zinc [Zn]
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Introduction
From the German zink meaning tin. Ores were used in medieval times in China & India. Pure zinc was first isolated in India in the 13th century, then in Europe by the German chemist Andreas Sigismund Marggraf in 1746.
Occurrence
Characteristics
- a blueish white crystalline metallic element of low to intermediate hardness
- ductile when pure, but in the commercial form, it is brittle at ordinary temperatures & becomes ductile upon slight heating
- tarnishes in air
Uses
- essential micronutrient for both plants & animals (second most common trace element)
- galvanizing iron
- protective coating for iron & steel
- alloys such as brass
- dry cell batteries
- see zinc oxide
- zinc sulfide used as a phosphor in cathode ray tubes The major isotopes of zinc are Zn-64 & Zn-67. Zn-65 is a radioactive isotope that decays mainly by k-capture with a 1/2 life of 243.8 days. Zn-65 is used as a tracer in studies of zinc metabolism.
More general terms
Additional terms
Component of
- undecylenate/zinc
- methyl salicylate/zinc/zinc gluconate
- menthol/zinc/zinc oxide
- glycerol/naphazoline/zinc/zinc sulfate
- folic acid/nicotinamide/zinc/zinc oxide
- diphenhydramine/zinc/zinc acetate
- dimethicone/zinc/zinc oxide
- calamine/zinc/zinc oxide
- calamine/phenol/zinc/zinc oxide
- benzocaine/pyrilamine/zinc/zinc oxide
- ascorbate/biotin/calcium carbonate/cobalamin/ferrous fumarate/folic acid/magnesium oxide/nicotinamide/pantothenate/pyridoxine/riboflavin/thiamine/vitamin a/vitamin e/zinc/zinc oxide
- alpha tocopheryl acetate/ascorbate/beta carotene/copper/copper sulfate/sodium selenite/zinc/zinc oxide
- alpha tocopheryl acetate/ascorbate/beta carotene/copper/copper sulfate/lutein/sodium selenite/zinc/zinc oxide