7720-78-7
Ferrous sulfate
CAS: 7720-78-7
Molecular Formula: FeO4S
7720-78-7 - Names and Identifiers
| Name | Ferrous sulfate |
| Synonyms | Feosol COPPERAS Duroferon Fer-In-Sol Ferrous sulfate FERROUS SULFATE Iron(Ⅱ) sulfate Ferrous sulphate FERROIN SOLUTION Iron monosulfate IRON(II) SULFATE FERROUS SULPHATE IRON (II) SULFATE ferric potassium alum potassium ferric sulfate |
| CAS | 7720-78-7 |
| EINECS | 231-753-5 |
| InChI | InChI=1/Fe.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/p-2 |
7720-78-7 - Physico-chemical Properties
| Molecular Formula | FeO4S |
| Molar Mass | 151.91 |
| Density | 3.650 |
| Melting Point | decomposes at 671℃ [JAN85] |
| Water Solubility | g/100g solution H2O: 13.6 (0°C), 22.8 (25°C), 24.0 (100°C); solid phase, FeSO4 · 7H2O (0°C, 25°C), FeSO4 ·H2O (100°C) [KRU93] |
| Vapor Presure | 0Pa at 20℃ |
| Appearance | white orthorhombic crystals |
| Storage Condition | Store at +15°C to +25°C. |
| Physical and Chemical Properties | Blue-green monoclinic crystals or particles, no odor. |
| Use | For iron salt, iron oxide pigment, mordant, water purification agent, preservatives, disinfectants, medicine as anti-anemia drugs |
7720-78-7 - Risk and Safety
| Risk Codes | 25 - Toxic if swallowed |
| Safety Description | 45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| HS Code | 28332910 |
| Toxicity | LD50 oral in rat: 319mg/kg |
7720-78-7 - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Iron |
| Downstream Products | Sodium ferrocyanide Iron (III) oxide monohydrate C.I. Pigment Black 11 kanamycin sulfate mixture of components A |
7720-78-7 - Reference
| Reference Show more | 1. Zhang Meng, Cao Tingting, Cheng Lagerstroemia, Jin Wenyuan, Jin Peng, Zheng Yonghua. Effects of high humidity storage on chilling injury and antioxidant activity of green pepper fruit [J]. Food Science, 2021,42(03):243-250. 2. [IF = 4.952] Tahidul Slam et al."Phenic profiles, anti-oxidant capabilities and metal chelling ability of edible mushrooms commonly consumed in China." Lwt Food Sci Technol. 2016 Oct;72:423 3. Ziyun Xu et al. [IF = 7.514]. "Effects of UV-C treatment and ultrafine-grinding on the biotransformation of ergostol to vitamin D2, physio chemical properties, and antioxidant properties of shiitake and Jew's ear."Food Chem. 2020 Mar;309:125738 4. [IF=4.952] Lihua Yang et al."Extraction of low molecular weight peptides from bovine bone using ultrasound-assisted double enzyme hydrolysis: Impact on the antioxidant activities of the extracted peptides."Lwt Food Sci Technol. 2021 Jul;146:111470 |
7720-78-7 - Nature
Open Data Verified Data
blue-green monoclinic crystals or particles, no odor. The relative density was 1. 898. Melting Point 64 °c. Soluble in water (50 ° C when 48. 6g/lOOmL water). Slightly soluble in alcohol, soluble in anhydrous methanol. 64~90 deg C when the loss of 6 crystal water, heated to 300 deg C when the loss of all crystal water into anhydrous. Red heat when the decomposition of iron oxide and the release of sulfur dioxide, sulfur trioxide. Corrosive, weathering in dry air. Easily oxidized by moist air.
Last Update：2024-01-02 23:10:35
7720-78-7 - Preparation Method
Open Data Verified Data
- sulfuric acid method: sulfuric acid is mixed with the mother liquor, and when heated to 80 ° C with steam, the scrap iron is dissolved in the reaction solution, and the slightly acidic ferrous sulfate solution formed by the reaction is clarified to remove impurities, after cooling crystallization, centrifugal dehydration, ferrous sulfate.
- titanium dioxide by-product method: the sulfuric acid decomposition of ilmenite production of titanium dioxide by precipitation, freezing, separation of by-product ferrous sulfate, after recrystallization refined, ferrous sulfate finished product.
Last Update：2022-01-01 11:04:13
7720-78-7 - Use
Open Data Verified Data
agriculture can be used as a pesticide, can control wheat smut, apple and pear scab disease, fruit tree rot disease; Can also be used as fertilizer, can remove the stem of the moss and lichen. It is a raw material for the manufacture of magnetic iron oxide, iron oxide red and iron blue inorganic pigments, iron catalysts and polyferric sulfate. It is used as a local astringent and a blood tonic in medicine. It is also used as a reagent for chromatographic analysis and the like. Food grade used as nutritional supplements, such as iron fortifier, fruit and vegetable color. Feed Grade ferrous sulfate as a supplement to iron in feed processing.
Last Update：2022-01-01 11:04:12
7720-78-7 - Safety
Open Data Verified Data
according to user requirements, you can choose to use bulk or polyethylene plastic bags, straw bags or plastic woven bags, each weight 20kg or 50kg. They were stored in a dry warehouse. Weathering should be prevented. Long storage will turn yellow (by air oxidation to iron). Rain should be prevented during transport. Sun exposure to moisture. It shall not be mixed with hazardous and toxic substances to prevent pollution. When there is a fire, use water and a fire extinguisher.
Last Update：2022-01-01 11:04:13
7720-78-7 - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| The role of ferrous sulfate | ferrous sulfate is an inorganic metal salt material, which can be used as a nutritional supplement (iron fortifier); Fruit and vegetable coloring agent; can also be used for iron salts, iron oxide pigments, mordant, water purification agent, preservatives, disinfectants, medicine as anti-anemia drugs. |
| precautions for oral administration | . 2. Avoid drinking tea and milk during medication. 3. Take after meals can reduce gastrointestinal irritation. The stool may turn black after administration. With anti-acid drugs, bile Amine, trypsin, penicillamine and tetracycline and other drugs used together, can weaken the role of this product. 6. Drugs that can increase the effect of this product are vitamin C and dilute hydrochloric acid. Unfit for the use of drugs are: tannic acid, tannic acid protein and dimercaprol. Hemochromatosis, hemosiderosis, allergic to iron and liver and kidney function in patients with severe damage disabled. The following items should be monitored during treatment: hemoglobin, reticulocyte count, serum ferritin and serum iron. A large number of oral can cause acute poisoning, gastrointestinal bleeding, necrosis, serious can cause Shock, should be treated immediately.|
| Industrial preparation | Natural oxidation pyrite FeS2 can be used in industry, and ferrous sulfate can also be prepared by the reaction of iron chips and dilute sulfuric acid, in addition, it is often recovered as a by-product in chemical production. |
| spontaneous combustion performance | laboratory-made ferrous sulfide begins to emit white smoke within a few seconds when exposed to ambient temperature, the sample and the filter paper were rapidly caused to burn, showing a strong spontaneous combustion phenomenon, in which the ferrous sulfide prepared by the liquid-liquid precipitation method was severely burned and the spontaneous combustion activity was extremely high. |
| content analysis | accurately weigh about 1g of sample, add dilute sulfuric acid test solution (TS-241) 25ml and 25ml of the newly boiled and cooled water were dissolved, then several drops of phenanthroline test solution (TS-162) were added, and immediately titrated with 0.1mol/L cerium sulfate. At the same time, the blank test was carried out, and the necessary correction was made. The equivalent of 0.1mol/L cerium sulfate per mL was equivalent to ferrous sulfate (FeSO4? 7H2O)27.80mg. |
| toxicity | LD50 279-558mg/kg (rat, oral, calculated by Fe). GRAS(FDA,§ 182.5315, § 184.1315,2000). ADI 0.8mg Fe/kg (in Fe; FAO/WHO,2001). |
| usage limit | GB 14880-94(mg/kg): 120~240 for cereals and their products; 960 for high iron cereals and their products; beverage 50~100; Dairy products, infant food 300~500; Salt, sandwich sugar 3000~6000.GB 2760-2002: cocoa powder and other flavors nutritional solid beverages 11~12mg/kg (iron; Equivalent nutritional milk beverages by dilution factor to reduce the use of). |
| Use | nutritional supplement (iron fortifier); Fruit and vegetable coloring agent. Such as salting alum co-used for eggplant pickled products can form a stable complex salt with its pigment, to prevent discoloration caused by organic acids. However, it should be noted that, if the amount of iron is more, it becomes black and dark, and the amount of alum is too much. The meat quality of pickled eggplant is too solid. Formula example: long eggplant 300kg, salt 40kg, ferrous sulfate 100g, alum 500g. It can also be used as a coloring agent for black beans, sugar-boiled beans, kelp, etc. Tannin-containing food, in order to avoid causing blackening, should not be used. Can also be used for sterilization, deodorization, but sterilization is very weak. The hidden color base pigment contained in the beans is colorless in the reduced state, and is oxidized to black under alkaline conditions. The color protection can be achieved by using the reducibility of ferrous sulfate, and the dosage is 0.02% to 0.03%. For iron salt, iron oxide pigment, mordant, water purification agent, preservatives, disinfectants, medicine as anti-anemia drugs. Dried product of ferrous sulfate heptahydrate. |
| production method | dilute sulfuric acid was added to iron filings. The temperature of the aqueous solution during crystallization is <56.6 "C: It is the salt of seven water, the salt of four water is 56.6~64.4 °c, and the salt of one water is> 64.4 °c. |
| category | toxic substances |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50 319 mg/kg; Oral-mouse LD50: 680 mg/kg |
| flammability hazard characteristics | non-combustible; Toxic ferrous fume generated from fire scene |
| storage and transportation characteristics | The warehouse is low temperature, ventilated and dry, and stored separately from food raw materials |
| 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) |
Last Update：2024-04-09 20:02:46
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View History
Raw Materials for 7720-78-7
Downstream Products for 7720-78-7
Sodium ferrocyanide
Iron (III) oxide monohydrate
C.I. Pigment Black 11
kanamycin sulfate mixture of components A
Iron (III) oxide monohydrate
C.I. Pigment Black 11
kanamycin sulfate mixture of components A