Copper(II) sulfate

Copper(II) sulfate

Crystals of CuSO4·5H2O

  Copper, Cu
  Sulfur, S
  Oxygen, O
  Hydrogen, H

Portion of the structure of the pentahydrate
(sulfate links Cu(H2O)2+4 centers)

Unit cell of the crystal structure of CuSO4·5H2O
with hydrogen bonds in black[1]
Names
IUPAC name
Copper(II) sulfate
Other names
  • Cupric sulphate
  • Blue vitriol (pentahydrate)
  • Bluestone (pentahydrate)
  • Bonattite (trihydrate mineral)
  • Boothite (heptahydrate mineral)
  • Chalcanthite (pentahydrate mineral)
  • Chalcocyanite (mineral)
Copper Sulphate pentahydrate
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.028.952 Edit this at Wikidata
EC Number
  • 231-847-6
8294
KEGG
RTECS number
  • GL8800000 (anhydrous)
    GL8900000 (pentahydrate)
UNII
  • InChI=1S/Cu.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2 checkY
    Key: ARUVKPQLZAKDPS-UHFFFAOYSA-L checkY
  • InChI=1/Cu.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
    Key: ARUVKPQLZAKDPS-NUQVWONBAI
  • [O-]S(=O)(=O)[O-].[Cu+2]
Properties
CuSO4 (anhydrous)
CuSO4·5H2O (pentahydrate)
Molar mass 159.60 g/mol (anhydrous)[2]
249.685 g/mol (pentahydrate)[2]
Appearance gray-white (anhydrous)
blue (pentahydrate)
Density 3.60 g/cm3 (anhydrous)[2]
2.286 g/cm3 (pentahydrate)[2]
Melting point 110 °C (230 °F; 383 K) decomposes

560 °C decomposes[2](pentahydrate)

Fully decomposes at 590 °C (anhydrous)

Boiling point decomposes to cupric oxide at 650 °C
pentahydrate
316 g/L (0 °C)
2033 g/L (100 °C)
anhydrous
168 g/L (10 °C)
201 g/L (20 °C)
404 g/L (60 °C)
770 g/L (100 °C)[3]
Solubility anhydrous
insoluble in ethanol[2]
pentahydrate
soluble in methanol[2]
10.4 g/L (18 °C)
insoluble in ethanol and acetone
1330·10−6 cm3/mol
1.724–1.739 (anhydrous)[4]
1.514–1.544 (pentahydrate)[5]
Structure
Orthorhombic (anhydrous, chalcocyanite), space group Pnma, oP24, a = 0.839 nm, b = 0.669 nm, c = 0.483 nm.[6]
Triclinic (pentahydrate), space group P1, aP22, a = 0.5986 nm, b = 0.6141 nm, c = 1.0736 nm, α = 77.333°, β = 82.267°, γ = 72.567°[7]
Thermochemistry
5 J/(K·mol)
−769.98 kJ/mol
Pharmacology
V03AB20 (WHO)
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
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 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
2
0
1
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
300 mg/kg (oral, rat)[9]

87 mg/kg (oral, mouse)

NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1 mg/m3 (as Cu)[8]
REL (Recommended)
 TWA 1 mg/m3 (as Cu)[8]
IDLH (Immediate danger)
 TWA 100 mg/m3 (as Cu)[8]
Safety data sheet (SDS) anhydrous
pentahydrate
Related compounds
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Copper(II) sulfate is an inorganic compound with the chemical formula CuSO4. It forms hydrates CuSO4·nH2O, where n can range from 1 to 7. The pentahydrate (n = 5), a bright blue crystal, is the most commonly encountered hydrate of copper(II) sulfate,[10] while its anhydrous form is white.[11] Older names for the pentahydrate include blue vitriol, bluestone,[12] vitriol of copper,[13] and Roman vitriol.[14] It exothermically dissolves in water to give the aquo complex [Cu(H2O)6]2+, which has octahedral molecular geometry. The structure of the solid pentahydrate reveals a polymeric structure wherein copper is again octahedral but bound to four water ligands. The Cu(II)(H2O)4 centers are interconnected by sulfate anions to form chains.[15]

  1. ^ Varghese, J. N.; Maslen, E. N. (1985). "Electron density in non-ideal metal complexes. I. Copper sulphate pentahydrate". Acta Crystallographica Section B. 41 (3): 184–190. doi:10.1107/S0108768185001914.
  2. ^ a b c d e f g Haynes, p. 4.62
  3. ^ Rumble, John, ed. (2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press, Taylor & Francis Group. pp. 5–179. ISBN 9781138561632.
  4. ^ Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C., eds. (2003). "Chalcocyanite" (PDF). Handbook of Mineralogy. Vol. V. Borates, Carbonates, Sulfates. Chantilly, VA, US: Mineralogical Society of America. ISBN 978-0962209741.
  5. ^ Haynes, p. 10.240
  6. ^ Kokkoros, P. A.; Rentzeperis, P. J. (1958). "The crystal structure of the anhydrous sulphates of copper and zinc". Acta Crystallographica. 11 (5): 361–364. doi:10.1107/S0365110X58000955.
  7. ^ Bacon, G. E.; Titterton, D. H. (1975). "Neutron-diffraction studies of CuSO4 · 5H2O and CuSO4 · 5D2O". Z. Kristallogr. 141 (5–6): 330–341. Bibcode:1975ZK....141..330B. doi:10.1524/zkri.1975.141.5-6.330.
  8. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
  9. ^ Cupric sulfate. US National Institutes of Health
  10. ^ Connor, Nick (2023-07-24). "Copper (II) Sulfate | Formula, Properties & Application". Material Properties. Retrieved 2024-02-03.
  11. ^ Foundation, In association with Nuffield. "A reversible reaction of hydrated copper(II) sulfate". RSC Education. Retrieved 2024-02-03.
  12. ^ "Copper (II) sulfate MSDS". Oxford University. Archived from the original on 2007-10-11. Retrieved 2007-12-31.
  13. ^ Antoine-François de Fourcroy, tr. by Robert Heron (1796) "Elements of Chemistry, and Natural History: To which is Prefixed the Philosophy of Chemistry". J. Murray and others, Edinburgh. Page 348.
  14. ^ Oxford University Press, "Roman vitriol", Oxford Living Dictionaries. Accessed on 2016-11-13
  15. ^ Ting, V. P.; Henry, P. F.; Schmidtmann, M.; Wilson, C. C.; Weller, M. T. (2009). "In situ neutron powder diffraction and structure determination in controlled humidities". Chem. Commun. 2009 (48): 7527–7529. doi:10.1039/B918702B. PMID 20024268.