Registration Dossier

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

No measured algal toxicity data are available for the registration substance itself. However, reliable data are available for related Fischer-Tropsch process-derived products in the relevant carbon number range. These are read across to Hydrocarbons, C9-C11, n-alkanes, isoalkanes, <2% aromatics.

Measured toxicity data are available for Shell GTL Solvent GS160 (Hydrocarbons, C8-C11, n-alkanes, isoalkanes, <2% aromatics) to the freshwater green algaPseudokirchneriella subcapitata(Vryenhoef, 2014b). The test was conducted under static (no renewal of the test media) conditions in accordance with OECD Test Guideline 201 and method C3 of EC Regulation No. EC 761/2009. Appropriate modifications to the test and media preparation procedures were made to take account of the test substance containing multiple constituents, having low solubility in water and being potentially volatile. No effects on growth (expressed in terms of yield (y) and growth rate (r)) ofP. subcapitatawere observed after 72 hours exposure to the test medium prepared as a water-accommodated fraction (WAF) at a loading rate of 100 mg/l; 72-hour EyL50and ErL50values were >100 mg/l and NOELR values were ≥100 mg/l.

Measured toxicity data are available for Shell GTL Solvent GS170 (Hydrocarbons, C9-C12, n-alkanes, isoalkanes, <2% aromatics) to the freshwater green alga Pseudokirchneriella subcapitata (Vryenhoef, 2014c). The test was conducted under static (no renewal of the test media) conditions in accordance with OECD Test Guideline 201 and method C3 of EC Regulation No. EC 761/2009. Appropriate modifications to the test and media preparation procedures were made to take account of the test substance containing multiple constituents, having low solubility in water and being potentially volatile. No effects on growth (expressed in terms of yield (y) and growth rate (r)) of P. subcapitata were observed after 72 hours exposure to the test medium prepared as a water-accommodated fraction (WAF) at loading rates of 10 to 391 mg/l; 72-hour EyL50 and ErL50 values were >391 mg/l and NOELR values were ≥391 mg/l. Analysis of the 391 mg/l WAF at the start and end of the test showed it to contain less than 0.22 mg/l of dissolved constituents of the substance, which was the limit of quantification (LOQ) of the analytical method (GC-FID). The results of the test are considered to be reliable.

Key value for chemical safety assessment

Additional information

Categories Display