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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The estimated protozoan, Tetrahymena pyriformis, 48-hr EL50 value is 48.39 mg/L based on growth inhibition, for hexane and the 48-hr NOEL is 10.82 mg/l for hexane.

Key value for chemical safety assessment

Additional information

The aquatic toxicity was estimated using the Petrotox computer model, 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 partition coefficients (KMW) that describe the partitioning of the hydrocarbons between the water and organism. The estimated protozoan, Tetrahymena pyriformis, 48-hr EL50 value for this substance is 48.39 mg/L based on growth inhibition, for hexane and the 48 -hr NOEL is 10.82 mg/l for hexane.