Cadmium sulfate octahydrate

Chemical properties

White crystal or crystalline powder

Chemical properties

Cadmium sulfate is a white to colorless, odorless, crystalline substance.

The Uses of Cadmium sulfate octahydrate

Cadmium sulfate octahydrate is used in preparation of cadmium standards.

The Uses of Cadmium sulfate octahydrate

In electrodeposition of Cd, Cu, and Ni; in phosphors, manufacture of standard cadmium elements; Cadmium sulfate octahydrate can be used as catalyst in the Marsh test for As, determining H2S and detecting fumaric acid; as nematocide, fungicide, bactericide; lubricant; electrolyte in Weston cell.

The Uses of Cadmium sulfate octahydrate

Cadmium sulfate mainly used in electroplating of cadmium, which is used in electronic circuits. It is used as a precursor for cadmium based pigments such as cadmium sulfide and pharmaceutical intermediates. It is used in the standard weston cell.

Definition

ChEBI: A hydrate composed of cadmium sulfate and water in a 3:8 ratio.

Safety Profile

Confirmed human carcinogen with experimental tumorigenic and neoplastigenic data. Experimental teratogenic and reproductive effects. Mutation data reported. When heated to decomposition it emits very toxic fumes of Cd and SO,. See also CADMIUM SULFATE, CADMIUM COMPOUNDS, and SULFATES.

Potential Exposure

It is used in pigments, electroplating; as a fungicide; and in synthetic and analytical chemistry. Also used in fluorescent screens; as an electrolyte. Incompatibilities: Acts as a weak inorganic acid; neutralizes bases. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, sulfur, selenium, tellurium, zinc

Shipping

UN2570 Cadmium compounds, Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.

Purification Methods

The sulfate crystallises from distilled water as a hydrate by partial evaporation in a desiccator. It gives the monohydrate on heating at 80o. It is insoluble in EtOH, Me2CO or EtOAc. It forms a white precipitate of Cd(OH)2 with aqueous NH3 which dissolves in excess of NH3 to form soluble [Cd(NH3)4]SO4. [Gmelin’s Cadmium (8th edn) 33 p 121 1925, Suppl pp 609-610 1959.]