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EC number: 273-694-8
CAS number: 69011-50-3
A scum formed on the surface of molten zinc and zinc alloys.
Due to homeostatic control mechanisms, bioaccumulation is in general not
relevant to essential elements, like zinc. On bioaccumulation, the EU
risk assessemnt report (ECB 2008) concludes that“it is concluded that
secondary poisoning is considered to be not relevant in the effect
assessment of zinc. Major decision points for this conclusion are the
following. The accumulation of zinc, an essential element, is regulated
in animals of several taxonomic groups, for example in molluscs,
crustaceans, fish and mammals. In mammals, one of the two target species
for secondary poisoning, both the absorption of zinc from the diet and
the excretion of zinc, are regulated. This allows mammals, within
certain limits, to maintain their total body zinc level (whole body
homeostasis) and to maintain physiologically required levels of zinc in
their various tissues, both at low and high dietary zinc intakes. The
results of field studies, in which relatively small differences were
found in the zinc levels of small mammals from control and polluted
sites, are in accordance with the homeostatic mechanism. These data
indicate that the bioaccumulation potential of zinc in both herbivorous
and carnivorous mammals will be low.
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