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
The NOEC for fresh water sediment organisms (first instar larvae of Chironomus riparius) was > 1317 mg La/kg dw or > 1545 mg lanthanum oxide/ kg dw based on a guidline study with Lanthanum trichloride hexahydrate
The sediment toxicity of Lanthanum trichloride hexahydrate was investigated according to OECD 218 under GLP conditions (Dietzmann, 2010). First instar larvae of Chironomus riparius were exposed to a concentration range in a sediment water system, in which the test item Lanthanum trichloride hexahydrate was spiked into the sediment. Nominal concentrations were 673 - 3407 mg Lanthanum trichloride hexahydrate/kg dw, according to 460 - 2327 mg Lanthanum trichloride, anhydrous/kg dw or 260 to 1317 mg La/ kg dw, calculated from the measured La concentration of the stock solution. Chironomid emergence and development rate were measured at the end of the exposure period of 28 days. The EC50 could not be calculated because none of the concentrations tested had shown toxic effects to the chironomids. The NOEC could be stated as ≥ 2327 mg Lanthanum chloride, anhydrous/kg dw and corresponds to 1317 mg La/kg dry weight or 1545 mg Lanthanum oxide per kg dw.
The toxicity to sediment organisms of Lanthanum chloride is used for the assessment of lanthanum oxide sediment toxicity as well. As lanthanum chloride has a much higher water solubility, it is likely to have a higher bioavailability to sediment organisms and can be regarded as a worst case surrogate. The speciation in sediment will in any case also be dependent on the environmental or experimental conditions.
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