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Copper Sulphate
Copper Sulphate

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Copper(II) sulfate, also known as cupric sulfate, is the chemical compound with the chemical 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),



Copper Sulphate
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Professional ServiceCopper(II) sulfateIdentifiersPropertiesStructureThermochemistryHazardsRelated compounds
Preferred IUPAC name[hide]Copper(II) sulfate[citation needed]
Systematic name[hide]Copper(2+) sulfate[1] (additive)
Other names[hide]Cupric sulfate[citation needed]
CAS number7758-98-7 Y
ChemSpider24834757 N
EC number231-847-6
UN number3077
KEGGC18713 Y
RTECS numberGL8800000
Gmelin Reference8294
Jmol-3D imagesImage 1
Image 2
Image 3
Image 4
[show]O=S1(=O)O[Cu]O1 o:s1(:o)O[Cu]O1 [Cu++].[O-][S++]([O-])([O-])[O-] [O--].[O--].[Cu++].[O-][S+4][O-]
[show]InChI=1S/Cu.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2 Y
Key: ARUVKPQLZAKDPS-UHFFFAOYSA-L Y InChI=1/Cu.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
Molecular formulaCuSO4
Molar mass159.609 g mol-1
Exact mass158.881330257 g mol-1
AppearanceLight, pale green, opaque crystals
Density3.603 g cm-3
Melting point

650 °C, 923 K, 1202 °F (decomposes)

Solubility in waterHydrates
Crystal structureOrthorhombic[2]
Space groupPnma, oP24
Lattice constanta = 839 pm, b = 669 pm, c = 483 pm
Std enthalpy of
formation ΔfHo298
−772.6--770.2 kJ mol-1
Standard molar
entropy So298
108.8-109.6 J K-1 mol-1
GHS pictograms
GHS signal wordWARNING
GHS hazard statementsH302, H315, H319, H410
GHS precautionary statementsP273, P305+351+338, P501
EU Index029-004-00-0
EU classificationXn N
R-phrasesR22, R36/38, R50/53
S-phrases(S2), S22, S60, S61
NFPA 704021
LD5087 mg kg-1 (oral, mouse)

300 mg kg-1 (oral, rat)
470 mg kg-1 (oral, mammal)

Other cationsNickel(II) sulfate
Zinc sulfate
Infobox references


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