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: 270-115-0
CAS number: 68411-30-3
Microbial parameters (10
functional or structural endpoints) were reviewed but not further used
by Jensen et al. (2007) in the PNECsoil assessment as originally
proposed in Jensen et al. (2001). The EC10values for
microbial processes observed in the laboratory ranged from <8–793 mg
aqueous LAS/kg soil DM. Microbial iron reduction was the parameter most
sensitive to LAS (extrapolated value of 5 mg/kg; Jensen et al., 2001),
but this endpoint was not considered relevant for aerobic agricultural
soils because the extrapolation was not well justified and in conflict
with experimental data conducted under more realistic conditions (field
trials) later developed by Jensen et al. (2007). Furthermore, the lowest
microbial effect concentrations had been observed in the case of dosing
of aqueous LAS solutions, whereas in reality LAS enters soil in a sludge
matrix, where bioavailability was shown to considerably mitigate toxic
effects (Elsgaard et al., 2001; Gejlsbjerg et al., 2001). For example,
ammonium oxidation, an important aerobic transformation process showed a
lowest EC10value of 14 mg/kg for aqueous dosing, versus 68
mg/kg for LAS in a sludge matrix (Elsgaard et al., 2001). In the latter
study, microbial communities also showed a strong recovery potential
(Schowanek et al. 2007).
In conclusion, terrestrial
toxicity to soil micro-organisms is not needed considering the higher
rate of sensitivity, and thus protection afforded by, studies on plants
and invertebrates exposed to LAS under more realistic test 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.
Do not show this message again