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Sediment toxicity

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Description of key information

No data on wash oil itself is available. Acenaphthene, a key component of wash oil, has been adopted as marker. Toxicity values have been located for estuarine sediment only.

Key value for chemical safety assessment

EC50 or LC50 for marine water sediment:
211 mg/kg sediment dw
EC10, LC10 or NOEC for marine water sediment:
156 mg/kg sediment dw

Additional information

No experimental data is available for creosote oil, acenaphthene fraction (wash oil) itself. Thus, information originating from the marker substance acenaphthene (for justification of selection see Chapter 7.1.) is used as substitute in order to characterise long-term effects of wash oil on sediment organisms.

The toxicity values had originally been produced in sediment containing 3 % organic carbon, using Rhepoxynius abronius, a freeburrowing, marine infaunal amphipod (Swartz et al., 1997). The indicated LC50 and LC10 data have been "normalised" by recalculating them to a standard carbon content of 10 %.