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EC number: 273-708-2
CAS number: 69011-71-8
A scum formed on the surface of molten aluminum and molten aluminum alloys.
The only data from which one can estimate the percentage of
aluminium absorbed from inhalation exposure is from exposures in the
occupational environment. As the percentage of aluminium estimated to be
absorbed during inhalation exposure is greater than from oral aluminium
intake, it seems unlikely that absorption from the GI tract accounts for
the absorption of all inhaled aluminium.
The absorption of aluminium from the lung can be estimated from a
few studies of occupational aluminium exposure. Daily urinary aluminium
excretion by 12 aluminium welders, whose lung aluminium burden may have
been approaching a steady state, averaged 0.1 mg. Daily aluminium
deposition into their lungs was estimated to be 4.2 mg. This would
suggest absorption of ~ 2.4% of the aluminium (Sjögren et al., 1997).
Results from workers exposed to ~ 0.2 to 0.5 mg soluble Al/m3 in
the air (particle size not described) suggest ~ 2% absorption (Pierre et
al., 1995). Fractional absorption was similar in the workers in a second
study who were exposed to a similar air aluminium concentration
containing 25% respirable (< 10 μm diameter) aluminium (Gitelman et al.,
1995) The estimate of26Al absorption from inhalation of26Al
oxide particles which had a MMAD of 1.2 μm by two subjects was 1.9%
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