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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
10 000 mg/L

Additional information

2 -Hexyldecan-1-ol is a member of the Guerbet Alcohols, which comprises a range of branched long chain alcohols C12-32. It is also structurally related to the substances of the OECD SIDS Long Chain Alcohols (LCA) categories, comprising a range of straight and branched long chain alcohols C6-22.

Experimental data for the Guerbet and LCA categories has been evaluated and trends in the environmental fate of long chain alcohols was used to extrapolate to other member of the category for ecotoxicological endpoints.

Reliable studies are available for four representatives of the Guerbet alcohols category; 2-butyloctan-1-ol, 2-hexyldecan-1-ol, 2-octyldodecan-1-ol, and alcohols C32-36 branched.

Only with the short chain Guerbet alcohol 2-butyloctanol acute toxicity was observed in the fish. The C12 Guerbet alcohol showed acute toxicity to Oncorhynchus mykiss with an effects concentration of 0.48 mg/L. In contrast, no acute toxicity to fish at the level of water solubility was observed for 2-hexyldecanol, 2-octyldodecanol and branched C32-36 alcohols as with their equivalent linear analogues (C16, C20 and C32-36 long chain alcohols). Acute effects data for two fish species ranged from 3,000 mg/L to >10,000 mg/L. This is in agreement with the findings of the OECD SIDS report (described above) that the longest chain alcohols are unlikely to exhibit acute toxicity to aquatic organisms at the low solubility limits.