Cadmium, atomic no.: 48, symbol as Cd, weight at 112.411, is a soft, bluish-white metal and is easily cut with a knife. It is similar in many respects to zinc. Interestingly, a characteristic cadmium "scream" is heard on bending a cadmium bar (such as that illustrated above). Cadmium and its compounds are highly toxic. Silver solder, which contains cadmium, should be handled with care.
it is rare that preparation of cadmium in the laboratory should be required bacause of environmental concerns about cadmium. The isolation of cadmium is associated with zinc recovery as cadmium is an impurity in zinc ores.
Products available
Product Name
Formula
Grade
Description
Applications
Cadmium Metal
Cd
99.0%
99.95%
99.99%
99.995%
silvery gray metallic
Battery;
Alloy
Cadmium Oxide
CdO
99%
red-brown powder
Pigments;
Coating and plating;
solar film target
Standard Specifications
Cadmium Metal is a soft, malleable, ductile, toxic, bluish-white bivalent metal. It is similar in many respects to zinc but forms more complex compounds. About three-quarters of all the cadmium used is in batteries, predominantly in rechargeable nickel-cadmium batteries. Most of the remaining quarter is used mainly for cadmium pigments, coatings and plating, and as stabilizers for plastics.
Code
Cd
Pb
Zn
Fe
Cu
Ti
As
Sb
Sn
Total
(%)min.
(ppm) max.
Cd-3
99.90
0.05
0.02
0.004
0.02
0.004
0.002
0.002
0.002
0.100
Cd-2
99.95
0.02
0.005
0.003
0.01
0.003
0.002
0.002
0.002
0.050
Cd-1
99.99
0.004
0.002
0.002
0.001
0.003
0.002
0.002
0.002
0.010
Cd-0
99.995
0.002
0.001
0.001
0.0005
0.002
0.002
0.0002
0.0002
0.005
Cadmium Oxide is prepared commercially by oxidizing cadmium vapor in air. ?Cadmium oxide in the form of thin films has been used in applications such as photodiodes, phototransistors, photovoltaic cells, transparent electrodes, liquid crystal displays, IR detectors, and anti reflection coatings. CdO microparticles undergo bandgap excitation when exposed to UV-A light and is also selective in phenol photodegradation; Cadmium oxide is used in cadmium plating baths, electrodes for storage batteries, cadmium salts, catalyst, ceramic glazes, phosphors, and nematocide. Major uses for cadmium oxide is as an ingredient for electroplating baths and in pigments.
Code
CdO
Total impurities
(%) min.
(%) max.
CdO-2N
99
1
48
Cd
112.41
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Minor Metals
