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Short-term toxicity to fish

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Description of key information

The estimated freshwater fish 96-h LL50 (Lethal Loading Rate) value is 2.587 mg/L based on mortality.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
0.885 mg/L

Additional information

There are measured acute toxicity data available for octane on the rainbow trout, Oncorhynchus (Morrow et al. 1975). However, due to significant methodological deficiencies the data provided by these authors are considered not realiable. Thus, an LC50 (96 h) was calculated.

The aquatic toxicity was estimated using the Petrotox computer model (v. 3.04), which combines a partitioning model used to calculate the aqueous concentration of hydrocarbon components as a function of substance loading with the Target Lipid Model used to calculate acute and chronic toxicity of non-polar narcotic chemicals. Petrotox computes toxicity based on the summation of the aqueous-phase concentrations of hydrocarbon block(s) that represent a hydrocarbon substance and membrane-water partitioning coefficients (KMW) that describe the partitioning of the hydrocarbons between the water and organism. The estimated freshwater fish 96-h LL50 (Lethal Loading Rate) value is 2.587 mg/L based on mortality.

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