1mol/L high cerium sulfate. At the same time, blank test was carried out and necessary correction was made. 0.1mol/L cerium sulfate per mL was equivalent to ferrous sulfate (FeSO4?7H2O)27.80mg. |
| toxicity | LD50 279~558 mg/kg (rat, oral, calculated as Fe). GRAS(FDA,§ 182.5315, § 184.1315,2000). ADI 0.8mg Fe/kg (calculated as Fe; FAO/WHO,2001). |
| usage limit | GB 14880-94(mg/kg): cereals and their products 120~240; 960 of high-speed rail cereals and their products; Beverages 50~100; Dairy products, infant food 300~500; Salt, sandwich sugar 3000~6000.GB 2760-2002: Cocoa powder and other nutritious solid beverages 11~12mg/kg (based on iron; The amount of equivalent nutritious milk beverage is reduced by dilution). |
| use | nutritional supplement (iron fortifier); Fruit and vegetable coloring agent. For example, pickled products used in eggplant with burnt alum can form stable collaterals with their pigments to prevent discoloration caused by organic acids. However, it should be noted that if the amount of iron is large, it will become black and ink, and if the amount of alum is large, the meat of pickled eggplant will be too solid. Formula example: long eggplant 300kg, salt 40kg, ferrous sulfate 100g, burning alum 500g. It can still be used as a coloring agent for black beans, sugar boiled broad beans, kelp, etc. Foods containing more tannins should not be used to avoid blackening. It can also be used for sterilization and deodorization, but the sterilization power is extremely weak. The cryptochromatic pigments contained in beans are colorless in the reduced state, and black in the alkaline oxidation. The reduction of ferrous sulfate can be used to achieve the purpose of color protection, and the dosage is 0.02% ~ 0.03%. It is used for making iron salt, iron oxide pigment, mordant, water purifier, preservative, disinfectant, etc. It is used as anti anemia drug in medicine. A dry product of ferrous sulfate heptahydrate. |
| production method | dilute sulfuric acid is added to iron filings. When the temperature of the aqueous solution during crystallization is <56.6 "C:, it is salt headahydrate, salt tetrahydrate at 56.6~64.4 ℃, and salt monohydrate at> 64.4 ℃. |
| category | toxic substances |
| toxicity classification | highly toxic |
| acute toxicity | oral administration-rat LD50 319 mg/kg; Oral administration-mouse LD50: 680 mg/kg |
| flammability hazard characteristics | non-combustible; toxic ferrochemical smoke from the fire site |
| storage and transportation characteristics | warehouse is low temperature, ventilated and dry; Store separately from food raw materials |
| fire extinguishing agent | water, carbon dioxide, dry powder, sand |
| occupational standard | TWA 1 mg (iron)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
