Registration Dossier
Registration Dossier
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EC number: 232-443-2 | CAS number: 8030-30-6 Refined, partly refined, or unrefined petroleum products produced by the distillation of natural gas. It consists of hydrocarbons having carbon numbers predominantly in the range of C5 through C6 and boiling in the range of approximately 100°C to 200°C (212°F to 392°F).
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The estimated 72-hr LL50 value for Tetrahymena pyriformis, one of the most sensitive aquatic microorganism species, is 15.41 mg/L.
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 petroleum substance and membrane-water partition coefficients (KMW) that describe the partitioning of the hydrocarbons between the water and organism. The estimated 40-hr EL50 value forTetrahymena pyriformis, one of the most sensitive microorganism species, is 15.41 mg/L.
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