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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Ecotoxicological Summary

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.002 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.11 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
1.6 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
0.72 mg/kg sediment dw
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.072 mg/kg sediment dw
Assessment factor:
1 000
Extrapolation method:
assessment factor

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.15 mg/kg soil dw
Assessment factor:
10
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
7.2 mg/kg food
Assessment factor:
90

Additional information

Wash oil (WO) is a liquid UVCB substance mainly consisting of 2- and 3-ring aromatic compounds, some 50 % of which composed of naphthalene (Naph) (~ 11 - 13 %), 2-methylnaphthalene (2 -MN) (~ 17 - 20 %), 1-methylnaphthalene (1 -MN) (~ 7 - 9 %) and acenaphthene (~ 13 - 15 %). These are expected to largely represent the physico-chemical and environmental properties of the tar oil.

For most endpoints (exceptions see below), no long-term toxicity data is available for WO itself. Therefore, acenaphthene (typically approx. 13 – 15 % in WO) is adopted as relevant marker to represent WO with a maximum marker concentration of 40 % (for justification see Chapter 7.1.).

The acenaphthene-specific PNECs have been transformed to WO-adjusted PNECs in order to compensate for emissions from WO other than from acenaphthene only Therefore, the maximum acenaphthene content (40 %) has been related to the identifiable fraction in WO (89 %), i.e. the marker-specific PNECs have been multiplied by 40/89 = 1/2.2 = 0.45 or divided by 2.2. The results are WO-adjusted PNECs, based on acenaphthene toxicity and WO composition.

Three PNECs, concerning 'intermittent release', 'STP' and 'soil', directly relate to either wash oil (WO) or a structure-related tar oil, here: creosote [CAS no. 8001-58-9]. They have been broken down to the marker level in order to assure that exposure (based on the marker) comply with the PNEC reference. For this purpose, the WO-based PNECs have been multiplied by the derived correction factor of 0.45.

Conclusion on classification

Based on acute toxicity data (the lowest LL50 < 10 mg/L), wash oil requires classification for environmental hazard

  • according to Regulation (EC) No 1272/2008 amended by Regulation (EC) No 790/2009 with aquatic chronic 2, H411.