Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 235-120-4
CAS number: 12070-08-5
Titanium carbide was not
tested for terrestrial toxicity and read-across to titanium dioxide and
titanium trichloride was used for these endpoints.
For titanium substances,
the read-across strategy is predicated on the assumed presence and
bioavailability of a common metal anion in environmental media after
exposure to titanium compounds. This is a reasonable assumption for the
majority of inorganic compounds.
endpoints, it is the relative mobility and resulting bioavailability in
various environmental compartments that determines the potential
toxicity to ecological receptors. In the absence of data for titanium
carbide, the most simplistic and conservative approach to hazard
evaluation, using the read-across strategy, is to assume that titanium
carbide which is to be evaluated shows the same systemic hazards as
titanium dioxide and TiCl3, which show a higher release of
titanium ions compared to titanium carbide (T/D test, solubility below
the detection limit of 0.4 µg/L). (Bioelution
results (KMHC, 2012) are in this case of minor relevance as earthworms
and woodlice digest food by enzymatic degradation during gut passage
without influence of gastric fluids.)
Titanium dioxide is not
toxic to soil macroorganisms: Bulk titanium dioxide was not toxic to Eisenia
fetida in an earthworm reproduction test (OECD 222) at a
concentration of 1000 mg/kg soil dw, and no effects were noted in a
feeding study with Porcellio scaber at concentrations up to 3000
mg TiO2/kg food.
Relevant key studies for
the endpoints toxicity to terrestrial plants and toxicity to terrestrial
microorganisms are not available. However, additional testing is not
required for both endpoints. In accordance with REACH Annex IX, 9.4,
column 2, the equilibrium partitioning method (EPM) based on aquatic
data may be applied to assess the hazard to soil organisms in the
absence of reliable toxicity data for soil microorganisms and
terrestrial plants. However, since no hazard was identified for aquatic
organisms, consequently no hazard is identified for terrestrial
organisms via EPM. In
addition, the available key studies on earthworms and soil arthropods do
not indicate toxic effects for soil organisms. Furthermore, the results
of the T/D test indicate that Ti need not be expected to be bioavailable
in the soil matrix.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again