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EC number: 203-910-8 | CAS number: 111-81-9
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The determination of the growth inhibition of algae was carried out on Pseudokirchneriella subcapitata (previously known as Selenastrum capricornutum). Those were exposed to methyl undec-10-enoate at different doses, up to saturation. EC and NOEC results are reported below: EbC50-72h: 0.36 mg/l (0.32-0.4) ErC50-72h: 0.43 mg/l (0.35-0.71) EbC10-72h: 0.28 mg/l (0.21-0.32) ErC10-72h: 0.36 mg/l (0.16-0.43) NOECb: <0.30 mg/l NOECr: 0.35 mg/l
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 0.43 mg/L
- EC10 or NOEC for freshwater algae:
- 0.36 mg/L
Additional information
The determination of the growth inhibition of the freshwater algae Pseudokirchneriella subcapitata exposed to the test item methyl undec-10 -enoate for 72 hours was performed following the method C3 described in Directive 92/69/EEC of the European Commission and in the guideline 201 of the OECD. Algae were exposed to a range of concentrations of methyl undec-10 -enoate dissolved in dilution water. The toxic effect measured during the assay was the inhibition of cellular multiplication over a time period of 72 hours.
The results were as follows:
EbC50-72h = 0.36 mg/l; Eb10-72h = 0.28 mg/l; NOECb < 0.3 mg/l
ErC50-72h = 0.43 mg/l; Er10-72h = 0.36 mg/l; NOECr = 0.35 mg/l
With these results the test item methyl undec-10enoate has to be classified as category 1 for acute environmental toxicity, according to both OECD-GHS and 67/548/ECC.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.
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