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

Measured data are available for Hydrocarbons, C10-C13, n-alkanes, isoalkanes, <2% aromatics in which the 72 hour EL50 value of >100 mg/l and NOELR value of =100 mg/l (WAF loading rate) (highest concentration tested) were determined for the effects of the test substance on growth rate of Pseudokirchneriella subcapitata.

A second, equally reliable, study for Hydrocarbons, C10-C13, n-alkanes, isoalkanes, <2% aromatics also reports a 72 hour EL50 value of >100 mg/l and NOELR value of =100 mg/l (WAF loading rate) (highest concentration tested) for the effects of the test substance on growth rate of Pseudokirchneriella subcapitata.

Measured data are available for Hydrocarbons, C12-C15, n-alkanes, isoalkanes, <2% aromatics in which the EL50 was found to be >100 mg/l and the NOELR was =100 mg/l.

Measured data are available for Hydrocarbons, C14-C16, n-alkanes, isoalkanes, <2% aromatics in which the 72-hour EL50 >100 mg/l and NOELR =100 mg/l were determined for effects on growth rate based on WAF loading rate.

Key value for chemical safety assessment

Additional information

No measured aquatic algae data are available for the registration substance. However, reliable data are available for closely related substances covering the same carbon number range, including other Fischer-Tropsch process-derived substances.

Measured toxicity data are available for Shell GTL Solvent GS190 (Hydrocarbons, C10-C13, 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 a loading rate of 100 mg/l; 72-hour EyL50 and ErL50 values were >100 mg/l and NOELR values were ≥100 mg/l. Total Organic Carbon analysis of the 100 mg/l loading rate WAF test preparations at 0 and 72 hours showed measured carbon concentrations of less than the limit of quantification, determined to be 1.0 mg C/l. The results of the test are considered to be reliable.

 

Measured toxicity data are available for Shell GTL Solvent GS215 (Hydrocarbons, C12-C15, n-alkanes, isoalkanes, <2% aromatics) to the freshwater green alga Pseudokirchneriella subcapitata ( Vryenhoef, 2014e). 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 a loading rate of 100 mg/l; 72-hour EyL50 and ErL50 values were >100 mg/l and NOELR values were ≥100 mg/l. Total Organic Carbon analysis of the 100 mg/l loading rate WAF test preparations at 0 hours showed a measured carbon concentrations of 3.96 mg C/l. A decline in measured carbon concentration was observed at 72 hours to 0.98 mg C/l. The results of the test are considered to be reliable.

 

Measured toxicity data are available for Shell GTL Solvent GS250 (Hydrocarbons, C14-C16, n-alkanes, isoalkanes, <2% aromatics) to the freshwater green alga Pseudokirchneriella subcapitata (Vryenhoef, 2014f). 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 a loading rate of 100 mg/l; 72-hour EyL50 and ErL50 values were >100 mg/l and NOELR values were ≥100 mg/l. Total Organic Carbon (TOC) analysis of the 100 mg/l loading rate WAF test preparation at 0 hours showed a measured concentration of 6.14 mg C/l. A decline in measured carbon concentration was observed at 72 hours to 3.04 mg C/l. The results of the test are considered to be reliable.

 

Measured toxicity data are available for Shell GTL Solvent GS270 (Hydrocarbons, C15-C19, n-alkanes, isoalkanes, <2% aromatics) to the freshwater green alga Pseudokirchneriella subcapitata (Vryenhoef, 2014d). 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 a loading rate of 100 mg/l; 72-hour EyL50 and ErL50 values were >100 mg/l and NOELR values were ≥100 mg/l. Total Organic Carbon (TOC) analysis of the 100 mg/l loading rate WAF test preparation at 0 hours showed a measured concentration of 4.93 mg C/l. A decline in measured carbon concentration was observed at 72 hours to 0.79 mg C/l. The results of the test are considered to be reliable.

These results are used as weight of evidence to demonstrate that Hydrocarbons, C11-C16, n-alkanes, isoalkanes, <2% aromatics is not harmful to algae.

Categories Display