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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

The estimated 72 hour EL50 value for activated sludge, one of the most sensitive microorganism species, ranged from 72.13 - 246.26 mg/L in estimates made in the PETROTOX computer model.

The estimated 72 hour EL10 value for activated sludge ranged from 6.35 - 32.20 mg/L in estimates made in the PETROTOX computer model.

Key value for chemical safety assessment

Additional information

Measured data was not available. 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 petroleum substance and membrane-water partition coefficients (KMW) that describe the partitioning of the hydrocarbons between the water and organism.

The estimated 72 hour EL50 value for activated sludge, one of the most sensitive microorganism species, ranged from 72.13 - 246.26 mg/L in estimates made in the PETROTOX computer model.

The estimated 72 hour EL10 value for activated sludge ranged from 6.35 - 32.20 mg/L in estimates made in the PETROTOX computer model.