| Description |
Bluish-white metal, brittle when cast. Tarnishes in air, reacts with acids and alkalis.. Used for galvanizing iron, in alloys, e.g. brass, in batteries, as ZnO in rubber, and as polymer stabilizer. Diagnostic tests:
In a strongly reducing flame, the zinc in zinc minerals volatilizes when
heated before the blowpipe and is usually detected by the canary yellow
(hot) or white (cold) color of the ZnO coating on charcoal. Infusible zinc
silicate minerals give a green color when ignited with a Co(NO3)2
solution.
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