Cobalt(II) sulfate

Cobalt(II) sulfate
Names
IUPAC name
Cobalt(II) sulfate
Identifiers
10124-43-3 YesY
13455-64-0 (monohydrate) N
10026-24-1 (heptahydrate) N
ChEBI CHEBI:53470 YesY
ChemSpider 23338 YesY
EC Number 233-334-2
Jmol interactive 3D Image
PubChem 24965
RTECS number GG3100000 (anhydrous)
GG3200000 (heptahydrate)
UNII H7965X29HX YesY
Properties
CoSO4
Molar mass 154.996 g/mol (anhydrous)
173.01 g/mol (monohydrate)
263.08 g/mol (hexahydrate)
281.103 g/mol (heptahydrate)
Appearance reddish crystalline (anhydrous, monohydrate)
pink salt (heptahydrate)
Odor odorless (heptahydrate)
Density 3.71 g/cm3 (anhydrous)
3.075 g/cm3 (monohydrate)
2.019 g/cm3 (hexahydrate)
1.948 g/cm3 (heptahydrate)
Melting point 735 °C (1,355 °F; 1,008 K) (anhydrous)
96.8 °C (heptahydrate)
Boiling point 420 °C (788 °F; 693 K) (heptahydrate)
anhydrous:
36.2 g/100 mL (20 °C)
38.3 g/100 mL (25 °C)
84 g/100 mL (100 °C)
heptahydrate:
60.4 g/100 mL (3 °C)
67 g/100 mL (70 °C)
Solubility anhydrous:
1.04 g/100 mL (methanol, 18 °C)
insoluble in ammonia
heptahydrate:
54.5 g/100 mL (methanol, 18 °C)
1.639 (monohydrate)
1.540 (hexahydrate)
1.483 (heptahydrate)
Structure
orthorhombic (anhydrous)
monoclinic (monohydrate, heptahydrate)
Hazards
Safety data sheet JT Baker MSDS
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
S-phrases S53, S45, S60, S61
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
0
2
0
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
424 mg/kg (oral, rat)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Cobalt(II) sulfate is an 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.[1][2]

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. For these purposes, the cobalt sulfate is produced by treating cobalt oxide with sulfuric acid.[1]

Health issues

Cobalt is essential for most higher forms of life, but more than a few milligrams each day is harmful. Rarely have poisonings resulted from cobalt compounds.[3] Upon inhalation of salts, there is some evidence for carcinogenicity.[1]

References

  1. 1 2 3 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
  2. ↑ 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).
  3. ↑ 11.1.5 The unusual type of myocardiopathy recognized in 1965 and 1966 in Quebec (Canada), Minneapolis (Minnesota), Leuven (Belgium), and Omaha (Nebraska) was associated with episodes of acute heart failure (e/g/, 50 deaths among 112 beer drinkers).
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