Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Currently viewing:

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.