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Cobalt(II) sulfate

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Cobalt(II) sulfate
Cobalt(II) sulfate
Names
IUPAC name
Cobalt(II) sulfate
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.030.291 Edit this at Wikidata
EC Number
  • 233-334-2
RTECS number
  • GG3100000 (anhydrous)
    GG3200000 (heptahydrate)
UNII
  • InChI=1S/Co.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2 checkY
    Key: KTVIXTQDYHMGHF-UHFFFAOYSA-L checkY
  • InChI=1/Co.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
    Key: KTVIXTQDYHMGHF-NUQVWONBAJ
  • [Co+2].[O-]S([O-])(=O)=O
Properties
CoSO4
Molar mass 154.996 g/mol (anhydrous)
173.01 g/mol (monohydrate)
281.103 g/mol (heptahydrate)
Appearance reddish crystalline (anhydrous, monohydrate)
pink salt (heptahydrate)
Density 3.71 g/cm3 (anhydrous)
3.08 g/cm3 (monohydrate)
2.03 g/cm3 (heptahydrate) [1]
Melting point 735 °C (anhydrous)
74 °C (heptahydrate)
36.2 g/100 ml (20 °C)
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
424 mg/kg
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Cobalt(II) sulfate is the inorganic compound with the formula CoSO4. It is the divalent cobalt salt of sulfuric acid. The most common form of cobalt sulfate are the hydrates CoSO4.7H2O and CoSO4.H2O. Cobalt(II) sulfate and its hydrates are some of the most commonly available salts of cobalt.

Properties

Cobalt(II) sulfate appears as red monoclinic crystals that melt around 100 °C and become anhydrous at 250 °C. It is soluble in water, slightly soluble in ethanol, and especially soluble in methanol. It forms by the reaction of metallic cobalt, its oxide, hydroxide, or carbonate with sulfuric acid. Cobalt is obtained from ores via the sulfate in some cases.[2][3]

Uses

Cobalt(II) sulfate is used in the preparation of pigments, as well as in the manufacture of other cobalt salts. Cobalt pigment is used in porcelains and glass. Cobalt(II) sulfate is used in storage batteries and electroplating baths, sympathetic inks, and as an additive to soils and animal feeds.[2][4]

Health issues

Cobalt(II) sulfate has been shown to be toxic and slightly carcinogenic upon inhalation in mice.[5] It has also been shown to be a mutagen in salmonella.[6]

It was added to the list of substances of very high concern in the European Union on 15 December 2010.

References

  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–67, 1363. ISBN 0-8493-0594-2Template:Inconsistent citations{{cite book}}: CS1 maint: postscript (link)
  2. ^ a b John D. Donaldson, Detmar Beyersmann "Cobalt and Cobalt Compounds" in Ullmann's Encyclopedia of Industrial Chemistry 2005, Wiley-VCH, Weinheim. doi:10.1002/14356007.a07_281.pub2
  3. ^ Rarely, cobalt(II) sulfate is found in form of few crystallohydrate minerals, occurring among oxidation zones containing primary Co minerals (like skutterudite or cobaltite). These minerals are: biebierite (heptahydrate), moorhouseite (Co,Ni,Mn)SO4.6H2O, aplowite (Co,Mn,Ni)SO4.4H2O and cobaltkieserite (monohydrate).
  4. ^ Cobalt Sulfate
  5. ^ JR Bucher, JR Hailey, JR Roycroft, JK Haseman, RC Sills, SL Grumbein, PW Mellick and BJ Chou (1999). "Inhalation toxicity and carcinogenicity studies of cobalt sulfate". Toxicological Sciences. 49 (1): 56–67. doi:10.1093/toxsci/49.1.56. PMID 10367342.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  6. ^ Cobalt sulfate heptahydrate: Carcinogenic Potency Database
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