7790-84-3

Basic information

• Product Name: Cadmium sulfate octahydrate
• Synonyms: Cadmiumsulfate(1:1)hydrate(3:8);cadmiumsulphateoctahydrate;Sulfuricacid,cadmiumsalt,hydrate;CADMIUM SULFATE, 8/3-HYDRATE;CADMIUM SULFATE HYDRATE;CADMIUM SULFATE N-HYDRATE;CADMIUM SULFATE-WATER(3/8);CADMIUM SULPHATE 8/3-HYDRATE
• CAS NO: 7790-84-3
• Molecular Formula: 3Cd.3O4S.8H2O
• Molecular Weight: 769.53
• EINECS: 233-662-6
• Product Categories: CadmiumAnalytical Reagents;Catalysis and Inorganic Chemistry;Chemical Synthesis;Puriss;Analytical Reagents for General Use;C-D, Puriss p.a. ACS;Puriss p.a. ACS
• Mol File: 7790-84-3.mol
• Article Data: 0

Chemical Properties

• Melting Point: 41 °C
• Boiling Point: >80°C(decomposition)
• Appearance: White/Solid
• Density: 3.08
• Refractive Index: 1.565
• Storage Temp.: Storage temperature: no restrictions.
• Solubility: 1130g/l
• Water Solubility: Highly soluble in water. Partially soluble in methanol and ethyl acetate. Insoluble in ethanol.
• Stability: Stable.
• Merck: 14,1627
• CAS DataBase Reference: Cadmium sulfate octahydrate(CAS DataBase Reference)
• NIST Chemistry Reference: Cadmium sulfate octahydrate(7790-84-3)
• EPA Substance Registry System: Cadmium sulfate octahydrate(7790-84-3)

Safety Data

• Hazard Codes: T+,N
• Statements: 45-46-60-61-25-26-48/23/25-50/53
• Safety Statements: 53-45-60-61
• RIDADR: UN 2570 6.1/PG 3
• WGK Germany: 3
• RTECS: EV2850000
• TSCA: Yes
• HazardClass: 6.1
• PackingGroup: III
• Hazardous Substances Data: 7790-84-3(Hazardous Substances Data)

Usage

Uses

Different sources of media describe the Uses of 7790-84-3 differently. You can refer to the following data:
1. 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.
2. Cadmium sulfate octahydrate is used in preparation of cadmium standards.
3. 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.

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.

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.]

InChI:InChI=1/3Cd.3H2O4S.8H2O/c;;;3*1-5(2,3)4;;;;;;;;/h;;;3*(H2,1,2,3,4);8*1H2/q3*+2;;;;;;;;;;;/p-6