Basic information Solubility in water (g/100mL) Chemical properties Applications Preparation Category Toxicity Grading Acute Toxicity Flammability Hazardous Characteristics Storage and Transport Extinguishing Agent Safety Related Supplier
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Ferrous sulfate heptahydrate

Basic information Solubility in water (g/100mL) Chemical properties Applications Preparation Category Toxicity Grading Acute Toxicity Flammability Hazardous Characteristics Storage and Transport Extinguishing Agent Safety Related Supplier
Ferrous sulfate heptahydrate Basic information
Ferrous sulfate heptahydrate Chemical Properties
  • Melting point:64 °C
  • Density 1.897 g/mL at 25 °C
  • vapor pressure 14.6 mm Hg ( 25 °C)
  • storage temp. 2-8°C
  • solubility 25.6 g/100 mL (20°C)
  • form Solution
  • Specific Gravity1.898
  • color Slightly greenish to blue
  • PH3.0-4.0 (25℃, 50mg/mL in H2O)
  • Water Solubility 25.6 g/100 mL (20 ºC)
  • Sensitive Air Sensitive & Hygroscopic
  • Merck 14,4057
  • Stability:Stable. Substances to be avoided include strong oxidizing agents. Air and moisture sensitive.
  • InChIKeySURQXAFEQWPFPV-UHFFFAOYSA-L
  • CAS DataBase Reference7782-63-0(CAS DataBase Reference)
  • EPA Substance Registry SystemSulfuric acid, iron(2+) salt (1:1), heptahydrate(7782-63-0)
Safety Information
  • Hazard Codes Xn,Xi
  • Risk Statements 22-36/38
  • Safety Statements 36/37/39-46
  • RIDADR UN 9125
  • WGK Germany -
  • RTECS NO8510000
  • 10-23
  • TSCA Yes
  • HS Code 28332950
  • ToxicityLD50 in mice: 65 mg/kg i.v.; 1.52 g/kg orally (Hoppe)
MSDS
Ferrous sulfate heptahydrate Usage And Synthesis
  • Solubility in water (g/100mL)Dissolved grams in 100 mL water at different temperatures (°C):
    28.8g/0℃: 40g/10℃;48g/20℃;60g/30℃;73.3g/40℃
    101g/60℃: 79.9g/70℃;68.3g/80℃;57.8g/90℃
  • Chemical propertiesBlue-green crystals (monoclinic system) or granules, odorless. Soluble in water, slightly soluble in alcohol, soluble in anhydrous methanol.
  • ApplicationsAs analytical reagent; as raw material for ferrite; raw material to produce magnetic iron oxide, iron(III) oxide and iron blue inorganic pigment, iron catalyst and poly iron sulfate; as chromatographic reagent. In agriculture, it is used as pesticide in agriculture to control wheat smut, scab of apple and bear, fruit tree decay; as fertilizer to remove moss and lichen of food trunk. Medically it is used as local astringent, blood tonic and anti-anemia.  Ferrous sulfate heptahydrate (feed grade) can be used as the iron fortifier for feed additive. Ferrous sulfate heptahydrate (food grade) is used as nutrition supplements, such as iron fortifier, coloring agent for fruit and vegetable. According to Chinese regulation, it can be used in following foods and with allowed amounts:
    Sweets with filling and salt: 3000~6000 mg/kg;
    Cereals with high iron content and corresponding products (maximum daily consumption 50g): 860~960 mg/kg;
    Dairy and infant foods: 300-500 mg/kg;
    Cereals and corresponding products: 120~140 mg/kg;
    Beverages: 50~100 mg/kg. It is used to produce iron salt, iron oxide pigment, mordant, water purifier, preservatives, disinfectant, etc.
  • Preparation
    • By-product Method: byproduct of titanium dioxide production:
    Titanite is decomposed with sulfuric acid to obtain titanium dioxide, ferrous sulfate(II) and ferric sulfate (III). Iron (III) compounds are reduced to obtain iron (II) compounds. The mixture is then cooled and crystallized to form ferrous sulfate.
    5H2SO4+2FeTiO3→2FeSO4+TiOS04+Ti(SO4)2+5H2O
    • Sulfuric acid method
    Scrap iron is dissolved with a mixture of diluted sulfuric acid solution and mother solution. The reaction temperature should be below 80°C, otherwise, it results in the sedimentation of ferrous sulfate monohydrate. Clarification is applied to remove impurities from the slightly acidic ferrous sulfate solution. Cooling and centrifugation are carried out obtain light-green ferrous sulfate.
    Fe+H2SO4→FeSO4+H2↑
  • CategoryToxic substance
  • Toxicity GradingMiddle toxic
  • Acute Toxicity Oral-rat LD50: 1389 mg/kg; oral-mouse LD50: 1520 mg/kg.
  • Flammability Hazardous CharacteristicsNot flammable, change into ferric oxide smoke at high temperature.
  • Storage and TransportStored in well-ventilated area, low temperature and dry.
  • Extinguishing AgentWater, carbon dioxide, dry powder, sand.
  • Description§184.1315(a) Ferrous sulfate heptahydrate (iron (II) sulfate heptahydrate, FeS04-7H2O) is prepared by the action of sulfuric acid on iron. It occurs as pale, blueish-green crystals or granules. Progressive heating of ferrous sulfate heptahydrate produces ferrous sulfate (dried). Ferrous sulfate (dried) consists primarily of ferrous sulfate monohydrate (CAS No. 17375-41-6) with varying amounts of ferrous sulfate tetrahydrate (CAS No. 20908-72-9) and occurs as a grayish-white to buff-colored powder.
  • Chemical PropertiesFerrous sulfate is a greenish or yellowish solid in fine or lumpy crystals.
  • Chemical Propertieslight blue or light blue-green solid
  • UsesUsed in quantitative analysis of nitrates .
  • UsesIn manufacture of Fe, Fe Compounds, other sulfates; in Fe electroplating baths; in fertilizer; as food and feed supplement; in radiation dosimeters; as reducing agent in chemical processes; as wood preservative; as weed-killer; in prevention of chlorosis in plants; in other pesticides; in writing ink; in process engraving and lithography; as dye for leather; in etching aluminum; in water treatment; in qualitative analysis ("brown ring" test for nitrates); as polymerization catalyst.
  • DefinitionChEBI: A hydrate that is the heptahydrate form of iron(2+) sulfate. It is used as a source of iron in the treatment of iron-deficiency anaemia (generally in liquid-dosage treatments; for solid-dosage treatments, the monohydrate is normally used).
  • General DescriptionA greenish or yellow-brown crystalline solid. Density 15.0 lb /gal. Melts at 64°C and loses the seven waters of hydration at 90°C. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Used for water or sewage treatment, as a fertilizer ingredient.
  • Air & Water ReactionsWater soluble
  • Reactivity ProfileFerrous sulfate heptahydrate is a weak reducing agent.
  • Health HazardINGESTION: abdominal pain, retching, diarrhea, dehydration, shock, pallor, cyanosis, rapid or weak pulse, shallow respiration, low blood pressure.
  • Safety ProfilePoison by intravenous, intraperitoneal, and subcutaneous routes. Moderately toxic by ingestion and rectal routes. Mutation data reported. When heated to decomposition it emits toxic fumes of SOx.
  • Potential ExposureIt is used as a fertilizer, food or feed additive; and in herbicides; process engraving; dyeing, and water treatment. A byproduct of various chemical and metal treating operations.
  • Purification MethodsCrystallise the sulfate from 0.4M H2SO4, or precipitate it from an aqueous solution with EtOH. It is efflorescent in dry air, and is converted to the tetrahydrate at 57o, then to the monohydrate at 65o (or by heating the heptahydrate in a vacuum at 140o). It forms a brown-black complex, FeSO4.NO, with nitric oxide and is used in a qualitative test for nitrates (“brown ring” test).
  • IncompatibilitiesAqueous solution is acidic. Contact with alkalies form iron. Keep away from alkalies, soluble carbo nates; gold and silver salts; lead acetate; lime water, potassium iodide; potassium and sodium tartrate; sodium borate; tannin.
Ferrous sulfate heptahydrate Preparation Products And Raw materials
Ferrous sulfate heptahydrate(7782-63-0)Related Product Information
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