Registration Dossier
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EC number: 941-381-1 | CAS number: -
Long-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Water accommodated fractions of light alkylate naphtha produced a 21 -day NOELR (No Observed Effect Loading Rate) value of 2.6 mg/L based on reproduction with Daphnia magna. These data are used as read-across to all substances in the naphtha category.
Supporting PETROTOX (version 4.01) modelled values are available. PETROTOX model v 4.01 predicted a chronic 21-d EL10 of the substance to D.magna to be 1.92 mg/L.
Key value for chemical safety assessment
Additional information
Water accommodated fractions of light alkylate naphtha produced a 21 -day NOELR (No Observed Effect Loading Rate) value of 2.6 mg/L based on reproduction with Daphnia magna. These data are used as read-across to all substances in the naphtha category.
Supporting PETROTOX (version 4.01) modelled values are available. PETROTOX model v 4.01 predicted a chronic 21-d EL10 of the substance to D.magna to be 1.92 mg/L.
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.
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