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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Reference
Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reason / purpose:
read-across source
Reason / purpose:
read-across source
GLP compliance:
yes (incl. certificate)
Reference substance (positive control):
yes
Remarks:
potassium dichromate (once per month, test conducted April 7 to 8, 2010)
Key result
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
> 0.035 mg/L
Nominal / measured:
meas. (initial)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: 95% not applicable
Key result
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
> 1 600 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Validity criteria fulfilled:
yes
Conclusions:
2-Octyldodecan-1-ol is not toxic to daphnia.The LC50 is > 0.035 mg/l (measured). No toxicity to daphnia within the range of water solublity.
Executive summary:

According to data of two structurally similar substances (2-hexyldecan-1-ol (C16) and mixture of 2 -octyldodecan-1-ol and 2 -hexyl-1-tetradecanol (C20)) which show no acute toxicity to daphnia up to the limit of water solubility no toxicity to invertebrates is expected for 2 -octyldodecan-1 -ol up to the limit of water solubility.

Description of key information

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
1 600 mg/L

Additional information

There are data on acute toxicty to daphnia for three representatives of the Guerbet alcohol category.

The C12 Guerbet alcohol 2-butyloctan-1-ol show acute toxicity to daphnia in contrast to the higher alcohols 2-hexyldecan-1-ol (C16) and mixture of 2 -octyldodecan-1-ol and 2 -hexyl-1-tetradecanol (C20) which show no acute toxicity to daphnia up to the limit of water solubility. These effects can be a consequence of decreasing water solubility with increasing chain length. Thus no aquatic toxicity is considered for the Guerbet alcohols with chain lengths >= C16 with an extremely low water solubility.