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EC number: 234-522-7
CAS number: 12007-92-0
The WHO (1998) review of boron noted that highly water soluble materials
are unlikely to bioaccumulate to any significant degree and that borate
species are all present essentially as undissociated and highly soluble
boric acid at neutral pH. The available data indicate that both
experimental data and field observations support the interpretation that
borates are not significantly bioaccumulated.
Boron is known to be a critical element for the normal growth and
productivity of aquatic and terrestrial plants. Boron is incorporated
into plant cell walls, so some accumulation vs. the environment may be
anticipated, i.e., active transport. The minimum required level in
plants is dependent on the plant species.
While several studies report concentrations on boron in plant tissues,
only few provide both soils and tissue concentrations, data required to
derive the BSAF values can be found in section 4.3.1 and 4.3.2. These
values are well below BSAF values used to establish significant
bioconcentration (BSAF 3000 to 5000).
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