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Copper(II) sulfate
IUPAC name[hide]
Copper(II) sulfate
Other names[hide]
Cupric sulfate
Cupper(II)sulphate
Blue vitriol
Bluestone
Chalcanthite
Identifiers
CAS number 7758-98-7 YesY,
7758-99-8 (pentahydrate)
PubChem 24462
ChemSpider 22870 YesY
UNII KUW2Q3U1VV YesY
EC number 231-847-6
RTECS number GL8800000 (anhydrous)
GL8900000 (pentahydrate)
SMILES
[show]
[O-]S(=O)(=O)[O-].[Cu+2]
InChI
[show]
InChI=1/Cu.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
InChI key
[show]
ARUVKPQLZAKDPS-NUQVWONBAI
Properties
Molecular formula CuSO4
Molar mass 159.62 g/mol (anhydrous)
249.70 g/mol (pentahydrate)
Appearance blue crystalline solid (pentahydrate)
gray-white powder (anhydrous)
Density 3.603 g/cm3 (anhydrous)
2.284 g/cm3 (pentahydrate)
Melting point
110 °C (−4H2O)
150 °C (423 K) (−5H2O)
< 650 °C decomp.
Solubility in water pentahydrate
316 g/L (0 °C)
2033 g/L (100 °C) form unspecified
320 g/L (20°C)
618 g/L (60°C)
1140 g/L (100 °C)
Solubility anhydrous
insoluble in ethanol pentahydrate
soluble in methanol
10.4 g/L (18 °C)
insoluble in ethanol
Refractive index (nD) 1.514 (pentahydrate)
Structure
Crystal structure Triclinic
Coordination
geometry Octahedral
Thermochemistry
Standard molar
entropy So298 109.05 J K−1 mol−1
Hazards
MSDS anhydrous
pentahydrate
EU Index 029-004-00-0 begin_of_the_skype_highlighting 029-004-00-0 end_of_the_skype_highlighting
EU classification Harmful (Xn)
Irritant (Xi)
Dangerous for the environment (N)
R-phrases R22, R36/38, R50/53
S-phrases (S2), S22, S60, S61
NFPA 704
NFPA 704.svg
0
2
1
Flash point Non-inflammable
LD50 300 mg/kg (oral, rat)
87 mg/kg (oral, mouse)
470 mg/kg (oral, mammal)
Related compounds
Other cations Nickel(II) sulfate
Zinc sulfate
YesY (what is this?) (verify)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references
Copper(II) sulfate is the chemical compound with the formula CuSO4. This salt exists as a series of compounds that differ in their degree of hydration. The anhydrous form is a pale green or gray-white powder, whereas the pentahydrate (CuSO4·5H2O), the most commonly encountered salt, is bright blue. The anhydrous form occurs as a rare mineral known as chalcocyanite. The hydrated copper sulfate occurs in nature as chalcanthite (pentahydrate), and two more rare ones: bonattite (trihydrate) and boothite (heptahydrate). Archaic names for copper(II) sulfate are "blue vitriol" and "bluestone".[1]