Registration Dossier
Registration Dossier
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EC number: 265-054-1 | CAS number: 64741-53-3 A complex combination of hydrocarbons produced by vacuum distillation of the residuum from atmospheric distillation of crude oil. It consists of hydrocarbons having carbon numbers predominantly in the range of C20 through C50 and produces a finished oil with a viscosity of at least 100 SUS at 100°F (19cSt at 40°C). It contains relatively few normal paraffins.
Long-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
For unrefined / acid treated oils, the long-term toxicity for fish endpoint is addressed by read across to long-term toxicity for Daphnia. Read across to DAEs has been applied for the long-term toxicity to aquatic invertebrates endpoint, which is justified based on similarities in composition and physical/chemical properties between unrefined / acid treated oils and DAEs. Toxic effects of hydrocarbons are primarily caused by narcosis, and occur in a narrow range of molar concentrations across aquatic taxa; hence, read across between species is justified.
Supporting data estimated from the PETROTOX computer model show no long-term toxicity of unrefined / acid treated oil to freshwater fish at or below its maximum attainable water solubility (Redman et al. 2010b). These data support the applied read across.
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