Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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: 215-231-4 | CAS number: 1314-35-8
Endpoint summary
Administrative data
Description of key information
Due to similar or lower transformation/dissolution results for tungsten trioxide (the target substance) than sodium tungstate (the source substance), the resulting toxicity potential would also be expected to be similar or lower, so read-across is appropriate. In addition, read-across is justified because the classification and labelling is the same or less severe for the target substance, and the PBT/vPvB profile is the same. Finally, the dose descriptors are, or are expected to be, sufficiently similar or higher for the target substance, and read-across to the source chemical is adequately protective. 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.
The following information is taken into account for acute fish toxicity for the derivation of PNEC:
No deaths were observed at the saturation concentration under exposure conditions in an acute toxicity test with tungsten trioxide; therefore, a definitive LC50 could not be determined and read-across to sodium tungstate is used for this endpoint. In a flow-through test using zebrafish and testing another soluble tungsten compound with the same classification and PBT profile (sodium tungstate) the LC50 observed was found to be greater than the highest concentration tested (>181 mg sodium tungstate/L or approximately 106 mg W/L).
Additional information
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.
