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Cadmium sulfate
IUPAC name Cadmium(II) sulfate
Other names Sulfuric acid, cadmium salt (1:1),
Identifiers
CAS number 10124-36-4
PubChem 24962
EC number 233-331-6
ChEBI CHEBI:50292
RTECS number EV2700000
SMILES [Cd+2].[O-]S([O-])(=O)=O
Gmelin Reference 8295
Properties
Molecular formula CdSO4
CdSO4·H2O (monohydrate)
3CdSO4·8H2O (octahydrate)
Molar mass 208.47 g/mol (anhydrous)
226.490 g/mol (monohydrate)
769.546 g/mol (octahydrate)
Appearance White hygroscopic solid
Odor odorless
Density 4.691 g/cm3 (anhydrous)
3.79 g/cm3 (monohydrate)
3.08 g/cm3 (octahydrate)
Melting point

1000 °C, 1273 K, 1832 °F

Boiling point

(decomposes to basic sulfate and then oxide)

Solubility in water anhydrous:
75 g/100 mL (0 °C)
76.4 g/100 mL (25 °C)
58.4 g/100 mL (99 °C)
monohydrate:
76.7 g/100 mL (25 °C)
octahydrate:
very soluble
Solubility slightly soluble in methanol, ethyl acetate
insoluble in ethanol
-59.2·10−6 cm3/mol
Refractive index (nD) 1.565
Structure
Crystal structure orthorhombic (anhydrous)
monoclinic (hepta & octahydrate)
Thermochemistry
Std enthalpy of
formation ΔfHo298
−935 kJ·mol−1
Standard molar
entropy So298
123 J·mol−1·K−1
Hazards
NFPA 704

NFPA 704.svg

1
3
0
 
U.S. Permissible
exposure limit (PEL)
[1910.1027] TWA 0.005 mg/m3 (as Cd)
Related compounds
Other anions Cadmium acetate,
Cadmium chloride,
Cadmium nitrate
Other cations Zinc sulfate,
Calcium sulfate,
Magnesium sulfate
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Cadmium sulfate is a chemical compound. Its chemical formula is CdSO4. It is made of cadmium and sulfate ions. The cadmium is in its +2 oxidation state.

Properties

Cadmium sulfate is a white solid. It easily dissolves in water. It is toxic and carcinogenic.

Preparation

Cadmium sulfate is made by dissolving cadmium carbonate, cadmium oxide, or cadmium metal in sulfuric acid.

Uses

Cadmium sulfate is used to electroplate cadmium on electronic circuits. It is also used to make cadmium sulfide, a pigment. It is used as an electrolyte in a certain battery used to make voltmeters accurate.

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