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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

A reliable 72 h EC50 of 2.1 mg/L and a NOEC of 0.38 mg/l have been determined for the effects of the 2 -butyloctan-1-ol on the growth of the algae Pseudokirchnerella subcapitata.

Key value for chemical safety assessment

EC50 for freshwater algae:
2.1 mg/L
EC10 or NOEC for freshwater algae:
0.38 mg/L

Additional information

A reliable 72 h EC50 of 2.1 mg/L and a NOEC of 0.38 mg/l have been determined for the effects of the 2 -butyloctan-1-ol on the growth of the algae Pseudokirchnerella subcapitata. This result is in line with data available for the linear 1-dodecanol with an ECr50 of 0.66 mg/l.

Experimental data on two other respresentatives of the category (C16 and C20) show no toxicity to algae up to the limit of solubility. These results were cross-read to the remaining substances.

The effects observed for the C12 Guerbet alcohol can be a consequence of a higher water solubility of the substance with the shortest C-chain length of this category. Thus no aquatic toxicity is considered for the Guerbet alcohols with chain lengths >= C16 with an extremely low water solubility.