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EC number: 235-120-4
CAS number: 12070-08-5
Based on BCFs calculated from paired concentrations of titanium metal and titanium trichloride in soil and plant tissue, titanium exposures are not expected to result in the bioaccumulation of titanium in terrestrial organisms.
data on the behavior of titanium carbide in the environment are
available. Bioconcentration data for titanium metal and titanium
trichloride are presented in this section. The soluble species released
are expected to be similar for each of the compounds, and are thus
expected to behave similarly in the environment. However, the amount of
soluble species resulting from titanium metal and titanium trichloride
is different, with titanium trichloride being much more soluble.
Therefore, data for titanium metal and titanium trichloride are expected
to adequately capture the range of bioavailability of titanium carbide
in the environment. For more details refer to the attached read-across
54-day exposure relatively low bioaccumulation of titanium is observed
in leaves of Brassica napus, Brassica oleraccea, and Festuca rubra at
soil concentrations of 3040 mg Ti/kg soil dw, with calculated
concentration factors (BSAF) of approximately 0.0008, 0.00066, and
0.0002, respectively (Caille et al., 2005).
(2004) put in relation the concentration of Ti in roots of Festuca
sylvatica L. to soil concentration. Soil and root samples were taken
from a pristine sampling site in the South of Sweden that has been
untouched by forestry or other mechanical disturbance since last ≥ 50
years. The BSAF derived for beach roots is 0.16.
addition, Wallace et al. (1977) investigated bioconcentration of Ti
after 21 days in leaves, stems and roots of Phaseolus vulgaris in
solution culture. Plants were exposed at Ti concentrations of up to
10E-04 M. The highest observed BCF value was 0.001126 L/kg (roots).
it is concluded that titanium compounds are not expected to
bioaccumulate in terrestrial organisms.
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