Description
Copper sulfate pentahydrate appears as blue crystalline granules or powder. Melting point 110°C (with decomposition). Non-combustible. Nauseating metallic taste. Odorless. White when dehydrated. (NTP, 1992);BLUE SOLID IN VARIOUS FORMS.
IUPAC Name
copper sulfate pentahydrate
Molecular Weight
294.68
Molecular Formula
CuSO4
Canonical SMILES
[Cu+2].[O-]S([O-])(=O)=O.O
InChI
InChI=1S/Cu.H₂O4S.5H₂O/c;1-5(2,3)4;;;;;/h;(H2,1,2,3,4);5*1H2/q+2;;;;;;/p-2
InChI Key
JZCCFEFSEZPSOG-UHFFFAOYSA-L
Boiling Point
1207 °F at 760 mm Hg (decomposes) (NTP, 1992);DECOMP ABOVE 150 °C WITH -5H₂O
Melting Point
297 °F (dehydrates) (NTP, 1992);Decomp above 110 °C
Density
2.284 (NTP, 1992);2.286 @ 15.6 °C/4 °C;2.3 g/cm³
Solubility
greater than or equal to 100 mg/mL at 70° F (NTP, 1992);31.6 g/100 cc water @ 0 °C, 203.3 g/100 cc @ 100 °C;1 g in about 500 ml alcohol;In water: 148 g/kg @ 0 °C; 230.5 gkg @ 25 °C; 335 g/kg @ 50 °C; 736 g/kg @ 100 °C;Practically insol in most organic solvents.;1 g in 3 ml glycerine;15.6 g/100 cc methanol @ 18 °C;Soluble in methanol (15.6 g/100 ml solution) but insoluble in ethanol; it readily forms soluble alkaline complexes at sufficiently high concentrations of amines or alkali cyanides.;In water, 3.2X10+4 mg/l @ 20 °C;Solubility in water, g/100ml at 0 °C: 31.7
Color Form
Large, blue or ultramarine, triclinic crystals or blue granules or light-blue powder
Complexity
62.2
Corrosivity
Very corrosive to plain steel.
Covalently-Bonded Unit Count
7
Decomposition
DECOMP ABOVE 150 °C (BOILING POINT) WITH -5H₂O /SPR: TO ANHYDROUS SALT/;DECOMP ABOVE 110 °C (MELTING POINT) WITH -4H₂O /SRP: TO MONOHYDRATE SALT/;When heated to decomposition it emits toxic fumes of /sulfur oxides/.;110 °C
EC Number
231-847-6
Exact Mass
248.934
Formal Charge
0
H-Bond Acceptor
9
H-Bond Donor
5
Heavy Atom Count
11
ICSC Number
1416
MDL Number
MFCD00149681
MeSH Entry Terms
Blue Vitriol;Copper Sulfate;Cupric Sulfate;Sulfate, Copper;Sulfate, Cupric;Vitriol, Blue
Monoisotopic Mass
248.934
Odor
Odorless
Other Experimental
Loses 2H₂O @ 30 °C, 2 more H₂O @ 110 °C; becomes anhydrous by 250 °C; efflorescent in air.;LOSING WATER BY CRYSTALLIZATION @ 110 °C TO FORM WHITE MONOHYDRATE, CUSO4.H₂O;Dielectric constant: 6.60 @ room temperature;SOLN ARE STRONGLY CORROSIVE TO IRON & GALVANIZED IRON. /Cupric sulfate soln/;Slowly effloresces in dry air or above 30.6 °C with the formation of the trihydrate; at 88-100 °C the trihydrate is produced more quickly; above 114 °C the monohydrate is formed, and between about 245 and 240 °C, the anhydrous product copper(II) sulfate results.
Physical State
Blue Liquid
Refractive Index
INDICES OF REFRACTION: 1.514, 1.537, 1.543
Rotatable Bond Count
0
RTECS Number
GL8900000
Stability
INDEFINITE WHEN KEPT DRY; STABLE TO HEAT, COLD, & LIGHT.
UNII
LRX7AJ16DT
UN Number
3288
