A soft, blue-white metallic element. Cadmium has an abundance of about 0.1 ppm in the earth's crust. It primarily occurs as sulfide cadmium sulfide (greenockite) or cadmium carbonate (otavite) in ores rich in zinc, copper, or lead. The silvery metal was first isolated by Fredrich Stromeyer, a German chemist in 1817. Metallic cadmium is ductile and can be cut with a knife or rolled into a thin sheet. It slowly oxidizes in moist air to form cadmium oxide. Cadmium is used in soft solder alloys, in incandescent light filaments, and in nickel-cadmium batteries. It is also electroplated on iron and steel as a corrosion resistant coating. Cadmium salts have been used as red red, orange, and yellow yellow pigments in ceramic glazes and paints. Additionally cadmium sulfide and cadmium selenide are used as infrared transparent plates for infrared analysis.
Synonyms and Related Terms
Cd; cadmia (Lat.); cadmio (It., Esp.); Cdmio (Port.); Kadmio (Sven.); Kadmium (Deut.)
Reacts with acids. Insoluble in water and alkalis.
|Composition||Cd (atomic no. 48)|
|Molecular Weight||atomic wt = 112.41|
Hazards and Safety
Combustible. Metal and salts are highly toxic by ingestion and inhalation. Carcinogen.
Web Elements: Website
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