Cobalt(II) sulfate

Cobalt(II) sulfate
Cobalt(II) sulfate
CAS number 10124-43-3 YesY
13455-64-0 (monohydrate)
10026-24-1 (heptahydrate)
PubChem 24965
ChemSpider 23338 YesY
UNII H7965X29HX YesY
EC number 233-334-2
ChEBI CHEBI:53470 YesY
RTECS number GG3100000 (anhydrous)
GG3200000 (heptahydrate)
Jmol-3D images Image 1
Molecular formula 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)

Solubility in water 36.2 g/100 ml (20°C)
EU Index 027-005-00-0
EU classification Carc. Cat. 2
Muta. Cat. 3
Repr. Cat. 2
Toxic (T)
Dangerous for the environment (N)
R-phrases R49, R60, R22, R42/43, R68, R50/53
NFPA 704
NFPA 704.svg
Flash point Non-flammable
LD50 424 mg/kg
 YesY sulfate (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

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.



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]


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.


  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–67; 1363. ISBN 0-8493-0594-2 
  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. doi:10.1093/toxsci/49.1.56. PMID 10367342. 
  6. ^ Cobalt sulfate heptahydrate: Carcinogenic Potency Database

Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • cobalt(II) sulfate — kobalto(II) sulfatas statusas T sritis chemija formulė CoSO₄ atitikmenys: angl. cobalt(II) sulfate; cobaltous sulfate rus. кобальт сернокислый; кобальта(II) сульфат ryšiai: sinonimas – kobalto tetraoksosulfatas …   Chemijos terminų aiškinamasis žodynas

  • cobalt(III) sulfate — kobalto(III) sulfatas statusas T sritis chemija formulė Co₂(SO₄)₃ atitikmenys: angl. cobaltic sulfate; cobalt(III) sulfate rus. кобальт сернокислый окисный; кобальта(III) сульфат ryšiai: sinonimas – dikobalto tris(tetraoksosulfatas) …   Chemijos terminų aiškinamasis žodynas

  • cobalt-II sulfate — noun A salt of divalent cobalt and the sulfate radical, CoSO. Syn: red vitriol …   Wiktionary

  • Cobalt(II) thiocyanate — Identifiers CAS number …   Wikipedia

  • Cobalt(II) nitrate — Other names Cobaltous nitrate Nitric acid, cobalt(2+) salt …   Wikipedia

  • Cobalt(II) chlorate — Identifiers ChemSpider 14688171  …   Wikipedia

  • COBALT — Le cobalt (symbole Co, numéro atomique 27) est un métal placé sur la première ligne de la colonne VIII a, entre le fer et le nickel; il existe des analogies nombreuses entre cet élément, le rhodium et l’iridium. Le cobalt naturel, de masse… …   Encyclopédie Universelle

  • Cobalt extraction techniques — Cobalt ore Several methods exist for the separation of cobalt from copper and nickel. They depend on the concentration of cobalt and the exact composition of the used ore. Contents …   Wikipedia

  • sulfate mineral — sulfate also spelled  Sulphate,          Sulfate minerals Sulfate mineralsany naturally occurring salt of sulfuric acid. About 200 distinct kinds of sulfates are recorded in mineralogical literature, but most of them are of rare and local… …   Universalium

  • Cobalt sulfide — Identifiers CAS number 1317 42 6 …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”