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Encyclopedia > Iron(II) sulfate
Iron(II) sulfate
Iron(II) sulfate
Systematic name Iron(II) sulfate
Other names ferrous sulfate
green vitriol
iron vitriol
Molecular formula FeSO4·H2O
Molar mass 151.908 g/mol (anhydrous)
169.923 g/mol (monohydrate)
224.120 g/mol (tetrahydrate)
242.135 g/mol (pentahydrate)
278.05 g/mol (heptahydrate)
CAS number [7720-78-7] (heptahydrate)
Appearance blue/green or white crystals
Crystal structure monoclinic
Density 1.898 g/cm3
Solubility (water) Soluble
Melting point 64°C
Boiling point 90°C (becomes FeSO4·H2O)
Disclaimer and references

Iron(II) sulfate is the chemical compound with the formula (FeSO4). Also known as ferrous sulphate, or copperas, iron(II) sulfate is most commonly encountered as the blue-green heptahydrate. Image File history File links Metadata Size of this preview: 799 × 599 pixelsFull resolution (2005 × 1504 pixel, file size: 1. ... IUPAC nomenclature is a systematic way of naming organic chemical compounds. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... This article does not cite any references or sources. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences and alloys. ... Enargite crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... In physics, density is mass m per unit volume V. For the common case of a homogeneous substance, it is expressed as: where, in SI units: ρ (rho) is the density of the substance, measured in kg·m-3 m is the mass of the substance, measured in kg V is... Solubility refers to the ability for a given substance, the solute, to dissolve in a solvent. ... This article describes water from a scientific and technical perspective. ... The melting point of a crystalline solid is the temperature at which it changes state from solid to liquid. ... Italic text This article is about the boiling point of liquids. ... A chemical compound is a chemical substance of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. ... General Name, symbol, number iron, Fe, 26 Chemical series transition metals Group, period, block 8, 4, d Appearance lustrous metallic with a grayish tinge Standard atomic weight 55. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16, 3, p Appearance lemon yellow Standard atomic weight 32. ... General Name, Symbol, Number oxygen, O, 8 Chemical series nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless (gas) very pale blue (liquid) Standard atomic weight 15. ...



Iron(II) sulphate can be found in various states of hydration, and several of these forms exist in nature. Hydrate is a term which means different things in inorganic chemistry and organic chemistry. ...

  • FeSO4·H2O (mineral: szomolnokite)
  • FeSO4·4H2O
  • FeSO4·5H2O (mineral: siderotil)
  • FeSO4·7H2O (mineral: melanterite)

At 90°C, the heptahydrate loses water to form the colourless monohydrate, also called green vitriol or copperas. It has been suggested that this article or section be merged into sulfuric acid. ...


In the finishing of steel prior to plating or coating, the steel sheet or rod is passed through pickling baths of sulfuric acid. This treatment produces large quantities of iron(II) sulfate as a waste product. Iron(II) sulfate is prepared commercially by oxidation of pyrite, or by treating iron with sulfuric acid. For other uses, see Steel (disambiguation). ... General Name, symbol, number iron, Fe, 26 Chemical series transition metals Group, period, block 8, 4, d Appearance lustrous metallic with a grayish tinge Standard atomic weight 55. ... Sulfuric (or sulphuric) acid, H2SO4, is a strong mineral acid. ...



Ferrous sulfate is used to treat iron-deficiency anemia. Side effects of therapy may include nausea and epigastric abdominal discomfort after taking iron. These side effects may be minimized by taking ferrous sulfate at bedtime. For a more specific and detailed discussion of anemia caused by iron deficiency, see the Wikipedia article iron deficiency anemia. ... For other uses, see Nausea (disambiguation). ... literally, an adjective which means of, relating to or characterised by the epigastrium. An abdominal pain or an abdominal viscus might be described as epigastric. The superior and inferior epigastric arteries are considered an important feature of the anterior abdominal wall. ...

Ferrous sulfate is also also used to fortify various foods with iron, for example, the enriched corn meal in Cheetos[1]. Cornmeal is dried, ground maize corn. ... Crunchy Cheetos Cheetos are a crunchy, cheese-flavored snack made from extruded cornmeal. ...


Ferrous sulfate is used in the manufacture of inks, most notably iron gall ink, which was used from the middle ages until the American Revolution. It also finds use in wool dyeing as a mordant, and in water purification as a substitute for aluminium sulfate. An ink is a liquid containing various pigments and/or dyes used for coloring a surface to render an image or text. ... Oak galls and iron(II) sulfate, ingredients of iron gall ink Iron gall ink (sometimes iron gall nut ink) is a purple-black ink made from iron salts and tannin from vegetable sources. ... The Middle Ages formed the middle period in a traditional schematic division of European history into three ages: the classical civilization of Antiquity, the Middle Ages, and modern times, beginning with the Renaissance. ... Long and short hair wool at the South Central Family Farm Research Center in Boonesville, Arizona Wool is the fiber derived from the fur of animals and people of the Caprinae family, principally sheep, but the hair of certain species of other mammals such as goats and rabbits and oxes... Look up dye in Wiktionary, the free dictionary. ... Look up Mordant in Wiktionary, the free dictionary. ... Control room and schematics of the water purification plant to Bret lake. ... Aluminium sulfate is a widely used industrial chemical. ...

Two different methods for the direct application of indigo dye were developed in England in the eighteenth century and remained in use well into the nineteenth century. One of these, known as china blue, involved iron(II) sulfate. After printing an insoluble form of indigo onto the fabric, the indigo was reduced to leuco-indigo in a sequence of baths of ferrous sulfate (with reoxidation to indigo in air between immersions). The china blue process could make sharp designs, but it could not produce the dark hues of other methods. Indigo dye indigo molecule Indigo dye is an important dyestuff with a distinctive blue color (see indigo). ...

Ferrous sulfate can also be used to stain concrete a yellowish rust color.[2]

Woodworkers use ferrous sulfate solutions to color maple wood a silvery hue.

Other uses

In horticulture it is used as a lawn conditioner and moss killer. Horticulture (Latin: hortus (garden plant) + cultura (culture)) is classically defined as the culture or growing of garden plants. ... A lawn is an area of recreational or amenity land planted with grass, and sometimes clover and other plants, which are maintained at a low, even height. ...

In the second half of the 19th century, Ferrous Sulfate was also used as a photographic developer for Collodion process images. The collodion process is an early photographic process which gave way in the late 19th century to todays gelatin emulsion process. ...

Ferrous sulphate is sometimes added to the cooling water flowing through the brass tubes of a turbine condenser. It forms an erosion-resistant, protective coating on the inside of the tube.

See also

  • Iron(III) sulfate, the other common simple sulfate of iron.
  • Ammonium iron(II) sulfate, a common double salt of ammonium sulfate with iron(II) sulfate.

Mohrs Salt, ammonium iron sulfate, is a double salt of iron sulfate and ammonium sulfate, with the formula [NH4]2[Fe][SO4]2·6H2O or Fe[SO4].[NH4]2[SO4].6H2O Mohrs salt is preferred over iron(II) sulfate for titration purposes as it is much less affected... Ammonium sulphate, [NH4]2[SO4] contains 21% nitrogen as ammonia and 24% sulfur as sulfate. ...


  1. ^ Product Information - Smart Spot. PepsiCo. (December 06, 2006).
  2. ^ How To Stain Concrete with Iron Sulfate

External links

  • Product Information. Chemical Land21 (January 10th, 2007).

  Results from FactBites:
Iron(II) sulfate - Wikipedia, the free encyclopedia (295 words)
Iron(II) sulfate has a blue-green color, monoclinic crystal structure, and is water-soluble.
Iron(II) sulfate is prepared commercially by oxidation of pyrite or by treating iron with sulfuric acid.
In horticulture it is used as a lawn conditioner and moss killer, traditionally referred to as sulphate of iron.
  More results at FactBites »



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