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EC number: 215-231-4
CAS number: 1314-35-8
The soil moisture and pH were measured in samples collected from the
parent control and treatment soils on day 0. At test termination (study
day 56), the moisture content and soil pH were determined from samples
of test medium collected from a single replicate test chamber (i.e.,
replicate A) for all treatment levels. The soil samples were collected
prior to the enumeration of the juvenile worms. The pH was measured
using a WTW Model pH 330i pH meter. The percent moisture was calculated
as the difference between the wet and dry soil samples and presented as
percent of the soil dry weight using a Mettler Toledo HR73 Halogen
Moisture Analyzer. A continuous temperature record was measured with an
electronic data logger in a chamber containing moistened control soil
and placed in the water bath. Light intensity was measured at test
initiation with a LI-COR Model LI-189 light meter equipped with a
No toxicity to soil microorganisms
data of sufficient quality are available for tungsten trioxide (target
substance). However, toxicity to soil micoorganisms data are available
for sodium tungstate (source substance), which are used for read-across.
Due to lower water solubility and lower toxicity for the target
substance compared to the source substance, the resulting read-across
from the source substance to the target substance is appropriate as a
conservative estimate of potential toxicity for this endpoint. In
addition, read-across is appropriate because the classification and
labelling is more protective for the source substance than the target
substance, the PBT/vPvB profile is the same, and the dose descriptors
are, or are expected to be, lower for the source substance. For more
details, refer to the read-across category approach description in the
Category section of this IUCLID submission or Annex 3 of the CSR.
Reason: Other justification.
Justification: According to the Data Submission Manual 5: How to Complete a Technical Dossier for Registrations and PPORD Notifications (RELEASE 2.1), ECHA-08-B-06-EN, for registrations of >1000T, one long-term test must be provided either for toxicity to soil macroorganisms (except arthropods), or for toxicity to terrestrial arthropods. Data requirements have been adequately covered with an OECD Guideline 222, Earthworm Reproduction Test. Thus, a study examining toxicity to terrestrial arthropods is not required.
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.
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