Cadmium nitrate

Cadmium (II ) nitrate

White crystals

Fixed

2.46 g · cm -3

350 ° C.

Well in water (1100 g · l-1 at 20 ° C)

Attention

300 mg · kg -1 ( LD50, rat, oral)

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Cadmium nitrate is a white, hygroscopic solid with an unpleasant odor. The substance occurs in different hydrates or anhydrous. Like other cadmium compounds and cadmium nitrate is suspected to be carcinogenic.

Production

Cadmium nitrate can be prepared by dissolving in nitric acid, followed by cadmium Kristallisiation.

Properties

Cadmium nitrate is a white solid which is readily soluble in water compared to many other cadmium compounds. Four different hydrates with varying amounts of water of crystallization is known to be stable in different temperature ranges. Between -16 and 3.5 ° C, the nonahydrate Cd ( NO3) 2 · H2O 9 most stable, 3.5 to 48.7 ° C, the tetrahydrate Cd (NO3) 2 · 4 H2O. This is from 48.7 ° C two equivalents of water to 56.8 ° C, the dihydrate Cd (NO3) 2 · 2 H2O stable. Above this temperature is cadmium nitrate from water- free. Anhydrous cadmium nitrate decomposes in the heat of cadmium oxide and nitrous gases.

Toxicology

Cadmium nitrate is to be suspected carcinogens and is classified as carcinogenic category 1 as well as germ cell mutagen category 3A. Since it is water soluble, it can also be absorbed through the skin.

Use

Cadmium nitrate is used in the glass and porcelain manufacturing for the production of pearl luster. In addition, used for the production of other compounds of cadmium as well as the manufacture of nickel-cadmium batteries.