Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

No experimental data is available for anthracene oil < 50 ppm BaP (AOL) itself but data have been identified for the closely structure-related tar oil creosote WEI Type B (for read-across compare to CSR Chapter 5.3.4. and Chapter 7.1.). For this substance, the NOEC(28 d, collembola) was estimated to be nominally 3.5 mg/kg soil dw, recalculated to standard soil (3.4 % organic matter) (Bruhnke 2007). No corresponding toxicity value for earthworm is available. Creosote Grade B caused only transient inhibitory effects on the activity of soil microorganisms at concentrations as high as 1000 mg/kg soil dw (nominal) (Scheerbaum 2007).

In addition to creosote data, information on terrestrial toxicity is available for phenanthrene. This substance is a main component in AOL present in concentrations up to 31% (average 28%). Considering the composition of AOL, the toxic properties of other AOL constituents, and the high percentage of phenanthrene in AOL, phenanthrene is identified as substantial key compound and selected as marker substance. Terrestrial toxicity of AOL can be represented by phenanthrene.

Chronic toxicity data for phenanthrene in soil are available for annelids, collembola, plants, crustaceans, and microbial processes. The data obtained on collembola (Sverdrup et al., 2001, 2002) are the lowest toxicity values that are considered as sufficiently robust. Four EC10 values for Folsomia in sandy loam soil are available including "ageing" of phenanthrene in soil (Sventrup et al. 2002). The geometric mean of these EC10s is 18 mg/kg dw (see also EU 2008).

Reference:

EU 2008: European Union Risk Assessment- Report of COAL-TAR PITCH, HIGH TEMPERATURE (Final draft version May 2008) [http://echa.europa.eu/documents/10162/433ccfe1-f9a5-4420-9dae-bb316f898fe1]