Registration Dossier
Registration Dossier
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EC number: 271-756-9 | CAS number: 68607-24-9
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 12 µg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 9 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 1.2 µg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 430 µg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1.25 mg/kg sediment dw
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 125 µg/kg sediment dw
- Assessment factor:
- 500
- 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:
- 1 mg/kg soil dw
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 6.7 mg/kg food
- Assessment factor:
- 30
Additional information
Based on the available data for the aquatic compartment C20/22 ATQ is most toxic to daphnia with an acute EC50 (48h) of 1.4 mg/L and a chronic NOEC reproduction (21d) of 119 µg/L.
Based on the available data for the freshwater sediment compartment C20/22 ATQ is most toxic to the endobenthic worm Lumbriculus variegatus with an NOEC reproduction (28d) of 62.5 mg/kg dw.
Based on the available data for the terrestrial compartment C20/22 ATQ is most toxic to soil microorganisms with a NOEC of 10 mg/kg soil dw.
Conclusion on classification
Short-term effects
The Environmental classification has to take into account the lowest acute value for aquatic species which is the Daphnia EC50 (48h) of 1.4 mg/L (see Section 6.1.5). This study was carried out in river water to ensure a reliable testing of the cationic surfactant C20/22 ATQ. As a mitigation might have taken place reducing the ecotoxicity, a Mitigation factor of 10 has be applied as a worst case (see CEFIC APAG Aquatic testing approach for Cationic surfactant, REACH Category Approach ‘Primary alkyl amines’). The corrected EC50 (48h) Daphnia to be used in Classification is 1.4/10 mg/L = 0.14 mg/L which leads to R50 for DSD and a M factor of 1 for preparations.
In addition C20/22 ATQ is readily biodegradable, but failed 10-day windows (see Section 5.2.1) and due to the low octanol water partitioning coefficient of 3.3 (see Section 4.7) bioaccumulation can be neglected. The criteria of CLP2011/286/EU(log Kow >= 4) is not fulfilled.
Based on these facts an environmental classification should be based on the ecotoxicity only as the criteria for long-term effects are not fulfilled.
Proposed classification according DSD 67/548/EEC for Short-term effects:
N, R50 with a M factor of 1 for preparations
Proposed classification according CLP 2011/286/EUfor Short-term effects
Acute Category 1, H400
Long-term (chronic) effects
According to the 2ndATP of CLP (286/2011/EU) there are different approaches for the environmental classification of Long-term effects depending on the number of available chronic ecotoxicity data. As three chronic ecotoxicity data for C20/22 ATQ are available the classification for long-term effects has to be based on the chronic ecotoxicity data. The lowest chronic data is the NOEC Daphnia( 21d) 0.119 mg/L in river water (see Chapter 7.1.1.2.2). Due to potential mitigation of ecotoxicity in river water an Application factor of 10 has to be applied resulting in a NOEC Daphnia (21d) of 0.012 mg/L which results for this substances in a Chronic Category 1 Classification.
In Summary
Proposed classification according CLP2011/286/EU for Long-term effects:
Chronic Category 1, H410
OVERALL ENIVIRONMENTAL CLASSIFICATION
Proposed classification according CLP 2011/286/EU for Short-term & Long-term effects:
Acute Category 1, H400 Chronic Category 1, H410 (no M factor)
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