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Ecotoxicological information

Ecotoxicological Summary

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
5.2 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
52 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.5 µg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
5 µg/L

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
0.195 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.019 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.036 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

Classification related key information

Biodegradation in water: under test conditions no biodegradation observed (2% after 28 d; OECD 301C)

Bioaccumulation in organisms: low potential (log Pow: 2.6, undissociated form; OECD TG 117, HPLC method)

 

Acute toxicity (freshwater):

- to Fish: LC50 (96 h): 5.7 mg/L (measured, initial)

- to aquatic invertebrates: EC50 (48 h): 5.2 mg/L (measured, initial)

- to Algae: ErC50(72 h): 29 mg/L (measured, initial)

 

Chronic toxicity (freshwater):

- to Fish: not available

- to aquatic invertebrates: not available

- to Algae:NOErC (72 h): 5 mg/L (measured, initial) 

Classification justification according to CLP

The substance 2,5-Xylenol (EC No 202-461-5) is listed on Annex VI of the Regulation (EC) No 1272/2008 (CLP Regulation). The harmonised classification and labelling for 2,5-Xylenol is Aquatic Chronic 2.
The harmonized classification is in line with the data listed above. 2,5-Xylenol is not readily biodegradable and has a low potential to bioaccumulate. The classification is based on the lowest acute effect concentration determined for aquatic invertebrates (EC50 (48 h): 5.2 mg/L) and the lack of rapid biodegradability. Based on the available data the self-classification for 2,5-Xylenol is Aquatic Chronic 2 according to the consolidated version of Regulation (EC) No 1272/2008 and further amendments (ATPs).