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: 215-200-5 | CAS number: 1312-81-8
Test substance is a mixture of rare earth chloride hexahydrate and rare earth oxidesLC50(72 h) > 3000 mg RE/L for Holotrichia parallela, larvae third stage (filter paper contact test)NOEC(until adult eclosion) > 3000 mg RE/L for Holotrichia parallela, larvae third stage (prolonged soil test)
No information is available on the toxicity to terrestrial arthropods with Lanthanum oxide, but data are available for this endpoint with a mixture of rare earth chloride hexahydrate and rare earth oxides (Li et al. 2006). The mixture was composed mainly of Cerium, Lanthanum and Praseodymium, a concentration of individual rare earth elements was not given. The structure analogy of the rare earth elements with similar toxicity was described by diverse authors (e.g. Sneller et al. 2000).
The short-term toxicity of a mixture of rare earth chloride hexahydrate and rare earth oxides onHolotrichia parallela(Coleoptera, larvae in the third stage) was tested in a filter paper contact test, yielding a LC50 > 3000 mg RE/L.
In a prolonged soil test groups of larvae (Holotrichia parallela) at the third larval stage were kept in the soil, spiked with mixed rare earth chloride hexahydrate and rare earth oxides. The exposure lasted until adult eclosion. Mortality, pupation and emergence were assessed after the exposure and revealed a NOEC value of > 3000 mg RE/kg soil.
Although the test substance was a mixed rare earth chloride hexahydrate and rare earth oxides with Cerium, Lanthanum and Praseodymium as rare earth elements, the high concentration without effects on mortality, emergence or pupation can be used for the assessment of Lanthanum oxide on terrestrial arthropods.
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.
Close Do not show this message again